Electrical NCCER test
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the secondary full load
amperage? - Correct Answer
A 1500 KVA three-phase transformer has a secondary voltage of 480/277. What is the secondary full load amperage
- Correct Answer
A conductor with 220 mils of insulation would have insulation thickness of: - Correct Answer 0.22"
A current transformer has a rating of 4000:5. If 2000 amps load is on the primary, the secondary output would
produce: - Correct Answer 2.5 amps
A lightning outlet symbol in the shape of a circle indicated a: - Correct Answer incandescent fixture
A material with poor electrical conducting properties is a good - Correct Answer insulator
A megohmmeter will be used to check a cable. The electrician MUST be sure that the circuit is - Correct Answer de-
energized and locked, tagged out, and tested.
A protective device for limiting voltage spikes by discharging or bypassing surge current is called a: - Correct Answer
surge limiter
A UL listed rod type grounding electrode must have a minimum length of: - Correct Answer 8'
A voltage source of a circuit provides 240 volts and draws 48 amps. How much resistance is in the circuit? - Correct
Answer 5 ohms
ALL multimeters are capable of measuring: - Correct Answer current, voltage, and resistance
All of the following are common service voltages in the United States Except: - Correct Answer 372/575 three-phase,
four-wire
An auxiliary holding contact (seal-in) on a NEMA starter is indicated by the terminal marking: - Correct Answer A1 &
A2
An electrician that attempts to install or remove energized fuses will be exposed to the risk of an electrical shock and
an electrical: - Correct Answer arc.
An insulator resistance tester is also known as a: - Correct Answer megohmeter
Applications for heat tracing systems with self regulating control include those requiring a narrow operating range
and: - Correct Answer temperature sensitive fluids
As the ambient temperature surrounding a self-regulating heating cable gets warmer, the resistance: - Correct
Answer decreases slightly
As the load decreases on a squirrel cage induction motor, its power factor: - Correct Answer increases
As the mechanical load increases on a squirrel cage induction motor: - Correct Answer torque decreases and stator
current increases
Eight incandescent lightning fixtures are to be installed. Each fixture is 120 volts, with a 200-watt lamp. What is the
total connected load? - Correct Answer 13.3 amps
Electrical gloves should be inspected before each use to determine: - Correct Answer the maximum voltage they can
stand
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the secondary full load
amperage? - Correct Answer
A 1500 KVA three-phase transformer has a secondary voltage of 480/277. What is the secondary full load amperage
- Correct Answer
A conductor with 220 mils of insulation would have insulation thickness of: - Correct Answer 0.22"
A current transformer has a rating of 4000:5. If 2000 amps load is on the primary, the secondary output would
produce: - Correct Answer 2.5 amps
A lightning outlet symbol in the shape of a circle indicated a: - Correct Answer incandescent fixture
A material with poor electrical conducting properties is a good - Correct Answer insulator
A megohmmeter will be used to check a cable. The electrician MUST be sure that the circuit is - Correct Answer de-
energized and locked, tagged out, and tested.
A protective device for limiting voltage spikes by discharging or bypassing surge current is called a: - Correct Answer
surge limiter
A UL listed rod type grounding electrode must have a minimum length of: - Correct Answer 8'
A voltage source of a circuit provides 240 volts and draws 48 amps. How much resistance is in the circuit? - Correct
Answer 5 ohms
ALL multimeters are capable of measuring: - Correct Answer current, voltage, and resistance
All of the following are common service voltages in the United States Except: - Correct Answer 372/575 three-phase,
four-wire
An auxiliary holding contact (seal-in) on a NEMA starter is indicated by the terminal marking: - Correct Answer A1 &
A2
An electrician that attempts to install or remove energized fuses will be exposed to the risk of an electrical shock and
an electrical: - Correct Answer arc.
An insulator resistance tester is also known as a: - Correct Answer megohmeter
Applications for heat tracing systems with self regulating control include those requiring a narrow operating range
and: - Correct Answer temperature sensitive fluids
As the ambient temperature surrounding a self-regulating heating cable gets warmer, the resistance: - Correct
Answer decreases slightly
As the load decreases on a squirrel cage induction motor, its power factor: - Correct Answer increases
As the mechanical load increases on a squirrel cage induction motor: - Correct Answer torque decreases and stator
current increases
Eight incandescent lightning fixtures are to be installed. Each fixture is 120 volts, with a 200-watt lamp. What is the
total connected load? - Correct Answer 13.3 amps
Electrical gloves should be inspected before each use to determine: - Correct Answer the maximum voltage they can
stand
