Phase Sequence Indicator

Electrical Measurements

This set of Electrical Measurements & Measuring Instruments Multiple Choice Questions & Answers (MCQs) focuses on “Phase Sequence Indicator”.

1. Phase sequence indicator gives the maximum value of phase voltages.
a) True
b) False

2. Synchronization of A.C. supply means __________
a) different phase sequence
b) same phase sequence
c) zero phase
d) using a transformer

3. How many types of phase sequence indicators are there?
a) 1
b) 5
c) 2
d) 10

4. A rotating phase sequence indicator consists of ________
a) 1 coil
b) 2 coils
c) 5 coils
d) 3 coils

5. The three coils are ________
a) star connected
b) delta connected
c) not connected
d) shorted

6. Excitation of the three coils produces ________
a) a static magnetic field
b) a rotating magnetic field
c) a static electric field
d) a rotating electric field

7. Eddy e.m.f produces a torque.
a) True
b) False

8. Disc rotation is determined by ________
a) the supply voltage
b) an arrow
c) the turns ratio
d) the load current

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