Dc Machines Basic Online Exam Quiz
Dc Machines Basic GK Quiz. Question and Answers related to Dc Machines Basic. MCQ (Multiple Choice Questions with answers about Dc Machines Basic
The speed of a motor falls from 1200 rpm at no-load to 1050 rpm at rated load. The speed regulation of the motor is ____________
Options
A : 12.36%
B : 14.28%
C : 16.77%
D : 18.84%
For large motors what is the ratio of compensating winding is required for increasing the speed of the motor?
Options
A : 2:1
B : 4:1
C : 6:1
D : 8:1
In tapped field control method ____________
Options
A : A variable resistor is connected in parallel
B : A variable resistor is connected in series
C : Field winding is made with more out pins
D : Another field winding is added with the previous one
For higher diverter resistance, speed-torque characteristic will lie ____________
Options
A : Above speed-torque characteristic of lower resistance
B : Below speed-torque characteristic of lower resistance
C : On the speed-torque characteristic of lower resistance
D : Cannot say
Which of the following DC motor has the poorest speed control?
Options
A : Differentially compounded motor
B : Cumulatively compounded motor
C : Shunt motor
D : Series motor
Which of the following method will not give many speed values for a DC series motor?
Options
A : Diverter
B : Series-parallel
C : Field tapped
D : All field control methods will give many speed values
Which of the following is not the method of speed control in DC series motor?
Options
A : Diverter
B : Tapped-field control
C : Variable resistance in series with armature
D : Series- parallel control
In diverter resistor field control method of DC series motor, variable resistor is added ________
Options
A : In parallel with field
B : In series with field
C : In parallel with armature
D : In parallel with load
Where diverters are used?
Options
A : In shunt motors
B : In series motors
C : In both motors
D : All other motors except shunt and series motors
What will happen to the speed of a series motor if the temperature of armature resistance is increased?
Options
A : Not change
B : Decreases
C : Increases
D : Cannot be determined
Dc Machines Applications Dc Machines more Online Exam Quiz
Dc Machines Applications Dc Machines
Dc Machines Armature Reaction 1
Dc Machines Armature Winding Commutator
Dc Machines Braking Dc Motors 1