CWEA E/I Level 3 With Complete Solutions.
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
D-not heat up
The NEC identifies environments that contain flammable vapors and gases as whi...
CWEA E/I Level 3 With Complete Solutions.
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
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
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
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
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
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
A-rarely needed
The advantage of LCDs over LEDs is:
A-accuracy
B-better visibility
C-lower power consumption
D-sensitivity
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.
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.
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.
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.
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
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.
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.
c. synchronous motor.
Modern synchronous motors have:
a. both brushes and slip rings.
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