Download 2005 Residential Wireman Renewal Exam #1

2005 JOURNEYMAN RENEWAL EXAM #1 - QUESTIONS
1.
A lighting and appliance branch circuit is a branch circuit that has a
connection to the neutral of the panelboard and that has overcurrent protection
of:
a. 30 amperes or less in one or more conductors
b. 40 amperes or less in one or more conductors
c. 50 amperes or less in one or more conductors
d. 60 amperes or less in one or more conductors
2.
The continuity of the grounding conductor system for portable electrical
carnival equipment shall be verified:
a. And recorded on an annual basis.
b. And recorded on a quarterly basis.
c. And recorded on a monthly basis.
d. Each time the equipment is connected.
3.
The minimum size single-conductor medium voltage cable that may be
installed in cable tray is:
a. 1/0 AWG
b. 2/0 AWG
c. 3/0 AWG
d. 4/0 AWG
4.
A plate type grounding electrode shall be installed below the surface of the
earth not less than:
a. Twenty-four inches
b. Thirty inches
c. Thirty-six inches
d. Forty-eight inches
5.
Where a water pipe passes over an indoor motor control center, leak
protection apparatus shall have a minimum clearance of:
a. Six feet to the protection apparatus.
b. Six feet to the water pipe.
c. Six and one half feet to the protection apparatus.
d. Six and one half feet to the water pipe.
6.
The minimum size copper conductor allowed for connecting all parts of a
swimming pool common bonding grid shall be:
a. 8 AWG solid
b. 8 AWG stranded
c. 6 AWG solid
d. 6 AWG stranded
7.
An installation consisting of seven (7) non-jacketed 12 AWG Type MC
cables, each with three current carrying conductors, bundled together longer
than 24: shall have an adjustment factor of:
a. 45 percent
b. 50 percent
c. 60 percent
d. 70 percent
8.
The electrical supply equipment for a RV park back-in site shall be located on
the left side of the parked vehicle not more than:
a. Five feet from the left edge of the stand.
b. Seven feet from the left edge of the stand.
c. Fifteen feet from the left edge of the stand.
d. Thirty feet from the left edge of the stand
9.
Fire pump supply conductors on the load side of the final disconnecting means
and overcurrent device(s) are permitted to be routed through a building if:
a. Encased in at least 2” of brick.
b. Installed in conduits or raceways with lighting and power conductors.
c. Concealed within walls, floors, or ceilings that provide a thermal barrier of
material that has at least a 15-minute finish rating.
d. Installed in a listed electrical circuit protective system with a minimum 1hour fire rating.
10.
The maximum rating of the initial non-time delay fuse for the branch-circuit
short circuit protection of a 1 hp. 3 phase, 208-volt squirrel cage motor shall
be:
a. 6 amperes
b. 10 amperes
c. 15 amperes
d. 20 amperes
11.
The minimum rating for a service disconnecting means for a building, other
than a single family dwelling, consisting of three 2-wire circuits shall be:
a. 15 amperes
b. 30 amperes
c. 60 amperes
d. 100 amperes
12.
Unless listed and identified other, terminations and conductors of circuits
rated 100 amperes or larger shall be rated at:
a. 60 degrees C
b. 75 degrees C
c. 90 degrees C
d. 150 degrees C
13.
In other spaces used for environmental air-handling purposes other than ducts
or plenums, such as the space above a suspended ceiling, which of the wiring
methods is NOT allowed:
a. Type MC cable without an overall nonmetallic covering.
b. Flexible Metal Conduit
c. Rigid Metal Conduit without an overall nonmetallic covering.
d. Liquidtight Flexible Metal Conduit.
14.
The minimum size copper equipment bonding jumper on the supply side of a
service consisting of parallel copper phase conductors with a total circular mil
area of 2000 kcmil shall be:
a. 2/0 AWG
b. 3/0 AWG
c. 4/0 AWG
d. 250 kcmil
15.
Where a feeder supplies continuous loads or any combination of continuous
and non-continuous loads, the rating of the overcurrent device shall not be less
than the non-continuous loads plus:
a. Eighty percent of the continuous load.
b. One hundred percent of the continuous load.
c. One hundred twenty-five percent of the continuous load.
d. One hundred fifty percent of the continuous load.
16.
For Class III equipment that is not subject to overloading, the maximum
surface temperature under operating conditions shall not exceed:
a. 120 degrees C
b. 165 degrees C
c. 190 degrees C
d. 210 degrees C
17.
Each commercial building and each commercial occupancy accessible to
pedestrians shall be provided with at least one outlet in an accessible location
at each entrance to each tenant space for sign or outline lighting system use.
The outlet(s) shall be supplied by a branch circuit that supplies no other
load(s) and a minimum rating of:
a. 15 amperes
b. 20 amperes
c. 30 amperes
d. 40 amperes
18.
Transient voltage surge suppressors may be installed on circuits of up to:
a. 150 volts
b. 300 volts
c. 600 volts
d. 1000 volts
19.
Primary overcurrent devices, impedance limiting means, or other inherent
protective means shall be permitted to protect a motor control circuit
transformer where such transformer is rated.:
a. 50 VA or less.
b. 75 VA or less
c. 100 VA or less.
d. 150 VA or less.
20.
Where the supplemental electrode is a rod, pipe or plate, that portion of the
bonding jumper that is the sole connection to the supplemental grounding
electrode shall not be required to be larger than:
a. 8 AWG copper, 6 AWG aluminum.
b. 6 AWG copper, 4 AWG aluminum.
c. 4 AWG copper, 2 AWG aluminum.
d. 2 AWG copper, 1 AWG aluminum.
2005 JOURNEYMAN RENEWAL EXAM #1 – ANSWERS
1.
a 408.14
2.
d 525.32
3.
a 392.3 (B) (2), 392.3 (B) (1)
4.
b 250.53 (H)
5.
a 110.26 (F) (1) (a) (b)
6.
a 680.26 (C) (3)
7.
c 310.15 (B) (2) (a) Ex. 5 Seven non-jacketed 12 AWG Type MC cables,
each with the three current carrying conductors would be a total of 21 current
carrying conductors. If they are bundled longer than 24 inches without
maintaining spacing, a 60 percent adjustment factor shall be applied.
8.
b 285.21 (A) (1)
9.
d 402.5, Table 402.5
10.
c Table 430.150, Table 430.52, 430.52 (C) Ex. 1, 240.6 The FLC or a 1 hp,
3 phase, 208-volt squirrel cage motor is 4.6 amps (Table 430.150). This is
multiplied by 300% (Table 430.52) which equals 13.8 amps. You are allowed
to increase this to the next higher standard ampere rating (430.52 (C) (1) Ex.
1) which would be 15 amps (240.6). Note: The question asks for initial
maximum rating of the non-time delay fuse. Where the rating specified in
Table 430.52 (C) (1) Ex. 1 is not sufficient for the starting current f the motor
the rating or a non-time delay fuse not exceeding 600 amperes shall be
permitted to be increased but shall in no case exceed 400% of the FLC
(430.52 (C) (1) Ex. 2). For example, 4.6A x 400% = 18.4A because the rating
cannot exceed 400%. You would go to the next lower standard rating which
would be 15A.
11.
c 230.79 (D)
12.
b 110.14 (C) (1) (b) Technically, this question should have said
“terminations and conductors or circuits rated over 100 amperes”. 100
amperes is not included in 75oC rating. The 60oC rating is applied to 100
amperes or less. (110.14 (C) (1) (a)) However, this is normally raised to the
75oC rating because new equipment is rated at 75 oC. (110.14 (c) (1) (a) (3))
This is assuming the conductors are rated at least 75oC.
13.
d 300.22 (C) (1)
14.
d 250.102 (C), Table 250.66 250.102 (C) states that equipment bonding
jumpers located on the supply side of the service are sized to Table 250.66.
Where the equivalent area of the service conductors exceeds the Table (1100
kcmil copper), which 2000 kcmil does, the bonding jumper must be at least
12.5% of this area. 2000 kcmil x 12.5% = 250 kcmil.
15.
c 215.2 (A) (1)
16.
b 503.1
17.
b 600.5 (A)
18.
c 285.3 (1)
19.
a 430.72 (C) (3)
20.
b 250.66 (A)