Dc Machines Multiple Choice Online Exam Quiz
Dc Machines Multiple Choice GK Quiz. Question and Answers related to Dc Machines Multiple Choice. MCQ (Multiple Choice Questions with answers about Dc Machines Multiple Choice
For strong series field, speed-torque characteristic of cumulative compound motor lies __________
Options
A : Above series motor characteristic if current is less than full load current
B : Above shunt motor characteristic if current is less than full load current
C : Below series motor characteristic if current is more than full load current
D : Below series motor characteristic if current is less than full load current
Torque of the cumulative compound DC motor is _____________
Options
A : Addition of Ia and Ia2 term
B : Subtraction of Ia from Ia2 term
C : Subtraction of Ia2 from Ia term
D : Addition of -Ia and -Ia2 term
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?
Options
A : Can be represented by same curve
B : Above
C : Below
D : Cannot be determined
Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current smaller than full load current)?
Options
A : Can be represented by same curve
B : Above
C : Below
D : Cannot be determined
Only motor listed below whose speed increases with increase in armature current is ___________
Options
A : DC series motor
B : DC cumulative compound motor
C : DC shunt motor
D : DC differential compound motor
Speed current characteristic of cumulative DC compound motor at larger values of armature current is similar to that of _____________
Options
A : DC shunt motor
B : Induction motor
C : DC differential compound motor
D : DC series motor
Net field current in a compound motor is given by ______________
Options
A : If (net)= If + (Nse/Nf) Ia
B : If (net)= If – (Nse/Nf) Ia
C : If (net)= If + (Nf/Nse) Ia
D : If (net)= If – (Nf/Nse) Ia
Torque-current characteristic of DC cumulative compound motor _____________
Options
A : Lies above shunt motor characteristic
B : Lies below shunt motor characteristic
C : Lies above of series and shunt motor characteristic both
D : Lies between of series and shunt motor characteristic both
With increase in armature current, speed of the cumulative compound motor _________
Options
A : Reduces slowly compare to shunt motor
B : Reduces sharply compare to shunt motor
C : Remains constant
D : Increases in proportionality with armature current
Which of the following DC motor has negative speed regulation?
Options
A : Shunt motors
B : Series motors
C : Differential compound motors
D : Series and differential compound motors
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