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.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICAIDSTORE. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
