3 Phase motors
Authored by Andrew Oliphant
Professional Development
Professional Development
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Slip speed is the difference between:
standstill & rotor speed
rotor and stalling speed
synchronous & rotor speed
synchronous and standstill speed
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The voltage applied to a winding of a Delta connected 3 phase motor is:
240V
415V
240A
415A
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The voltage applied to a single winding of a star connected motor is;
240V
240A
415V
400A
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The load type that causes the current to lead the voltage in a Sine wave is:
Inductive
Capacitive
Resistive
Amphibious
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Electric motors operate due to the effect of:
The visible light spectrum
Mutual recognition
Simple circuits
Mutual induction
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a 3 phase motor has a synchronous speed of 750rpm when connected to a 50Hz supply, determine the number of poles?
2
8
6
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Electric motors consume up to 7 times running current upon
slowing
dyno magnetic braking
start-up
reduced rpm
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