CWEA E (I) Level 3 Exam Questions with Verified Answers.
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Course
CWEA E Level 3
Institution
CWEA E Level 3
CWEA E (I) Level 3 Exam Questions with Verified Answers.CWEA E (I) Level 3 Exam Questions with Verified Answers.CWEA E (I) Level 3 Exam Questions with Verified Answers.
CWEA E (I) Level 3 Exam Questions with Verified
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-me ohmmeter
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 millimeter has:
A. analog/digital circuits.
B. microprocessor circuitry.
C. opposing coils and a commentator.
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.
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