ELECTRICAL LEVEL 2 MODULE 1
ALTERNATING CURRENT FINAL
COMPREHENSIVE ASSESSMENT TEST
PAPER QUESTIONS AND SOLUTIONS
⩥ Which of the following occurs when the load applied causes
the fibers on the tension side of the rung to stretch and
permanently deform? - M7.
Answer: Transverse Failure
⩥ Which of the following is an NEC® requirement for
grounding and bonding cable tray installations? - M7.
Answer: Steel or aluminum trays may be used as equipment
grounding conductors.
⩥ Which of the following provides a curved surface for the
cable to follow as it passes from the tray? - M7.
Answer: Dropout Plate
⩥ A cable hanger elbow is used to ______ - M7.
Answer: suspend cables in long vertical runs
,⩥ When installing single conductor cables in tray systems with
conductors size 4/0 and larger, they must be ______ - M7.
Answer: Installed in a single layer
⩥ The most desirable method of exiting cable from a cable tray
is ________ - M7.
Answer: between rungs or from the end of the tray using a
dropout plate
⩥ Welding cable may only be installed in a _________ - M7.
Answer: dedicated cable tray
⩥ In short vertical runs, the cables are usually supported by
________ - M7.
Answer: vertical riser elbow
⩥ What kind of mounting is often used in tunnels and other
underground installations where equipment is separated by long
distances? - M7.
Answer: Wall mounting
,⩥ Symbols used to show cable tray systems on working
drawings are explained in the ________ - M7.
Answer: Legend
⩥ The method of supporting cable trays using threaded rods and
hanger clamps is known as _______ - M7.
Answer: Direct rod suspension
⩥ Given a cable tray that is available in standard widths of 6, 12,
18, 24, and 36 inches, what is the minimum width of a 3-inch
deep cable tray used for the following cables that are all 4/0 or
larger: two with 1.5-inch diameter; three with 1.75-inch
diameter; and two with 2.5-inch diameter? - M7.
Answer: = (2 x 1.5)
= (3 x 1.75)
= (2 x 2.25)
3 + 5.25 + 5 = 13.25
18 Inches
Round up to next closest
, ⩥ An ampacity adjustment of conductors in cable tray is more
likely to be required when installing __________ - M7.
Answer: multiconductor cable
⩥ The expected weight of an installed cable tray system is 300
pounds. Each support must be capable of carrying - M7.
Answer: 300 lbs x 1.25 -> multiplier
= 375 lbs
⩥ To properly install heat-shrink insulators, ________ - M8.
Answer: Slip the insulator over the connector and apply heat for
a few seconds
⩥ When used in control cable, which of the following must be
grounded in order to be effective? - M8.
Answer: Drain wires
⩥ To determine the correct connector size for MC cable,
_________ - M8.
ALTERNATING CURRENT FINAL
COMPREHENSIVE ASSESSMENT TEST
PAPER QUESTIONS AND SOLUTIONS
⩥ Which of the following occurs when the load applied causes
the fibers on the tension side of the rung to stretch and
permanently deform? - M7.
Answer: Transverse Failure
⩥ Which of the following is an NEC® requirement for
grounding and bonding cable tray installations? - M7.
Answer: Steel or aluminum trays may be used as equipment
grounding conductors.
⩥ Which of the following provides a curved surface for the
cable to follow as it passes from the tray? - M7.
Answer: Dropout Plate
⩥ A cable hanger elbow is used to ______ - M7.
Answer: suspend cables in long vertical runs
,⩥ When installing single conductor cables in tray systems with
conductors size 4/0 and larger, they must be ______ - M7.
Answer: Installed in a single layer
⩥ The most desirable method of exiting cable from a cable tray
is ________ - M7.
Answer: between rungs or from the end of the tray using a
dropout plate
⩥ Welding cable may only be installed in a _________ - M7.
Answer: dedicated cable tray
⩥ In short vertical runs, the cables are usually supported by
________ - M7.
Answer: vertical riser elbow
⩥ What kind of mounting is often used in tunnels and other
underground installations where equipment is separated by long
distances? - M7.
Answer: Wall mounting
,⩥ Symbols used to show cable tray systems on working
drawings are explained in the ________ - M7.
Answer: Legend
⩥ The method of supporting cable trays using threaded rods and
hanger clamps is known as _______ - M7.
Answer: Direct rod suspension
⩥ Given a cable tray that is available in standard widths of 6, 12,
18, 24, and 36 inches, what is the minimum width of a 3-inch
deep cable tray used for the following cables that are all 4/0 or
larger: two with 1.5-inch diameter; three with 1.75-inch
diameter; and two with 2.5-inch diameter? - M7.
Answer: = (2 x 1.5)
= (3 x 1.75)
= (2 x 2.25)
3 + 5.25 + 5 = 13.25
18 Inches
Round up to next closest
, ⩥ An ampacity adjustment of conductors in cable tray is more
likely to be required when installing __________ - M7.
Answer: multiconductor cable
⩥ The expected weight of an installed cable tray system is 300
pounds. Each support must be capable of carrying - M7.
Answer: 300 lbs x 1.25 -> multiplier
= 375 lbs
⩥ To properly install heat-shrink insulators, ________ - M8.
Answer: Slip the insulator over the connector and apply heat for
a few seconds
⩥ When used in control cable, which of the following must be
grounded in order to be effective? - M8.
Answer: Drain wires
⩥ To determine the correct connector size for MC cable,
_________ - M8.
