Q.1
##### Net field current in a compound motor is given by ______________
• 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
Q.2
##### With increase in armature current, speed of the cumulative compound motor _________
• a) Reduces slowly compare to shunt motor
• b) Reduces sharply compare to shunt motor
• c) Remains constant
• d) Increases in proportionality with armature current
Q.3
##### Speed current characteristic of cumulative DC compound motor at larger values of armature current is similar to that of _____________
• a) DC shunt motor
• b) Induction motor
• c) DC differential compound motor
• d) DC series motor
Q.4
• a) True
• b) False
Q.5
##### Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?
• a) Can be represented by same curve
• b) Above
• c) Below
• d) Cannot be determined
Q.6
##### Where speed-current characteristic of DC shunt motor lies with respect to DC cumulative compound motor (assume current smaller than full load current)?
• a) Can be represented by same curve
• b) Above
• c) Below
• d) Cannot be determined
Q.7
##### Only motor listed below whose speed increases with increase in armature current is ___________
• a) DC series motor
• b) DC cumulative compound motor
• c) DC shunt motor
• d) DC differential compound motor
Q.8
##### Torque of the cumulative compound DC motor is _____________
• 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
Q.9
##### Torque-current characteristic of DC cumulative compound motor _____________
• 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
Q.10
##### For strong series field, speed-torque characteristic of cumulative compound motor lies __________
• 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
Q.11
##### Which of the following DC motor has negative speed regulation?
• a) Shunt motors
• b) Series motors
• c) Differential compound motors
• d) Series and differential compound motors