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California Electrician Test Preparation


Quiz Number:  No. 11
Teacher:  Gerald Newton
Teacher's Home Page:  http://www.electrician2.com
Teacher's Email:  electrician@electrician2.com

No. of Questions= 20


1.  For dwelling unit with a 240/120 single-phase service the frame of a 4,500 watt 240/120 volt clothes dryer shall be grounded by using the grounding conductor.  The minimum size copper conductor is:
            
a) No. 10
b) No. 8
c) No. 12
2.  The minimum size copper equipment grounding conductor for a 200-ampere circuit is:
            
a) No. 8
b) No. 6
c) No. 3
3.  When not under concrete, rigid metal conduit must be buried under public highways and streets at least:
            
a) 24 inches
b) 18 inches
c) 6 inches
d) 4 inches
4.  120-volt, 20-ampere GFCI protected residential branch circuit may be buried at a minimum depth of :
            
a) 12 inches
b) 18 inches
c) 24 inches
5.  The listed ampacities of 75 Degrees C. conductors in a raceway must be reduced when the ambient air temperature exceeds:
            
a) 60 degrees C.
b) 75 degrees C.
c) 90 degrees C.
d) 30 degrees C.
6.  Horizontal nonmetallic wireways shall be supported where run horizontally at intervals not to exceed  _________, and at each end or joint, unless listed for other support intervals. In no case shall the distance between supports exceed 3 m (10 ft).
            
a) 3 ft.
b) 5 ft.
c) 6 ft.
7.  When NOT using a one-shot bender, the minimum radius of  a field bend to the centerline of the conduit for 2-inch rigid metal conduit containing XHHW conductors is:
            
a) 9 1/2 inches
b) 12 inches
c) 15 inches
8.  In a straight run, 2-inch rigid metal conduit with threaded couplings may be supported at intervals not exceeding:
            
a) 10 feet
b) 12 feet
c) 16 feet
9.  The maximum size of electrical metallic tubing is:
            
a) 6-inch
b) 4-inch
c) 2-inch
10.  For metallic and nonmetallic, auxiliary gutters must not be filled to greater than:
            
a) 20 %
b) 30 %
c) 40 %
d) 60 %
11.  The multiplier for bending offsets is called the ________ of the angle used for the offset bends.
     
a) sine
b) cosine
c) secant
d) cosecant
12.  The largest conductor allowed in a standard box without other restrictions is:
            
a) No. 4
b) No. 8
c) No. 6
13.  An Alternating-Current or Direct-Current General-Use Snap Switch may control what inductive load as a percentage of its ampere rating?
            
a) 80 %
b) 50 %
c) 75 %
14.  The ampacity of No. 14 fixture wire is:
            
a) 8 amperes
b) 15 amperes
c) 17 amperes
15.  When there are exposed live parts on both sides of the working space for a system operating at 480 volts the required distance between the equipment is:
            
a) 3 feet
b) 3 1/2 feet
c) 4 feet
16.  Guarding by elevation for a 600-volt circuit requires an elevation of:
            
a) 8 feet
b) 6 1/4 feet
c) 8 1/2 feet
17.  Conduit or fittings must not rise into the bottom of a switchboard enclosure more than:
            
a) 8 inches
b) 3 inches
c) 10 inches
18.  Plug-in-type overcurrent protection devices that are backfed and used to terminate field-installed ungrounded supply conductors ________________ .
            
a) are permitted if locked in place
b) shall be secured in place by an additional fastener that requires other than a pull to release the device from the mounting means on the panel.
c) do not require any additional hardware
19.  For a center line radius of 20 inches and a 45 degree bend the developed length of the conduit is found by using the following formula:
     
a) dl = 20 x 90 x 0.0175.
b) dl = 20 x 45 x 0.0175.
c) dl = 20 x 90 x tangent of 45 degrees
20.  For a center line radius of 20 inches and a 90 degree bend the gain is:
     
a) 8.5 inches
b) 6 inches
c) 4.125 inches



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