Download electricity exam - Florida Gateway College

A publication of the RV Training Institute @ FLORIDA GATEWAY COLLEGE
Rt 19 Box 1030, Lake City, FL 32025 Phone: 386.754.4285 Fax: 386.754.4785
TO:
TRAINING MENTORS
FROM:
JIM CARR
SUBJECT: ELECTRICAL EXAM
The following 13 pages is the FINAL EXAM to cap off
our weeks of electrical training. This exam is a timed
two (2) hour, closed book test which should be taken
after this week’s training class. Steve will give you
specific instructions on how to conduct this exam with
your technicians.
ELECTRICITY EXAM
NAME: _________________ DEALERSHIP: _____________
1.
Energy:
a.
b.
c.
d.
2.
Electricity can be:
a.
b.
c.
d.
3.
More protons than electrons.
More electrons than protons.
Equal number of protons and electrons.
No electrons or protons.
The particle that orbits the nucleus in an atom is the:
a.
b.
c.
d.
6.
A battery.
An electromagnetic generator.
A photocell.
A piezoelectric device.
An atom that is electrically neutral has:
a.
b.
c.
d.
5.
Transmitted and converted to other energy forms.
Produced by a chemical reaction.
Produced by an electromagnetic generator.
All of the above.
The primary source of electricity is:
a.
b.
c.
d.
4.
Is the ability to do work.
Can be converted from one form to another.
Is necessary for a modern world.
All of the above.
Electron.
Proton.
Neutron.
Meson.
Static electricity can be produced by:
A.
B.
C.
D.
Rubbing objects with different types of cloth.
Walking across a rug.
Combing your hair with a rubber comb.
All of the above.
1
7.
If two negatively charged objects are suspended in air close to one another:
a.
b.
c.
d.
8.
In an atom, the proton has:
a.
b.
c.
d.
9.
Has a deficiency of electrons.
Has an excess of protons.
Has an excess of electrons.
Has an excess of neutrons.
The smallest unit of an element is:
a.
b.
c.
d.
13.
Wood
Air
Light
Coffee
A negatively charged object:
a.
b.
c.
d.
12.
In orbit closest to the nucleus.
In the fourth orbit from the nucleus.
In the last orbit from the nucleus.
They cannot be found.
Of the following which is NOT an example of matter.
a.
b.
c.
d.
11.
A negative charge.
A neutral charge.
A positive and a negative charge.
A positive charge.
In an atom, free electrons are found:
a.
b.
c.
d.
10.
They will attract.
They will repel.
They will do nothing.
None of the above.
Compound
Atom
Molecule
Matter
Free electrons can be made to move in a specific direction by:
a.
b.
c.
d.
An internal force.
A hydraulic force.
An external force.
No force is required.
2
14.
The symbol for resistance is:
a.
b.
c.
d.
15.
Which of the following is NOT a good conductor?
a.
b.
c.
d.
16.
“V”
omega Ω
“O”
“E”
Aluminum
Silver
Gold
Glass
The symbol for a battery is:
a.
b.
c.
d.
17.
If a 100 ohm resister opens, it’s resistance will be:
a.
b.
c.
d.
18.
100
200
0
Infinite ohms.
A battery produces:
a.
b.
c.
d.
19.
\\
Alternating current.
Direct current.
No current.
Both AC and DC.
In a battery, current always flows from:
a.
b.
c.
d.
Positive to negative.
Positive to positive.
Negative to negative.
Negative to positive.
3
20.
Voltmeters are connected:
a.
b.
c.
d.
21.
Ammeters are connected so that:
a.
b.
c.
d.
22.
Type of material.
Cross-sectional area.
Length
All of the above.
When connecting an ohmmeter to a circuit:
a.
b.
c.
d.
26.
Volt
Ohm
Ampere
Watt
The resistance of a material depends on:
a.
b.
c.
d.
25.
The voltage must be maintained.
The Electromotive Force (EMF) must be maintained.
The potential difference must be maintained.
All of the above.
The unit of measurement for current is:
a.
b.
c.
d.
24.
All the current flows through it.
Polarity is observed.
All the voltage flows through it.
Both A and B.
To have a continuous current flow through a conductor:
a.
b.
c.
d.
23.
In series with the electrical components.
So that polarity is observed.
Across the voltage source.
Both B and C.
The power should be on.
The power should be off.
It must be connected in series.
It must be connected in parallel.
In a toaster:
a.
b.
c.
d.
The resistance of the wire converts electrical energy to heat.
The length of the wire converts electrical energy to heat.
The diameter of the wire converts electrical energy to heat.
All of the above.
4
27.
In the circuit shown, what is the power used by the resistor?
a.
b.
c.
d.
28.
How much power does a 10 hp motor use?
a.
b.
c.
d.
29.
Doubled.
The same.
Tripled.
Quadrupled.
In the circuit shown, what is the total current?
a.
b.
c.
d.
33.
I = P/V
I = V/P
I=VxP
I=PxV
If the voltage applied to a resistor is doubled, the power used by the resistor
will be:
a.
b.
c.
d.
32.
20 VDC
5 VDC
40 VDC
20 VAC
The formula for finding the current if the power and voltage are known is:
a.
b.
c.
d.
31.
746 kW
7.46 kW
7460 kW
.746 kW
In question 27, what is the applied voltage?
a.
b.
c.
d.
30.
20W
5W
0.2W
40W
5 amps
1 amp
2 amps
10 amps
In the circuit shown, meter 1 reads 2 amperes. Meter 2 should read:
a.
b.
c.
d.
4 amps
12 amps
2 amps
6 amps
5
34.
In question 36, what is the applied voltage?
a.
b.
c.
d.
35.
Using the following illustration, select the correct amount for total ohms:
a.
b.
c.
d.
36.
Equal to the sum of the branch circuits.
Equal to the difference of the branch circuits.
The same throughout the circuit.
None of the above.
In a properly fused parallel circuit when a short occurs:
a.
b.
c.
d.
40.
Equal to a sum of the branch voltages.
Equal to the difference of the branch circuits.
The same throughout the circuit.
None of the above.
In a parallel circuit the total current is:
a.
b.
c.
d.
39.
10 VDC
5 VDC
25 VDC
20 VDC
The applied voltage in a parallel circuit is:
a.
b.
c.
d.
38.
50 ohms
40 ohms
90 ohms
100 ohms
In the circuit shown, what is the voltage drop across the 10 ohm resistor?
a.
b.
c.
d.
37.
40 VDC
10 VDC
30 VDC
20 VDC
The fuse will blow.
The fuse will not blow.
The current will drop.
Nothing happens.
In the following illustration, if the 10 ohm resistor blows the M1 meter will read:
a.
b.
c.
d.
2A
2V
0A
10 A
6
41.
The symbol for an inductor is:
a.
b.
c.
d.
42.
A capacitor:
a.
b.
c.
d.
43.
What is the value of the resistor shown?
a.
b.
c.
d.
44.
1000 ohms / 5%
10,000 ohms / 5%
1000 ohms / 10%
10,000 ohms / 10%
A conductor has:
a.
b.
c.
d.
45.
Opposes the change in voltage.
Opposes the change in current.
Stores electrical energy.
Both A and C.
Many free electrons.
No free electrons.
Few free electrons.
520 free electrons.
Which of the diagrams shows the wires connected?
a.
b.
c.
d.
7
46.
The insulator found in a capacitor is called a:
a.
b.
c.
d.
47.
Conductor.
Transistor.
Dielectric.
Triac.
The symbol for a potentiometer is:
a.
b.
c.
d.
48.
The ability of a capacitor to store electrical energy is measured in:
a.
b.
c.
d.
49.
Henries.
Microfarads.
Farads.
Both B and C.
An inductor:
a.
b.
c.
d.
Opposes a change in voltage.
Opposes a change in current.
Opposes a change in resistance.
None of the above.
8
50.
The symbol for a capacitor is:
a.
b.
c.
d.
51.
To make a permanent magnet:
a.
b.
c.
d.
52.
To induce current into a wire:
a.
b.
c.
d.
53.
Soft iron must be used.
Hard iron must be used.
Hard copper must be used.
Soft copper must be used.
A magnetic field is needed.
A relative motion is needed.
Both A and B.
Steam must be used.
When a north pole and a south pole are brought close together:
a.
b.
c.
d.
They attract.
They do nothing.
They repel.
All of the above.
9
RV CONTROLS
PRE-TEST
1. ______
A. Battery
2. ______
B. Relay
3. ______
C. Normally Open Contacts
4. ______
D. Choke
5. ______
E. Normally Closed Contacts
6. ______
F. Fuse
7. ______
G. Diode
8. ______
H. Resistor
9. ______
I.
10. ______
J. Coil
11. ______
K. Switch
12. ______
L. Crossing of Wires
13. ______
M. Connection of Wires
14. ______
N. Capacitor
15. ______
O. Tapped Resistor
10
Lop
On this part of the test, you will select the description that best defines that
term. Place the letter of the description on the line next to the number of
the term.
1.
Match the term (numbers) to description (letter).
________ 1. Alternating current (AC)
_______ 24. Insulator
________ 2. Ampere
_______ 25. Inverter
________ 3. Amplitude
_______ 26. Lamp
________ 4. Battery Charging
_______ 27. Load
________ 5. Capacitors
_______ 28. Neutral
________ 6. Choke
_______ 29. Ohm
________ 7. Circuit
_______ 30. Open Circuit
________ 8. Circuit Breaker
_______ 31. Parallel Circuit
________ 9. Contacts
_______ 32. Piezoelectric
________ 10. Converter
_______ 33. Power
________ 11. Current
_______ 34. Relay
________ 12. Direct Current (DC)
_______ 35. Resistor
________ 13. Diode
_______ 36. Semi-conductors
________ 14. Effective Voltage
_______ 37. Series Circuit
________ 15. Frequency
_______ 38. Short Circuit
________ 16. Fuse
_______ 39. Source
________ 17. Generator
_______ 40. Specific Gravity
________ 18. Ground
_______ 41. Storage Battery
________ 19. Ground Fault Circuit Interrupt
_______ 42. Switches
________ 20. Heating Element
_______ 43. Transformer
________ 21. Hertz
_______ 44. Voltage
________ 22. Hot (such as Hot Wire)
_______ 45. Watt
________ 23. Inductor
_______ 46. Wiring
11
A) Used to connect electrical components to make a complete circuit.
B) A class of solid materials characterized by comparatively high resistance (Is used in diodes and
transistors).
C) Current carrying conductor at or near ground potential.
D) A current which flows in each direction for one half of each complete cycle.
E) A component that has two electrodes, one being a cathode and the other being the anode. It
allows current to flow in one direction.
F) The relationship of weight of one substance to another.
G) A device consisting of transformers and solid state devices to convert 12 VDC to 60 cycle
120VAC.
H) A term used to describe the maximum value of a sine wave.
I) An electric current protection device that can be reset.
J) A resistance material that when an electric current is applied with generate heat.
K) An electrical device to generate light.
L) An electrical component that offers resistance to the flow of current (has color coding bands on it).
M) The term of measurement for power consumption.
N) A very low resistance connection across an electrical circuit.
O) A rotating machine that converts mechanical energy into electrical energy.
P) Electric current that flows in one direction only.
Q) A unit of measurement for electric current.
R) The term used to indicate the number of cycles of electrical energy in a given period of time.
S) A complete path between the source energy (+) and (-), including any electrical components.
T) A process by which current is forced to flow in the reverse direction through a battery so that the
voltage potential of the battery can be built up.
U) A current protection device consisting of material that burns in two.
V) Voltage, other than neutral ground.
W) A circuit in which the component parts are connected end to end in a single path around the
circuit.
12
X) Origin of AC or DC power.
Y) A device or material having a high resistance used for supporting or separating conductors.
Z) An electric device, without moving part, that transfers electrical energy by electromagnetic
induction.
AA)
The pressure that makes current flow through the circuit.
BB)
Devices that close or open circuits.
CC)
The term used to indicate the amount of resistance measured.
DD)
The rate of doing work.
EE)
An electrical part that consists of two conducting surfaces separated from each other by an
insulating material.
FF)
A connection between an electric circuit and the earth or chassis.
GG)
An electromagnetic switch.
HH)
A unity composed of two or more cells that can be charged and discharged in use.
II)
A circuit in which the current does not flow.
JJ)
The number of complete cycles per unit of time.
KK)
When a relay operates this is the part that opens and closes )a part of the switches).
LL)
Any device that has a magnetic inertia which opposes any change or current.
MM)
The movement of electrons through a circuit.
NN)
A circuit in which the components are connected side by side.
OO)
The part of AC voltage which is equivalent to DC voltage.
PP)
The inductor used to filter out alternating current.
QQ)
Exterior, bath and kitchen outlets are connected to this type of circuit.
RR)
Any electrical device that consumes power could be considered a:
SS)
Electricity that is produced by pressure.
TT)
A device consisting of a transformer and solid state diodes for converting 120 VAC to 12 VDC.
13