Electrical Engineering Mcqs

___________________is preferred for synthetic fibre mills?

• (A)  Synchronous motor
• (B)  Reluctance motor
• (C)  Series motor
• (D)  Shunt motor

Answer

Submitted By :Ali Uppal

Which of the following motors is used for elevators ?

• (A)  Induction motor
• (B)  Synchronous motor
• (C)  Capacitor start single phase motor
• (D)  Any of the above

Answer

Submitted By :Ali Uppal

________________ motor is a constant speed motor?

• (A)  Synchronous motor
• (B)  Schrage motor
• (C)  Induction motor
• (D)  Universal motor

Answer

Submitted By :Ali Uppal

The starting torque of a D.C. motor is independent of which of the following?

• (A)  Flux
• (B)  Armature current
• (C)  Flux and armature current
• (D)  Speed

Answer

Submitted By :Ali Uppal

need frequent starting and stopping of electric motors ?

• (A)  Paper mills
• (B)  Grinding mills
• (C)  Air-conditioners
• (D)  Lifts and hoists

Answer

Submitted By :Ali Uppal

For which of the following applications D.C. motors are still preferred ?

• (A)  High efficiency operation
• (B)  Reversibility
• (C)  Variable speed drive
• (D)  High starting torque

Answer

Submitted By :Ali Uppal

___________________is not a part of ball bearing ?

• (A)  Inner race
• (B)  Outer race
• (C)  Cage
• (D)  Bush

Answer

Submitted By :Ali Uppal

Heat control switches are used in__________________?

• (A)  transformers
• (B)  cooling ranges
• (C)  three phase induction motors
• (D)  single phase

Answer

Submitted By :Ali Uppal

In jaw crushers a motor has to often start against ____________________ load?

• (A)  heavy
• (B)  medium
• (C)  normal
• (D)  low

Answer

Submitted By :Ali Uppal

Rotor of a motor is usually supported on ___________________ bearings?

• (A)  ball or roller
• (B)  needle
• (C)  bush
• (D)  thrust

Answer

Submitted By :Ali Uppal