Industrial drivers Practice Questions & Answers

________ need frequent starting and stopping of electric motors,

________ need frequent starting and stopping of electric motors,

A).  Paper mills

B).  Grinding mills

C).  Air-conditioners

D).  Lifts and hoists

For blowers which of the following motor is preferred?

For blowers which of the following motor is preferred?

A).  D.C. series motor

B).  D.C. shunt motor

C).  Squirrel cage induction motor

D).  Wound rotor induction motor

Which of the following motors is preferred when quick speed reversal is the main consideration?

Which of the following motors is preferred when quick speed reversal is the main consideration?

A).  Squirrel cage induction motor

B).  Wound rotor induction motor

C).  Synchronous motor

D).  D.C. motor

While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance?

While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance?

A).  Running characteristics

B).  Starting characteristics

C).  Efficiency

D).  Braking

Which feature, while selecting a motor for centrifugal pump, will be of least significance?

Which feature, while selecting a motor for centrifugal pump, will be of least significance?

A).  Starting characteristics

B).  Operating speed

C).  Horse power

D).  Speed control

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