Download final cumulative practice test

PRACTICE TEST FOR CERTIFICATION
INSPECT/MAINTAIN PROPANE SYSTEMS
1.
Tanks and cylinders must be inspected for physical damage each time they are…
A.
B.
C.
D.
2.
A dot cylinder is marked with a 3 - 4 digit numerical code which indicates the
A.
B.
C.
D.
3.
regulation.
purging.
relief.
by-pass.
Dot propane cylinders must be re-certified after they have been in service for
A.
B.
C.
D.
5.
day and month of manufacture.
month and year of manufacture.
day and year of manufacture.
year of manufacture.
A dot cylinder utilizes single valve designed for 3 functions—filling and purging, shut-off, and
A.
B.
C.
D.
4.
filled.
sold.
purged.
mounted.
5 years.
10 years.
12 years.
15 years.
Use the drawing below to identify the 20% fixed liquid level gauge.
A.
B.
C.
D.
1
2
3
4
6.
A dot cylinder vent stem (dip tube) is _____ the same length on different size tanks.
A.
B.
C.
D.
7.
The properly adjusted pressure regulator is designed to operate at _____ inches of water column pressure
with a demand of half the potential load on the system.
A.
B.
C.
D.
8.
air or gas pressure.
air and barometric pressure.
gas density.
vapor capacity.
When connecting or disconnecting a gas line at an appliance you should use
A.
B.
C.
D.
12.
open the outage valve and drain the liquid.
remove the fill valve with the cap on.
burn off the gas with a suitable torch.
open the service valve until the vapor is gone.
A manometer is an instrument used to measure
A.
B.
C.
D.
11.
orifice
o-ring
valve
baffle
It is required that you change the fill valve on a mounted ASME tank. To safely remove tank pressure you
will
A.
B.
C.
D.
10.
10
11
12
14
The 80% stop-fill float valve has a piston assembly and ______ that restricts the inlet fill capacity.
A.
B.
C.
D.
9.
always
never
usually
rarely
channel locks.
back-up wrench.
pipe wrench.
pliers.
A regulator must be installed so that the vent is within 45 degrees of
A.
B.
C.
D.
straight up.
straight down.
parallel.
horizontal.
13.
An excess flow POL valve when activated, _______ the flow of propane.
A.
B.
C.
D.
14.
What part of a propane regulator is repairable?
A.
B.
C.
D.
15.
ice crystals.
rust.
temperature drop.
liquid.
What agent may be used to free up a severe moisture blockage in the propane system?
A.
B.
C.
D.
20.
16" W.C.
14" W.C.
12" W.C.
11" W.C.
The propane regulator can be shut down by moisture in contaminated propane because of
A.
B.
C.
D.
19.
it is listed for RV use only.
a shut-off valve is installed immediately before the connector.
it is made of brass.
it has a minimum cross sectional area equivalent to 20 square inches.
What is the maximum allowable lock-up pressure of any RV propane system?
A.
B.
C.
D.
18.
thermostat.
regulator.
relief valve.
oven.
A quick disconnect is allowed to be used inside the coach if
A.
B.
C.
D.
17.
Diaphragm
Adjusting spring
Vent
None
A lock-up test is conducted to determine the operating range of the
A.
B.
C.
D.
16.
reduces
stops
increases
begins
dry desiccant
methyl alcohol
ethyl alcohol
ethyl mercapton
Which one of the following conditions must exist during a lock-up test?
A.
B.
C.
D.
all appliances operating
only pilot lights lit
50% BTU capacity
no propane demand
21.
When adjusting a propane pressure regulator, a _________ must be put on the system.
A.
B.
C.
D.
22.
A leak test must be conducted for a minimum of ________ minutes per NFPA 1192.
A.
B.
C.
D.
23.
dust in the regulator.
moisture contamination in the fuel.
a clogged vent.
oil contamination in the regulator.
Purging is the process of displacing air from a propane container using
A.
B.
C.
D.
28.
operating tests
lock-up tests
atmospheric tests
leak tests
When checking the propane system, the manometer rapidly fluctuates with a demand on the system. This
indicates
A.
B.
C.
D.
27.
low tank pressure.
restricted gas flow.
false container pressure.
oil in the tank.
Which of the following is not a type of regulator test?
A.
B.
C.
D.
26.
two stage with straight vent
single stage
two stage with side vent
auto-changeover
An improperly purged tank will cause
A.
B.
C.
D.
25.
1
3
5
10
Which type of regulator by itself is not approved by code on RVs?
A.
B.
C.
D.
24.
demand of 100%
demand of 75%
demand of 50%
demand of 25%
compressed air.
liquid propane.
dry gas.
propane vapor.
The marketing “wc47.7” on the protective collar of a dot tank indicates
A.
B.
C.
D.
a welded collar 47.7" in diameter.
a container weight of 4.77 lbs.
a water capacity of 47.7 lbs.
a water capacity of 47.7 gal.
29.
Approximately how many gallons of propane are in a 40 lb cylinder?
A.
B.
C.
D.
30.
A customer complains that in very cold weather the automatic changeover valve on his dot cylinders does
not work properly since he runs out of gas in both at the same time. A possible cause could be
A.
B.
C.
D.
31.
1/5th of the lower limit of combustibility.
1/3rd of the lower limit of combustibility.
1/5th of the upper limit of combustibility.
1/4th of the upper limit of combustibility.
A component that reduces the high pressure from the tank down to a constant pressure for supply to the
appliances is
A.
B.
C.
D.
36.
vapor
white liquid
pressurized air
water
The sulfur compound entitled ethyl mercaptan is added to LP gas as an odorant in concentrations of
A.
B.
C.
D.
35.
10
20
80
90
In the event that an 80% stop-fill device does not work, you would be aware to stop filling when _____
appears at the outage gauge.
A.
B.
C.
D.
34.
temperature
level of the liquid
type of tank
BTU demand
A propane container should never be filled with liquid propane to more than _________ % of its capacity.
A.
B.
C.
D.
33.
an iced-oven vent.
a blockage to one side of the changeover.
oil contamination.
cylinder refrigeration.
Which of the following does not affect the vapor flow from a propane container?
A.
B.
C.
D.
32.
9.0
9.5
10.0
10.5
a relief valve.
a regulator.
an 80% reducer valve.
tank service valve.
A two-stage regulator is designed to reduce pressure in the first stage to_____.
A.
B.
C.
D.
6-8 oz.
10-12 psi.
14"-16" W.C.
20-22 psi.
37.
Any propane cylinder due for re-certification:
A.
B.
C.
D.
38.
At sea level, liquid propane ceases to boil at
A.
B.
C.
D.
39.
temperatures less than -44° F.
temperatures greater than -44° F
temperatures less than 0° C.
temperatures greater than 100° F.
A propane regulator must have rated capacity equal to or greater than
A.
B.
C.
D.
40.
must be repainted.
can not be filled or used.
must have a new relief valve.
must have a sight gauge calibrated.
a 2 1/2" diameter if round and 2" x 4" if rectangular.
the BTU input of the largest appliance.
the wetted surface potential of the smallest tank.
the total BTU input of all appliances.
In closing a propane container service valve you should use: only
A.
B.
C.
D.
wrenches.
pliers.
hand tightening.
socket wrenches.
DIAGNOSE/MAINTAIN DC ELECTRICAL SYSTEMS
41.
When using a ferro-resonant power converter without a battery, often a _______ is used to perform
filtering.
A.
B.
C.
D.
42.
Two 12 VDC batteries connected in series will provide ______ VDC
1.
2.
3.
4.
43.
power resistor
12 volt lamp
capacitor
diode
6
12
24
48
If a 12 VDC circuit breaker will not reset, you should
A.
B.
C.
D.
disassemble and clean the contacts.
disassemble and replace the contacts.
replace the breaker with one of the same amperage.
replace the breaker with one of higher amperage.
44.
Which type of converter must have a battery attached for proper operation?
A.
B.
C.
D.
45.
The linear converter has _______ output.
A.
B.
C.
D.
46.
diodes & batteries
regulators & fusible links
rectifiers & inverters
solar panels & isolators
When replacing fuses on any appliance, you should always use one with
A.
B.
C.
D.
51.
fill it to the top.
charge the battery first.
compensate for temperature.
all of the above.
Alternators rely on ________ & _________ to provide "clean" DC output.
A.
B.
C.
D.
50.
sulfur oxide.
oxygen
nitrogen.
hydrogen.
When using a hydrometer you must
A.
B.
C.
D.
49.
Alkaline
Lead acid
Nickel cadmium
Dry cell
A gassing battery gives off
A.
B.
C.
D.
48.
filtered
constant
unfiltered
isolated
What type of battery is generally used in an RV's 12 VDC system?
A.
B.
C.
D.
47.
Switchmode
Ferro-resonant
Linear
Exponential
a higher amp and volt rating.
a lower amp rating.
the same amp and volt rating.
the same amp and higher volt rating.
A fully charged lead acid battery at rest will show an approximate voltage of_______ VDC.
A.
B.
C.
D.
14.5
14.1
12.8
12.0
52.
Fuses and fusible links are designed to _____ during an overload condition.
A.
B.
C.
D.
53.
As the gauge of copper wire increases, its’ diameter
A.
B.
C.
D.
54.
switch
hardness
amperage
voltage
The current in a circuit is__________ proportional to the applied voltage and _________ proportional to
the current resistance.
A.
B.
C.
D.
59.
continue your work.
cut it off and start over again.
use a crimp connector.
use a butt connector.
To determine correct wire size, you must calculate the _________load.
A.
B.
C.
D.
58.
Sail Switch
Time Delay Relay
Limit Switch
Diode
If you remove copper when stripping a wire, you should
A.
B.
C.
D.
57.
voltage.
resistance.
capacity.
inductance.
Which of the following components is not classified as a device used to divert current from one conductor
to another?
A.
B.
C.
D.
56.
decreases in size.
changes composition.
increases in size.
varies in length.
Paralleling batteries increases
A.
B.
C.
D.
55.
open
close
short
conduct
directly & inversely
inversely & directly
reversely & inversely
directly & expressly
If a 15 amp breaker continues to blow after you have verified a 9 amp load you should replace the
A.
B.
C.
D.
heat spring.
contacts.
heat bar.
breaker.
60.
Before removing and installing a replacement power converter you would
A.
B.
C.
D.
61.
A monitor panel sensor is
A.
B.
C.
D.
62.
magnetic
mechanical
thermostatic
analog
To test an ASME tank propane site gauge, a technician will check for proper __________.
A.
B.
C.
D.
67.
leads are bad.
should be replaced.
needs new brushes.
needs new bearings.
Modern RV furnaces use a ________time delay relay that is integrated into the circuit board.
A.
B.
C.
D.
66.
step up voltage.
step down voltage.
act like a relay.
act like a diode.
If a 12 volt blower motor will not run and there is power to the motor leads, the motor
A.
B.
C.
D.
65.
split
thermally
moisture
AC
A DC electrical ballast function is to
A.
B.
C.
D.
64.
a float type mechanism.
an electrical contact.
an insulator.
a rectifier.
12 VDC blower motors are _______ protected.
A.
B.
C.
D.
63.
turn the branch ac circuit breaker on.
always disconnect battery and ac power supply.
always disconnect battery isolator.
always short across battery terminal (+) to ground to discharge converter filters.
resistance
voltage
amperage
watts
A defective timed delay relay on a RV furnace will cause _________ operational problems.
A.
B.
C.
D.
blower motor
thermostat
igniter
limit switch
USE THE FOLLOWING SCHEMATIC TO ANSWER QUESTION 68
A THROUGH K = CONNECTOR POINTS
68.
Bulb L1 burns out quickly. A tech measures 12 volts between points A & E and 6 volts between A & I.
What is the problem?
A.
B.
C.
D.
69.
To protect the meter when doing an ohms test, insure that the
A.
B.
C.
D.
70.
meter is properly zeroed.
meter is set on proper scale.
circuit is de-energized.
meter has the correct polarity.
The current flowing at any point in a series circuit is
A.
B.
C.
D.
71
Weak battery
Defective relay
Short in resistor R1
Open resistor R2
the same at any point.
lower after a component.
non-existent after a component.
higher before a component.
When testing the charging capacity of a functional electronic converter when connected to a fully charged
battery, the voltage measurement will yield approximately
A.
B.
C.
D.
12.65 VDC.
13.50 VDC.
103.5 VAC.
14.65 VDC.
USING THE PICTURE OF THE MULTIMETER SHOWN BELOW, ANSWER QUESTION 72.
72.
Using the 50 VDC scale, the correct meter reading is ______ VDC.
A.
B.
C.
D.
120
29
24
7
USING THE CIRCUIT EXAMPLE ANSWER QUESTIONS 73 AND 74.
73.
With all switches closed, voltage measured at V1 is ____________________VDC.
A.
B.
C.
D.
74.
With switch S2 closed, voltage measured at V2 is ___________________ VDC.
A.
B.
C.
D.
75.
0
6
9
12
To properly measure current with a VOM, you must connect the VOM
A.
B.
C.
D.
76.
0
6
9
12
in parallel with the source.
across the component.
in series with the source.
on the positive side.
To check a disconnected wire harness assembly you would perform a ____ test.
A.
B.
C.
D.
voltage
watt
continuity
amperage
77.
When using a voltmeter to test for voltage in a simple circuit, always connect the meter in ___________
with the load.
A.
B.
C.
D.
78.
A diode should have continuity in
A.
B.
C.
D.
79.
series
parallel
resistance
relation
one direction.
two directions.
three directions.
four directions.
What symbol indicates a diode?
A.
B.
C.
D.
80.
According to Ohm's law, to find amperage you must
A.
B.
C.
D.
multiply volts by resistance.
divide amps by resistance.
multiply volts by amps.
divide volts by resistance.
DIAGNOSE/MAINTAIN AC ELECTRICAL SYSTEMS
81.
An inverter is used to create ________ power.
A.
B.
C.
D.
82.
AC
DC
inverted wave
cycled wave
The neutral wire connected to the 120 VAC shoreline power should be ungrounded
A.
B.
C.
D.
in all 120 VAC RV wiring.
only in RV's employing 3 or more branch circuits.
only when 30 amp service is used.
only in “Class A” motor homes.
USING THE GENERATOR ROTOR PICTURE BELOW, ANSWER QUESTION 83.
83.
What is the technician checking for?
A.
B.
C.
D.
84.
A conductor is used to
A.
B.
C.
D.
85.
transfer electricity from one point to another.
resists electrical current.
allow current to leak to ground.
induce electricity to other wires.
A material that has very high resistance and is used for supporting or separating conductors is called
A.
B.
C.
D.
86.
Current
Voltage
Grounds
Not a valid check
an insulator.
a semi-conductor.
a resistor.
an inductor.
Current supplied by commercial power lines and RV generators is known as
A.
B.
C.
D.
alternating current.
direct current.
inducted current.
accelerating current.
87.
What voltage will you read between “L1” and “N.”
240V
L1
A.
B.
C.
D.
88.
30 amps
50 amps
100 amps
150 amps
splice the wire with scotch locks.
replace the wire with a new one of the proper length.
use only crimping connectors and splice.
replace the outlet with a larger one.
The minimum amp breaker that could be used in-line to adequately protect a 120 VAC water heater with a
1400 watt element is ____amp.
A.
B.
C.
D.
93.
counter clockwise
left hand
clockwise
opposite
When moving a 120 VAC outlet and the wire is short you should
A.
B.
C.
D.
92.
increase.
remain the same.
decrease.
decrease 1 amp for every 10 watts.
If a 2000 watt inverter was used to supply an 1800 watt, 120 VAC load (15 amps) it would require more
than _______ of DC power from the battery.
A.
B.
C.
D.
91.
120
12
240
480
When making a 120 VAC connection to a screw, the wire should be circled around the screw post
connection in a ________ direction.
A.
B.
C.
D.
90.
L2
As you lower the wattage of a 120 VAC heating element, its’ amperage draw will
A.
B.
C.
D.
89.
N
10
15
20
30
When stripping a wire, you should strip only
A.
B.
C.
D.
an area to fit the connector.
1/8" larger than the connector.
1/4 " larger than the connector.
3/8 " larger than the connector.
94.
If a customer complains of receiving shocks from his/her vehicle when plugged in, the first test should be a
A.
B.
C.
D.
95.
When using an ohmmeter the K symbol is equal to _________ ohms.
A.
B.
C.
D.
96.
circuit breakers
diodes
capacitors
conductors
A 120 VAC polarity test is done by using
A.
B.
C.
D.
100.
40
400
4,000
40,000
GFCI protection can be provided through specific GFCI receptacles or GFCI _______.
A.
B.
C.
D.
99.
measure current and voltage.
measure resistance of components.
change or replace component parts.
charge the capacitors in circuit.
The ohmmeter indicates 40 on the RX 1000 scale. The actual resistance of the component is ________
ohms.
A.
B.
C.
D.
98.
10
100
1,000
10,000
When working on a 120 VAC electrical circuit, power should be applied only as necessary to
A.
B.
C.
D.
97.
polarity check of the shore cord.
polarity check of the battery system.
voltage check.
converter voltage check.
a manometer.
a ground monitor.
a galvanometer.
an ammeter.
When reading voltage with a voltmeter, you should always start with the
A.
B.
C.
D.
lowest voltage scale
lowest ohmmeter scale
highest voltage scale
highest ohmmeter scale
Using the picture of the multimeter below, answer question 101.
101.
Using the 250V scale, the correct meter reading is _______ VAC.
A.
B.
C.
D.
102.
In a simple series circuit, there is
A.
B.
C.
D.
103.
240
140
120
115
more than one path for current to flow.
at least two paths for current to flow.
only one path for current to flow.
more than one path for ground.
In a simple parallel circuit, there is
A.
B.
C.
D.
more than one path for current to flow.
only one path for current to flow.
at least three paths to ground.
one path for electron flow.
104.
The current flowing through a 120 VAC heating element at 1200 watts is
A.
B.
C.
D.
105.
.5 amps
1.0 amps
5.0 amps
10.0 amps
What symbol indicates connected wires?
A.
B.
C.
D.
106.
What symbol indicates a switch?
A.
B.
C.
D.
107.
What symbol indicates a ground connection?
A.
B.
C.
D.
108.
A capacitor is a device that
A.
B.
C.
D.
109.
The three fundamental conditions that must exist to create voltage from magnetism are a magnetic field,
conductor & ________.
A.
B.
C.
D.
110.
motion
heat
light
silver oxide
The strength of the magnetic field around a conductor will vary
A.
B.
C.
D.
111.
temporarily stores electrical energy.
is used to check electrical pressure.
indicates direction of a magnetic field.
measures electrostatic force between charged particles.
directly with current.
directly with resistance.
inversely with current.
inversely with conductivity.
Frequency is also known as
A.
B.
C.
D.
columns.
amplitude.
hertz.
capacitance.
INSPECT/MAINTAIN PLUMBING SYSTEMS
FRESH WATER SYSTEMS
112.
According to welding rod standards, an ABS welding rod requires a welding temperature of _______.
A.
B.
C.
D.
113.
The city water connection of an RV with potable water tanks attached to the same water distribution system
must have
A.
B.
C.
D.
114.
500° F
300° F
212° F
228° C
a pressure regulator.
a 3/4 inch male swivel connection.
a backflow prevention device installed.
an accumulator tank.
The best method for testing a water distribution system for leaks is to
A.
B.
C.
D.
listen for the demand pump cycling when no demand is present.
perform a pressure drop test using a gauge and water or air pressure.
visually check for leaks.
use a leak detector solution.
115.
The purpose of a p-trap at every fixture drain in a plumbing drainage system is to
A.
B.
C.
D.
116.
When an RV demand pump cycles periodically when there is no demand on the system (faucets are off),
this usually indicates
A.
B.
C.
D.
117.
prevent siphonage.
trap grease and other debris.
provide a water seal preventing gases from escaping into the RV.
prevent water drainage noise.
no water in the system.
the holding tanks are overfilled.
a leak in present somewhere in the supply system.
insufficient electrical current to the pump.
The purpose of a vacuum breaker on the inlet of an RV toilet is to
A.
B.
C.
D.
prevent overfilling the bowl.
allow air to mix with the toilet water for better flushing.
prevent siphonage of toilet bowl water into the RV potable water system.
prevent pressure buildup in the supply line.
DIAGNOSE/MAINTAIN/REPAIR CHASSIS/TOWING COMPONENTS
118.
On an electric brake system the part of the wheel that the electromagnet grabs on to is called the
A.
B.
C.
D.
119.
Testing electromagnet specifications on a single axle trailer with 7", 10" & 12" brakes will yield a reading
of ______.
A.
B.
C.
D.
120.
2 ohms +/- 0.02 ohms
1 ohms +/- 0.02 ohms
0.5 ohms +/- 0.02 ohms
0.010 ohms +/- 0.02 ohms
A 12 VDC source voltage supplied to a functional electromagnet with 2 ohms resistance will read ______
of inductive current flow.
A.
B.
C.
D.
121.
hub.
drum armature.
spindle.
actuator arm.
6 amps
4 amps
2 amps
10 amps
The best tool to use for checking trailer electric brake functionality is an __________.
A.
B.
C.
D.
ohmmeter
ammeter
VOM
all of the above
122.
Surge brake systems may be ________ when used in conjunction with load equalizing hitches.
A.
B.
C.
D.
123.
On an electric brake system, the electronic brake controller determines the amount of braking force applied
through the use of a
A.
B.
C.
D.
124.
doubles the braking force of the towed vehicle
reducing the braking force of the towed vehicle
voids the warranty of the tow vehicle brake system
enhances the speed capacity of the tow vehicle
On a 7-way round pin type trailer connector, which pin is for the brake?
A.
B.
C.
D.
129.
Star wheel.
Allen wrench.
Phillips screwdriver.
Torque wrench.
Tapping into the hydraulic brake system of a tow vehicle will result in which of the following?
A.
B.
C.
D.
128.
tow vehicle battery.
tow vehicle alternator.
trailer battery.
pigtail connector.
Hydraulic brakes are adjusted at the wheel by the use of a
A.
B.
C.
D.
127.
5 ply
10 ply
15 ply
20 ply
The trailer breakaway switch of an electric brake system is activated by a cable and energizes the brakes
through the use of the
A.
B.
C.
D.
126.
fly weight
pendulum weight
brake master cylinder
brake wheel cylinder
LRE on a tire means the tire has a load range rating of a _____ rated tire.
A.
B.
C.
D.
125.
calibrated
disabled
upgraded
enabled
blue
red
green
yellow
The trailer hitch that bolts to a bumper is a/an
A.
B.
C.
D.
Class 1
Class 2
Class 3
Class 4
130.
In vehicles equipped with an air suspension system, lean conditions can be corrected by
A.
B.
C.
D.
131.
A brake light converter might be necessary when
A.
B.
C.
D.
132.
the trailer has back-up lights.
combining a 2-wire and a 3-wire system.
a tow vehicle uses an electric brake controller.
a tow vehicle uses an hydraulic brake controller.
Weight distribution hitches are also called ____________ hitches.
A.
B.
C.
D.
133.
changing the size of the bag.
adjusting the stabilizer bar.
increasing tire pressure on the low side.
adjusting the height control valve(s).
equalizing
wheelbarrow
dead weight
5th wheel
Wheel lugs should be tightened to
A. manufacturer's torque specifications.
B. customer's torque specification.
C. 65 foot lbs.
D. 150 foot lbs.
134.
Oil on top of a shock absorber is an indication of
A.
B.
C.
D.
135.
On a motor home a steering wheel cross bar at a 45 degree angle indicates that
A.
B.
C.
D.
136.
the steering wheel is adjusted incorrectly.
the steering wheel is adjusted correctly.
the front wheel caster is correct.
there is improper tire wear.
On a 5th wheel when electric landing gear jacks on the front will extend but not retract, the cause is likely to
be
A.
B.
C.
D.
137.
excessive oil.
defective seals.
bad bushings.
an over-torqued shock.
defective retracting motor.
reversed polarity.
defective switch.
defective cross-over linkage.
In a mechanical rubber suspension system, cracks in a rubber spring deeper than 3/8" would indicate that:
A.
B.
C.
D.
the bonding has failed.
the spring needs to be replaced.
the adjustment is too loose.
there is no problem.
138.
A complete failure of the rubber on one side of the torsion axle will cause
A.
B.
C.
D.
139.
Improperly tightening wheel lug nuts/lug bolts can cause
A.
B.
C.
D.
140.
sagging of the rubber.
a rough ride.
increase carrying capacity.
decrease carrying capacity.
A two axle trailer showing abnormal wear on one tire could be an indication of
A.
B.
C.
D.
142.
broken springs.
axle to lose its camber.
air pressure to decrease.
snapping lug bolt or stud.
In a mechanical rubber suspension system, overloading a rubber spring will cause
A.
B.
C.
D.
141.
wheel skipping.
ineffective braking.
dog tracking.
sagging on one side.
both axles out of alignment.
defective u-bolts.
one axle out of alignment.
defective equalizer (center pivot).
On a trailer, an electric tongue jack that ratchets or trips off is probably
A.
B.
C.
D.
overloaded.
underloaded.
incorrectly wired.
over-lubricated.
INSTALL/MAINTAIN APPLIANCES
143.
What meter is used to check running amperage on an AC compressor?
A.
B.
C.
D.
144.
Galvanometer
VOM
Clamp on ammeter
Test light
A water heater thermocouple will need to generate over _______ when heated in order to allow gas vapor
flow to continue to the pilot assembly.
A.
B.
C.
D.
12 VDC
12 MV
6 MVDC
103.5 VAC
145.
To check the current of a 120 VAC air conditioner fan motor on low speed, you would measure amperage
on the _____ to the motor.
A.
B.
C.
D.
146.
When a water heater shuts off due to temperature satisfaction, but a small flame is still burning at the main
burner orifice, the ____ should be replaced.
A.
B.
C.
D.
147.
resistance
pressure
millivolts
kilovolts
To manually discharge an air conditioner's run capacitor a technician should set the AC voltmeter to a
_____________ or higher AC scale.
A.
B.
C.
D.
151.
common and start terminals.
compressor casing and common terminal.
start and run terminals.
common and run terminals.
A thermocouple is a device when heated generates __________ to hold the propane gas safety value open
during operation.
A.
B.
C.
D.
150.
fan switch engaging
burner ignition
limit switch engaging
activation of time delay relay
After disconnecting the wires from the common start and run terminals of an air conditioner compressor,
you should have no continuity between the
A.
B.
C.
D.
149.
ECO of gas control
magnet of gas control
diaphragm gas control
entire gas control
What is the next step of operation after the thermostat closes in a forced combustion furnace?
A.
B.
C.
D.
148.
black wire
red wire
yellow wire
white wire
500 VAC
120 VAC
12 VDC
240 VDC
Before testing the air conditioner's electrical system you must first verify that _______ are correct for
operation.
A.
B.
C.
D.
watts
ohms
volts
amps
152.
What is the amperage draw of a 120 VAC, 1000 watt element?
A.
B.
C.
D.
153.
In a water heater the ECO is
A.
B.
C.
D.
154.
faulty thermistor
faulty thermostat
cooling unity leak
faulty by-pass screw
If in a pilot model furnace the thermocouple end in the pilot burner is distorted, you should
A.
B.
C.
D.
159.
limit switch
fan switch
thermostat relay
sail switch
Which of the following is not a cause for absorption refrigerator over cooling?
A.
B.
C.
D.
158.
orifice size and fuse size.
flue vent length and fan size.
physical size and fan switch.
orifice size and blower motor speed.
Restricted duct work at the furnace can cause the _______ to open.
A.
B.
C.
D.
157.
galvanometer test.
continuity test.
polarity test.
micro ammeter test.
Furnace size is controlled by different factors. Two of these factors are
A.
B.
C.
D.
156.
an emergency manual shut-off switch.
a high temperature shut-off device.
a high temperature opening device.
an automatic low pressure sensor.
To test a 120 VAC element in a water heater, you would run a
A.
B.
C.
D.
155.
0.12
12
8.3
83
reposition.
readjust.
recalibrate.
replace it.
When finding a broken gasket on the combustion chamber of a furnace, you must
A.
B.
C.
D.
soak it in alcohol and reseal it.
replace it with a new one.
seal it with silicon.
patch it with rubber compound.
160.
The anticipator setting on a thermostat is affected by the
A.
B.
C.
D.
161.
In a thermocouple, output is measured in
A.
B.
C.
D.
162.
improperly installed heating element
improperly sized heating element
shorted heating element
faulty capillary tube
An automatic refrigerator lights, but won't stay lit on gas. You would suspect a faulty
A.
B.
C.
D.
166.
level.
venting.
insulation of cabinet.
high side gas pressure.
The absorption refrigerator cools correctly on propane but is not cooling properly on 120 VAC when
connected to shore power. What component would not be associated with this fault condition?
A.
B.
C.
D.
165.
system regulator
safety valve
thermostat
thermocouple
An absorption refrigerator operates correctly until the outside ambient air temperature reaches 85 degrees F
or more, then cooling stops. The first item to check is its
A.
B.
C.
D.
164.
microamps.
milliamps.
millivolts.
megavolts.
Which of the following components does not control propane on or to a refrigerator?
A.
B.
C.
D.
163.
motor and valve.
module board and motor.
valve and module board.
fan switch and motor.
gas jet.
thermocouple.
thermister.
thermostat.
All fuel burning appliances except a _____ shall be designed and installed to provide for complete
separation of the combustion system or positive exhaust vent for the interior atmosphere of the recreation
vehicle.
A.
B.
C.
D.
range and oven
refrigerator
furnace
water heater
167.
An absorption refrigerator thermister senses interior unit temperature and controls unit operations through
the ___________ system.
A.
B.
C.
D.
168.
control
propane
relay
ignition
The basic components of a range oven burner control system are the
A.
B.
C.
D.
thermostat, safety valve, and burner
burner valve and burner
pilot, brace, and burner
thermostat and burner
DIAGNOSE/MAINTAIN GENERATORS
169.
A possible cause of a hunting or surging ac generator would be a/an
A.
B.
C.
D.
170.
With the generator running and ac output yielding low frequency, what is a probable cause?
A.
B.
C.
D.
171.
Increase voltage
Decrease voltage
No change to voltage
Reverse polarity of voltage
The voltage output of an ac generator is usually controlled by varying the
A.
B.
C.
D.
173.
Low engine speed
Low exciter voltage
High exciter voltage
Defective output circuit breaker
Increasing the generator output load would have what effect on the rotor field voltage?
A.
B.
C.
D.
172.
rich fuel mixture.
incorrect governor adjustment.
restricted exhaust system.
incorrect ignition timing.
number of windings in the stator.
DC excitor voltage.
reluctance of the air gap.
generator load.
When load testing an ac generator with a resistive load bank, do not
A.
B.
C.
D.
plug the load bank into the coach's outside receptacle.
cover all exposed connections with a non-conductive material.
disconnect generator output from coach.
perform testing in a well ventilated area.
174.
A short in the transformer primary winding would have what effect on output voltage?
A.
B.
C.
D.
Increase voltage
Decrease voltage
No change to voltage
Reverse polarity of voltage
USE THE GENERATOR SCHEMATIC BELOW TO ANSWER QUESTIONS 175-178
175.
An open in the K1 relay would cause what to happen when the S1 start switch is pressed?
A.
B.
C.
D.
176.
A blown F1 fuse would cause what to happen when the S1 start switch is pressed?
A.
B.
C.
D.
177.
Engine would not start
Engine would not crank
No output from generator
No battery condition meter (BCM)
A shorted CRL diode would cause what to happen when the unit is not running?
A.
B.
C.
D.
178.
Engine cranks but would not start
Engine would not crank
No output from generator
No battery condition meter (BCM)
Blow the F1 fuse.
Blow the F2 fuse.
The battery to drain.
Nothing.
An open in the K3 relay would cause what to happen to the AC generator operation?
A.
B.
C.
D.
No battery charge
Loss of oil pressure
Stop when S1 start switch is released
No voltage developed by generator
DIAGNOSE/MAINTAIN HYDRAULIC SYSTEMS
179.
Which of the following is not an effect of contaminated hydraulic fluid?
A.
B.
C.
D.
180.
Which of the following is not a safety concern when servicing hydraulic systems?
A.
B.
C.
D.
181.
Inefficient operation
Damage to the pump
Damage to the valves
Cavitation of the pump
Fluid flammability
Fluid pressure conditions
Fluid skin reactions and burns
Fluid vapor respiratory concerns
Which component is only used in duel cylinder slide room extension applications?
A.
B.
C.
D.
Synchronizing value
Relief value
Check value
PSI switch
182.
Cavitation can result from turbulent flow which forces a rise in fluid temperature causing the release of
______ air suspended in fluid.
A.
B.
C.
D.
water
air
metal
steam
REPAIR/REPLACE/MAINTAIN EXTERIOR COACH BODY
183.
The metal skin design that you see the most is called Mesa and the method used to lock the skins together is
called the
A.
B.
C.
D.
184.
RVs that have walls that are made to form a sandwich of interior paneling, extruded foam insulation and an
exterior sheet are properly known as ______ construction style.
A.
B.
C.
D.
185.
monocoque/aircraft
loose wall laid up
frame and sheet
rigid body
EPDM is a term that relates to
A.
B.
C.
D.
187.
bonded/laminated
rigid body
foam core
monocoque/aircraft
RV's that are riveted together to form side walls and roof are known as _________ construction style.
A.
B.
C.
D.
186.
Chicago lock.
Dallas lock.
Pittsburg lock.
Elkhart lock.
fiberglass siding.
rubber roofing.
end caps.
sheet metal.
Decals can be removed easily with
A.
B.
C.
D.
acetone.
WD-40.
heat.
mineral spirits.
INSTALL/MAINTAIN INTERIOR COMPONENTS
188.
A propane leak detector installed in an RV operates on nominal
A.
B.
C.
D.
189.
One of the first steps in spot cleaning an upholstered piece of furniture is to
A.
B.
C.
D.
190.
white putty.
seam sealer.
white glue.
liquid nitrate.
A warped counter top can be caused by
A.
B.
C.
D.
192.
remove the fabric from the piece.
spray the fabric with degreaser.
use detergent and mineral spirits.
pre-test a hidden area of the fabric.
When a patch is made in linoleum, the cut lines should be filled with
A.
B.
C.
D.
191.
9 VDC.
12 VDC.
120 VDC.
120 VAC.
direct exposure to sunlight.
too dark a color.
excessive moisture.
mounting screws too tight.
Each RV trailer equipped with fuel-burning equipment (other than the prime mover engine) or a 120/240
VAC electrical system shall be provided with a listed portable fire extinguisher with a minimum rating of:
A.
B.
C.
D.
5-A:C
5-A:D
5-B:C
5-B:D
PERFORM MISCELLANEOUS TASKS
193.
A work order should be completed
A.
B.
C.
D.
194.
only on safety-related jobs.
for IRS purposes only.
on every job.
when a customer requests an explanation.
When repairing a large gouge in a flat fiberglass panel, you would typically use
A.
B.
C.
D.
bondo, sand and finish
ABS cement
fiberglass mat, resin, fill, and finish
a fiberglass welding kit
195.
Which type of connector is typically not used for audio video applications?
A.
B.
C.
D.
196.
Heat generated by friction causes tire pressure to increase by ______ percent.
A.
B.
C.
D.
197.
spectrometer.
voltmeter.
ammeter.
thermometer.
What type of safety equipment is not required for MIG welding.
A.
B.
C.
D.
200.
a defective control module
an incorrect door switch
a bad ground
reversed polarity
The tool required to perform a hot skin check is a/an
A.
B.
C.
D.
199.
10-20
25-30
40-60
2-3
If an automatic electric step retracts when the door is open and extends when the door is closed, the likely
problem is
A.
B.
C.
D.
198.
BNC
Coaxial
RCA
Cat 5
Eye protection
Burn protection
Ultraviolet light protection
Hearing protection
The most important action a technician can use when dealing with irate customers is
A.
B.
C.
D.
listening to the customer.
explaining the dealer's policies.
referring the customer to the service manager.
trying to calm the customer down.
END OF ASSESSMENT