CWEA E/I Level 3 Test Practice | 50 Questions
with 100% Correct Answers
If the potential difference across the coil is low, the coil will:
A-draw too much current
B-become too hot
C-Produce too much magnetic force
D-not heat up Correct Answer: D-not heat up
The NEC identifies environments that contain flammable vapors and gases as which class of
hazardous location?
A-Class I
B-Class II
C-Class III
D-Class IV Correct Answer: A-Class I
Which of the following reduces high voltages and currents to save values for measurements?
A-auto transformer
B-megohmmeter
C-instrument transformer
D-variable transformer Correct Answer: C-instrument transformer
In a three wire control circuit, when a power failure occurs:
A-The interlock contact will close the circuit
B-The operator can restart the meter automatically
C-The motor can restart unexpectedly
D-The operator must restart the meter manually Correct Answer: D-The operator must restart
the meter manually
Push buttons are classified as standard duty or heavy duty according to the:
A-Kind of enclosure
B-Service conditions
C-frequency operation
D-Current carrying ability Correct Answer: D-Current carrying ability
He push to test pilot light is used in applications where the pilot light is:
A-rarely needed
B-A neon bulb
C-used in DC applications
D-in constant use Correct Answer: A-rarely needed
The advantage of LCDs over LEDs is:
A-accuracy
B-better visibility
C-lower power consumption
, D-sensitivity Correct Answer: C-lower power consumption
Shielding protects an analog meter from:
a. damage due to careless handling.
b. harmful UV rays.
c. over-current and surges.
d. stray magnetic fields. Correct Answer: d. stray magnetic fields.
An ammeter should be connected:
a. across the line.
b. around an inductor.
c. in parallel with the load.
d. in series with the load. Correct Answer: d. in series with the load.
Bar graphs and wave forms can be displayed on a LCD screen when the multimeter has:
a. analog/digital circuits.
b. microprocessor circuitry.
c. opposing coils and a commutator.
d. parallel ports. Correct Answer: b. microprocessor circuitry.
The difference between the squirrel-cage
rotor and the wound rotor is in:
a. their pole-phase groups.
b. how the conductors are connected.
c. how the current is induced in the conductors.
d. all of the above. Correct Answer: b. how the conductors are connected.
The frame, the core, the winding, and the end plates are all parts of the:
a. rotor.
b. stator.
c. alternator.
d. induction motor Correct Answer: b. stator.
Which of the following is a sign of overheating rotor bars?
a. Reduced starting torque.
b. Noise.
c. Discoloration.
d. All of the above. Correct Answer: c. Discoloration.
Two sources of power, one AC and one DC, are required for running a(n):
a. induction motor.
b. squirrel-cage motor.
c. synchronous motor.
d. wound-rotor motor. Correct Answer: c. synchronous motor.
Modern synchronous motors have:
with 100% Correct Answers
If the potential difference across the coil is low, the coil will:
A-draw too much current
B-become too hot
C-Produce too much magnetic force
D-not heat up Correct Answer: D-not heat up
The NEC identifies environments that contain flammable vapors and gases as which class of
hazardous location?
A-Class I
B-Class II
C-Class III
D-Class IV Correct Answer: A-Class I
Which of the following reduces high voltages and currents to save values for measurements?
A-auto transformer
B-megohmmeter
C-instrument transformer
D-variable transformer Correct Answer: C-instrument transformer
In a three wire control circuit, when a power failure occurs:
A-The interlock contact will close the circuit
B-The operator can restart the meter automatically
C-The motor can restart unexpectedly
D-The operator must restart the meter manually Correct Answer: D-The operator must restart
the meter manually
Push buttons are classified as standard duty or heavy duty according to the:
A-Kind of enclosure
B-Service conditions
C-frequency operation
D-Current carrying ability Correct Answer: D-Current carrying ability
He push to test pilot light is used in applications where the pilot light is:
A-rarely needed
B-A neon bulb
C-used in DC applications
D-in constant use Correct Answer: A-rarely needed
The advantage of LCDs over LEDs is:
A-accuracy
B-better visibility
C-lower power consumption
, D-sensitivity Correct Answer: C-lower power consumption
Shielding protects an analog meter from:
a. damage due to careless handling.
b. harmful UV rays.
c. over-current and surges.
d. stray magnetic fields. Correct Answer: d. stray magnetic fields.
An ammeter should be connected:
a. across the line.
b. around an inductor.
c. in parallel with the load.
d. in series with the load. Correct Answer: d. in series with the load.
Bar graphs and wave forms can be displayed on a LCD screen when the multimeter has:
a. analog/digital circuits.
b. microprocessor circuitry.
c. opposing coils and a commutator.
d. parallel ports. Correct Answer: b. microprocessor circuitry.
The difference between the squirrel-cage
rotor and the wound rotor is in:
a. their pole-phase groups.
b. how the conductors are connected.
c. how the current is induced in the conductors.
d. all of the above. Correct Answer: b. how the conductors are connected.
The frame, the core, the winding, and the end plates are all parts of the:
a. rotor.
b. stator.
c. alternator.
d. induction motor Correct Answer: b. stator.
Which of the following is a sign of overheating rotor bars?
a. Reduced starting torque.
b. Noise.
c. Discoloration.
d. All of the above. Correct Answer: c. Discoloration.
Two sources of power, one AC and one DC, are required for running a(n):
a. induction motor.
b. squirrel-cage motor.
c. synchronous motor.
d. wound-rotor motor. Correct Answer: c. synchronous motor.
Modern synchronous motors have:
