CWEA E/I Level 3 Exam Test Questions with Answers Graded A
If the potential difference across the coil is low, D-Current carrying ability - ANSWER -D-
the coil will: Current carrying ability
A-draw too much current
B-become too hot
C-Produce too much magnetic force
D-not heat up - ANSWER -D-not heat up He push to test pilot light is used in applications
where the pilot light is:
A-rarely needed
B-A neon bulb
The NEC identifies environments that contain C-used in DC applications
flammable vapors and gases as which class of D-in constant use - ANSWER -A-rarely
hazardous location? needed
A-Class I
B-Class II
C-Class III
D-Class IV - ANSWER -A-Class I The advantage of LCDs over LEDs is:
A-accuracy
B-better visibility
C-lower power consumption
Which of the following reduces high voltages and D-sensitivity - ANSWER -C-lower power
currents to save values for measurements? consumption
A-auto transformer
B-megohmmeter
C-instrument transformer
D-variable transformer - ANSWER -C- Shielding protects an analog meter from:
instrument transformer a. damage due to careless handling.
b. harmful UV rays.
c. over-current and surges.
d. stray magnetic fields. - ANSWER -d.
In a three wire control circuit, when a power stray magnetic fields.
failure occurs:
A-The interlock contact will close the circuit
B-The operator can restart the meter
automatically An ammeter should be connected:
C-The motor can restart unexpectedly a. across the line.
D-The operator must restart the meter manually - b. around an inductor.
ANSWER -D-The operator must restart the c. in parallel with the load.
meter manually d. in series with the load. - ANSWER -d. in
series with the load.
Push buttons are classified as standard duty or
heavy duty according to the: Bar graphs and wave forms can be displayed on
A-Kind of enclosure a LCD screen when the multimeter has:
B-Service conditions a. analog/digital circuits.
C-frequency operation b. microprocessor circuitry.
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, CWEA E/I Level 3 Exam Test Questions with Answers Graded A
c. opposing coils and a commutator. a. both brushes and slip rings.
d. parallel ports. - ANSWER -b. b. brushes, but no slip rings.
microprocessor circuitry. c. slip rings, but no brushes.
d. neither brushes nor slip rings. -
ANSWER -d. neither brushes nor slip rings.
The difference between the squirrel-cage
rotor and the wound rotor is in:
a. their pole-phase groups. All the following are true of 240-volt systems
b. how the conductors are connected. compared to 480-volt systems, except:
c. how the current is induced in the conductors. a. they cost more to operate.
d. all of the above. - ANSWER -b. how the b. they require more current per unit
conductors are connected. of power.
c. they require smaller circuit breakers.
d. they are safer. - ANSWER -c. they
require smaller circuit breakers.
The frame, the core, the winding, and the end
plates are all parts of the:
a. rotor.
b. stator. If a charged capacitor is removed from a circuit,
c. alternator. the capacitor:
d. induction motor - ANSWER -b. stator. a. retains its charge.
b. loses some of its charge.
c. loses most of its charge.
d. loses all of its charge. - ANSWER -a.
Which of the following is a sign of overheating retains its charge.
rotor bars?
a. Reduced starting torque.
b. Noise.
c. Discoloration. Control systems are usually designed so that
d. All of the above. - ANSWER -c. each individual circuit controls:
Discoloration. a. all functions of the machine.
b. at least two functions.
c. only one function.
d. only one device. - ANSWER -c. only one
Two sources of power, one AC and one DC, are function.
required for running a(n):
a. induction motor.
b. squirrel-cage motor.
c. synchronous motor. A 115-volt, 2-KVA, single-phase generator
d. wound-rotor motor. - ANSWER -c. operating at full load will deliver how many
synchronous motor. amperes?
a. 0.23
b. 17.4
c. 57.5
Modern synchronous motors have: d. 230 - ANSWER -b. 17.4
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If the potential difference across the coil is low, D-Current carrying ability - ANSWER -D-
the coil will: Current carrying ability
A-draw too much current
B-become too hot
C-Produce too much magnetic force
D-not heat up - ANSWER -D-not heat up He push to test pilot light is used in applications
where the pilot light is:
A-rarely needed
B-A neon bulb
The NEC identifies environments that contain C-used in DC applications
flammable vapors and gases as which class of D-in constant use - ANSWER -A-rarely
hazardous location? needed
A-Class I
B-Class II
C-Class III
D-Class IV - ANSWER -A-Class I The advantage of LCDs over LEDs is:
A-accuracy
B-better visibility
C-lower power consumption
Which of the following reduces high voltages and D-sensitivity - ANSWER -C-lower power
currents to save values for measurements? consumption
A-auto transformer
B-megohmmeter
C-instrument transformer
D-variable transformer - ANSWER -C- Shielding protects an analog meter from:
instrument transformer a. damage due to careless handling.
b. harmful UV rays.
c. over-current and surges.
d. stray magnetic fields. - ANSWER -d.
In a three wire control circuit, when a power stray magnetic fields.
failure occurs:
A-The interlock contact will close the circuit
B-The operator can restart the meter
automatically An ammeter should be connected:
C-The motor can restart unexpectedly a. across the line.
D-The operator must restart the meter manually - b. around an inductor.
ANSWER -D-The operator must restart the c. in parallel with the load.
meter manually d. in series with the load. - ANSWER -d. in
series with the load.
Push buttons are classified as standard duty or
heavy duty according to the: Bar graphs and wave forms can be displayed on
A-Kind of enclosure a LCD screen when the multimeter has:
B-Service conditions a. analog/digital circuits.
C-frequency operation b. microprocessor circuitry.
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, CWEA E/I Level 3 Exam Test Questions with Answers Graded A
c. opposing coils and a commutator. a. both brushes and slip rings.
d. parallel ports. - ANSWER -b. b. brushes, but no slip rings.
microprocessor circuitry. c. slip rings, but no brushes.
d. neither brushes nor slip rings. -
ANSWER -d. neither brushes nor slip rings.
The difference between the squirrel-cage
rotor and the wound rotor is in:
a. their pole-phase groups. All the following are true of 240-volt systems
b. how the conductors are connected. compared to 480-volt systems, except:
c. how the current is induced in the conductors. a. they cost more to operate.
d. all of the above. - ANSWER -b. how the b. they require more current per unit
conductors are connected. of power.
c. they require smaller circuit breakers.
d. they are safer. - ANSWER -c. they
require smaller circuit breakers.
The frame, the core, the winding, and the end
plates are all parts of the:
a. rotor.
b. stator. If a charged capacitor is removed from a circuit,
c. alternator. the capacitor:
d. induction motor - ANSWER -b. stator. a. retains its charge.
b. loses some of its charge.
c. loses most of its charge.
d. loses all of its charge. - ANSWER -a.
Which of the following is a sign of overheating retains its charge.
rotor bars?
a. Reduced starting torque.
b. Noise.
c. Discoloration. Control systems are usually designed so that
d. All of the above. - ANSWER -c. each individual circuit controls:
Discoloration. a. all functions of the machine.
b. at least two functions.
c. only one function.
d. only one device. - ANSWER -c. only one
Two sources of power, one AC and one DC, are function.
required for running a(n):
a. induction motor.
b. squirrel-cage motor.
c. synchronous motor. A 115-volt, 2-KVA, single-phase generator
d. wound-rotor motor. - ANSWER -c. operating at full load will deliver how many
synchronous motor. amperes?
a. 0.23
b. 17.4
c. 57.5
Modern synchronous motors have: d. 230 - ANSWER -b. 17.4
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