141 S2A

141 S2A

Professional Development

10 Qs

quiz-placeholder

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141 S2A

141 S2A

Assessment

Quiz

Specialty

Professional Development

Medium

Created by

Rizwan Rizwan

Used 2+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In the synchronous speed formula, what does "Frequency" represent?
A) The number of motor poles
B) The motor's rated voltage
C) The power factor of the motor
D) The supply frequency in Hertz (Hz)

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many poles does a 3-phase AC induction motor typically have?
A) 1 pole
B) 2 poles
C) 3 poles
D) The number of poles can vary depending on the motor design

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If a 3-phase motor has 4 poles and is connected to a 60 Hz power supply, what is its synchronous speed (Ns)?
A) 1500 RPM
B) 1800 RPM
C) 3600 RPM
D) 4800 RPM

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the relationship between the actual motor speed (N) and the synchronous speed (Ns) of a 3-phase AC induction motor?
A) N = Ns - 120
B) N = Ns + 120
C) N = Ns / 120
D) N = Ns x 120

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If a 3-phase motor has a synchronous speed (Ns) of 900 RPM and is running at an actual speed (N) of 850 RPM, what is its slip?
A) 0.05
B) 0.1
C) 0.15
D) 0.20

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What does the term "slip" refer to in the context of 3-phase AC induction motors?
A) The rotational speed of the motor
B) The difference between synchronous speed and actual speed
C) The number of motor poles
D) The motor's power factor

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

If a 3-phase motor has a synchronous speed (Ns) of 1200 RPM and is running at an actual speed (N) of 1120 RPM, what is its slip percentage?
A) 4%
B) 6%
C) 8%
D) 10%

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