ET 26202
Authored by Johnathan Swing
Professional Development
9th - 12th Grade
Used 45+ times
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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When are several motors permitted to be supplied by a single branch circuit?
the tap is at least 30' (9m) long
each motor is no larger than 1hp
it is part of a field fabricated assembly
the system voltage is greater than 1,000v
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Over what size motor needs an integral thermal protector to de-energize the motor?
100hp
500hp
1,000hp
1,500hp
Answer explanation
Level 2) pg. 127
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does NEC Article 430 cover?
the application and installation of luminaires
general information on grounding and bounding
provisions for transformers
the application and installation of motors
Answer explanation
Level 2) pg. 122
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate horsepower of a 12,000W DC motor?
12hp
14hp
16hp
25hp
Answer explanation
Horsepower= Watts/746
12,000/746= 16hp
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following DC motors is used to provide high starting torque and constant speed under load?
shunt
series
brushless
compound
Answer explanation
Level 2) pg. 71
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following occurs when a single-loop DC motor is placed in the neutral plane?
no torque is produced
the motors becomes self-starting
the commutator connects to the brushes
maximum torque is produced
Answer explanation
Level 2) pg. 62
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following motors is the BEST choice for providing excellent speed control?
shunt DC
split-phase AC
synchronous AC
series DC
Answer explanation
Level 2) pg. 70
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