Wound Rotor Design MCQs : This section focuses on the "Wound Rotor Design". These Multiple Choice Questions (MCQs) should be practiced to improve the Wound Rotor Design skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
How many types of design of wound rotors are available?
A. 2
B. 3
C. 4
D. 5
Question 2
How should the number of slots be in the case of fractional slot windings?
A. multiples of slots
B. multiple of phases
C. multiple of phases and pair of poles
D. multiples of pair of poles
Question 3
How should the rotor voltage be with respect to the high voltage and large machines?
A. low
B. moderate
C. high
D. very high
Question 4
The rotor voltage on open circuit between slip rings should not exceed 500 V for small machines.
A. true
B. false
Question 5
The value of the current density of rotor is chosen almost equal to that in the stator.
A. true
B. false
Question 6
What is the formula for rotor turns per phase?
A. rotor turns per phase = (winding factor for stator/winding factor for rotor) * (Rotor voltage per phase/Stator voltage per phase) * Number of turns per phase for stator
B. rotor turns per phase = (winding factor for stator/winding factor for rotor) / (Rotor voltage per phase/Stator voltage per phase) * Number of turns per phase for stator
C. rotor turns per phase = (winding factor for stator/winding factor for rotor) * (Rotor voltage per phase/Stator voltage per phase) / Number of turns per phase for stator
D. rotor turns per phase = (winding factor for stator/winding factor for rotor) / (Rotor voltage per phase/Stator voltage per phase) / Number of turns per phase for stator
Question 7
What is the formula for the full load rotor mmf?
A. 65% of stator mmf
B. 75% of stator mmf
C. 85% of stator mmf
D. 90% of stator mmf
Question 8
What is the range of the rotor voltage for the large machines?
A. 1000-1500 V
B. 1000-1750 V
C. 500-1500 V
D. 1000-2000 V
Question 9
What is the rotor windings for wound rotor motors?
A. single phase windings
B. double phase windings
C. three phase windings
D. concentrated phase windings
Question 10
What should be done to keep the rotor voltage to an acceptable level?
A. rotor to stator turns must be properly adjusted
B. stator to rotor turns must be properly adjusted
C. stator turns must be adjusted
D. rotor turns must be adjusted
Question 11
What type of conductor is chosen for the small motors?
A. round
B. bar
C. skewed
D. rectangular
Question 12
What type of winding is made use of for the large motors?
A. mush windings
B. bar type windings
C. cross windings
D. rounded windings
Question 13
What type of winding is made use of for the small motors?
A. mush windings
B. cross windings
C. interconnected windings
D. rounded windings