Dc Machines Online Test Online Exam Quiz
Dc Machines Online Test GK Quiz. Question and Answers related to Dc Machines Online Test. MCQ (Multiple Choice Questions with answers about Dc Machines Online Test
Field weakening control method is used for the speed _________
Options
A : Above rated speed
B : Below rated speed
C : Can be used anywhere
D : Can’t tell
Armature resistance control method is used for the speed _____________
Options
A : Above rated speed
B : Below rated speed
C : Can be used anywhere
D : Can’t tell
Which of the following motor is used where high starting torque and wide speed range control is required?
Options
A : All motors
B : Induction motor
C : Synchronous motor
D : DC motor
For very sensitive and wide speed control, which of the following method is preferred?
Options
A : Armature control
B : Ward-Leonard control
C : Multiple voltage control
D : Field control
Why field winding of a DC series motor is provided with thick wire?
Options
A : As it carries large load current
B : To provide large flux
C : In order to reduce eddy current to provide large flux
D : To reduce the of insulting materials
The armature voltage control of DC motor will provide ___________
Options
A : Constant power drive
B : Constant voltage drive
C : Constant current drive
D : Constant torque drive
Which function is performed by counter emf of a DC motor?
Options
A : Exceeds supply voltage
B : Aids applied voltage
C : Helps in energy conversion
D : Regulates its armature voltage
The output power of any electrical (AC or DC) motor is taken from the ______________
Options
A : Field
B : Coupling mounted on the shaft
C : Armature
D : Motor frame
At the instant of starting, when a DC motor is put on supply, it will behave like ______________
Options
A : Highly resistive circuit
B : Low resistance circuit
C : Capacitive circuit
D : Inductive circuit
All others are advantages of DC motor over AC motor except _______________
Options
A : Low cost
B : Wide speed range
C : Stability
D : High starting torque
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