NCC PRACTICE TEST 5 QUESTIONS WITH ACCURATE
ANSWERS
A buck-and-boost transformer has a primary current of 10A and the
transformation ratio of 10:1. What is the secondary current? correct answer 100A
A cable hanger elbow is used to correct answer suspend cables in long vertical
runs
A device that is used to step up generated voltage to make it suitable for
commercial transmission is called a correct answer power transformer
A die used to correct answer cut the threads in conduit
A downed power line is most likely to result in a correct answer phase failure
A pocket knife can be used to deburr correct answer PVC
A residence with 120V and 240V loads is likely to be served by a correct answer
single phase transformer with two secondaries
A right triangle is any triangle with correct answer one 90* angle
A three phase, four wire system that has the advantage of providing three-phase
power and allowing lighting to be connected between any of the secondary
phases and the neutral would have a correct answer wye secondary
, A transformer can be checked for shorted turns using a correct answer TTR tester
A transformer that has the secondary winding connected in series with the
primary at a junction terminal is an correct answer autotransformer
A triplen harmonics neutral current can be reduced by correct answer adding
harmonic filters at the load
A typical hand-crank wire puller, using 30 pounds of force, can pull up to correct
answer 1500 pounds
According to the NEC, neutral conductors size No. 6 and smaller must have a
continuous marking of white or correct answer gray
An ampacity adjustment of conductors in cable tray is more likely to be required
when installing correct answer multiconductor cable
An SSOLR initiates a trip if the phase currents exceed what percentage of the trip
current dial setting? correct answer 125%
Before starting a cable pull, make sure that correct answer all communications
equipment is in working order
Capacitors are covered in correct answer NEC Article 460
Circuit breaker ratings are given correct answer on the breaker nameplate
ANSWERS
A buck-and-boost transformer has a primary current of 10A and the
transformation ratio of 10:1. What is the secondary current? correct answer 100A
A cable hanger elbow is used to correct answer suspend cables in long vertical
runs
A device that is used to step up generated voltage to make it suitable for
commercial transmission is called a correct answer power transformer
A die used to correct answer cut the threads in conduit
A downed power line is most likely to result in a correct answer phase failure
A pocket knife can be used to deburr correct answer PVC
A residence with 120V and 240V loads is likely to be served by a correct answer
single phase transformer with two secondaries
A right triangle is any triangle with correct answer one 90* angle
A three phase, four wire system that has the advantage of providing three-phase
power and allowing lighting to be connected between any of the secondary
phases and the neutral would have a correct answer wye secondary
, A transformer can be checked for shorted turns using a correct answer TTR tester
A transformer that has the secondary winding connected in series with the
primary at a junction terminal is an correct answer autotransformer
A triplen harmonics neutral current can be reduced by correct answer adding
harmonic filters at the load
A typical hand-crank wire puller, using 30 pounds of force, can pull up to correct
answer 1500 pounds
According to the NEC, neutral conductors size No. 6 and smaller must have a
continuous marking of white or correct answer gray
An ampacity adjustment of conductors in cable tray is more likely to be required
when installing correct answer multiconductor cable
An SSOLR initiates a trip if the phase currents exceed what percentage of the trip
current dial setting? correct answer 125%
Before starting a cable pull, make sure that correct answer all communications
equipment is in working order
Capacitors are covered in correct answer NEC Article 460
Circuit breaker ratings are given correct answer on the breaker nameplate
