MCQ TEST

1.Which of the following is not a type of electrical machine?

• Dc motor

• Ac generator

• Transformer

• Battery

What is the basic principle of operation of Dc motor?

• Faradays laws of electromagnetic induction

• Lenzs law

• Flemings left hand rule

• Flemings right hand rule

Which of the following motors is commonly used for traction purposes?

• • A) Synchronous motor

• • B) Series DC motor

• • C) Shunt DC motor

• • D) Capacitor-start motor

In a DC machine, the function of a commutator is to

• • A) Convert AC to DC

• • B) Convert DC to AC

• • C) Convert AC into pulsating DC

• • D) Reverse the direction of current in the armature winding

In a transformer, which losses are minimized by using laminated cores?

• • A) Hysteresis losses

• • B) Copper losses

• • C) Eddy current losses

• • D) Stray losses

The purpose of using a starter in a DC motor is to:

• • A) Increase speed

• • B) Limit the starting current

• • C) Increase torque

• • D) Reduce armature voltage

Which part of the induction motor produces the rotating magnetic field?

• • A) Rotor

• • B) Commutator

• • C) Brushes

• • D) Stator

In a DC motor, which part generates the back EMF?

• • A) Stator winding

• • B) Commutator

• • C) Armature winding

• • D) Brushes

What is the primary function of a DC motor's field winding?

• • A) To supply the load current

• • B) To create a magnetic field

• • C) To supply back EMF

• • D) To reduce losses in the motor

Which type of DC motor is most suitable for applications where speed control is critical?

• • A) Series DC Motor

• • B) Shunt DC Motor

• • C) Compound DC Motor

• • D) Permanent Magnet DC Motor