Series Wound DC Motor Quiz

DC series motor is extensively used in the applications where medium speed and high _____ is required.

• A. Torque

• B. Efficiency

• C. Power

• D. Voltage

What type of speed control is commonly used for a series wound DC motor?

• A. Pole changing

• B. Resistance

• C. Induction

• D. Gear

The starting torque of a series motor?

• A. Increases with load

• B. Increases with speed

• C. Decreases with load

• D. Remains constant

The speed of a series motor is inversely proportional to the ________.

• A. Armature current

• B. Field current

• C. Resistance

• D. Voltage

The speed regulation of a DC series motor is?

• A. High

• B. Low

• C. Medium

• D. Variable

The efficiency of a series wound DC motor is typically lower than that of a _____ motor.

• A. Shunt

• B. Compound

• C. Permanent magnet

• D. Synchronous

What is the power factor of a series wound DC motor when it is fully loaded?

• A. 0.5

• B. 1

• C. 0

• D. -1

The speed of a series wound DC motor can be controlled by varying the _____.

• A. Line current

• B. Armature current

• C. Field current

• D. Voltage

The series motor has maximum torque at ______ speed.

• A. Standstill

• B. Full load

• C. Rated

• D. Half load

Which of the following is NOT a disadvantage of a series wound DC motor?

• A. Poor efficiency

• B. High starting torque

• C. Poor speed regulation

• D. Low maintenance