Question 1

By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

Accepted Answer

A) Frame 
B) Shaft 
C) Commutator 
D) Stator 
A) Frame 
B) Shaft 
C) Commutator 
D) Stator

Question 2

If a D.C. motor is connected across the A.C. supply it will

Accepted Answer

A) run at normal speed 
B) not run 
C) run at lower speed 
D) burn due to heat produced in the field winding by .eddy currents 
A) run at normal speed 
B) not run 
C) run at lower speed 
D) burn due to heat produced in the field winding by .eddy currents

Question 3

In D.C. shunt motors as load is reduced

Accepted Answer

A) the speed will increase abruptly 
B) the speed will increase in proportion to reduction in load 
C) the speed will remain almost/constant 
D) the speed will reduce 
A) the speed will increase abruptly 
B) the speed will increase in proportion to reduction in load 
C) the speed will remain almost/constant 
D) the speed will reduce

Question 4

A direct on line starter is used: for starting motors

Accepted Answer

A) iip to 5 H.P. 
B) up to 10 H.P. 
C) up to 15 H.P. 
D) up to 20 H.P. 
A) iip to 5 H.P. 
B) up to 10 H.P. 
C) up to 15 H.P. 
D) up to 20 H.P.

Question 5

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be

Accepted Answer

A) almost negligible 
B) rated full-load current 
C) less than full-load current 
D) more than full-load current 
A) almost negligible 
B) rated full-load current 
C) less than full-load current 
D) more than full-load current

By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

If a D.C. motor is connected across the A.C. supply it will

In D.C. shunt motors as load is reduced

A direct on line starter is used: for starting motors

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be

D.C. Motors

D.C. Motors and Speed Control

D.C. Motors and Generators

D.C. Generator and Motor Efficiency, Testing and Braking Techniques

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Exam 1: D.C. Motors and Their Applications

By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?

If a D.C. motor is connected across the A.C. supply it will

In D.C. shunt motors as load is reduced

A direct on line starter is used: for starting motors

In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be

D.C. Motors

D.C. Motors and Speed Control

D.C. Motors and Generators

D.C. Generator and Motor Efficiency, Testing and Braking Techniques

Filters