Dc Machines Aptitude Test Online Exam Quiz
Dc Machines Aptitude Test GK Quiz. Question and Answers related to Dc Machines Aptitude Test. MCQ (Multiple Choice Questions with answers about Dc Machines Aptitude Test
By series parallel method of armature control how many different speeds are possible?
Options
A : 4
B : 8
C : 2
D : Infinite
Which of the following method is used for DC motor with 12+ HP requiring frequent start, stop, speed reversal?
Options
A : Drum type controller is used
B : Three-point starter is used
C : Four-point starter is used
D : Cannot be determined
For constant torque drive which of the following speed control method is preferred?
Options
A : Field control
B : Armature voltage control
C : Shunt armature control
D : Voltage control
The speed of a DC motor can be varied by changing ______________
Options
A : Field current
B : Applied voltage
C : Resistance in series with armature
D : Field current, applied voltage or resistance in series with armature any method will work
Which method is best for series traction motors?
Options
A : Rheostatic armature control
B : Shunted armature control
C : Series parallel control method
D : Any method can be employed
When the armature of a DC motor rotates, emf induced is in machine is called as ___________
Options
A : Self-induced emf
B : Mutually induced emf
C : Back emf
D : Cannot be determined
By series armature resistance method, we can get _________________________
Options
A : Speed above rated speed
B : Speed equal to rated speed
C : Speed below rated speed
D : All speeds are possible
Which of the following is correct statement?
Options
A : Speed regulation of rheostatic armature control method is better than that of shunted armature control
B : Speed regulation of rheostatic armature control method is worse than that of shunted armature control
C : Speed regulation of rheostatic armature control method is almost equal to that of shunted armature control
D : Speed regulation of rheostatic armature control method and of shunted armature control are equally worst.
Consider the armature control method, where 10 ? resistance is connected in series with armature in first case. For second case resistance value is changed 100 ?. Then ____________
Options
A : Speed-torque characteristic of both will start from same point
B : For first case speed-torque characteristic will start below to the case 2
C : For first case speed-torque characteristic will start above to the case 2
D : Can’t say because other parameters are unavailable
Flux density distribution is distorted by armature control method.
Options
A : True
B : False
C :
D :
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