Chapter 4 ETE Test

Motor control involves….

• Starting the motor.

• Stopping the motor.

• Direction and speed controls of the motor.

• All of the above.

Identify the component of the motor-starter.

• Fuse.

• Circuit breaker.

• Over-load relay.

• Main Switch.

Identify the component/s of the motor-supply circuit.

• Circuit-breaker.

• Fuse.

• Power Contacts.

• All of the above.

Fuse is used in the circuit to…

• Protect the circuit components from short circuit faults

• Limit the starting current.

• Disconnect the circuit from supply mains in the event of any fault

• All of the above

Contactor is ….

• Manually operated switch

• Protection device

• Electromagnetic coil

• Electromagnetically operated circuit breaker

Overload relay protects the motor from…

• Over-voltage condition

• Over-current condition

• Excessive speeding

• Undesirable oscillations

Fuse protects the motor from…

• Under-voltage condition

• Excessive speeding.

• Short-circuit condition.

• Undesirable oscillations.

NO contact means…

• Number One contact

• Neutral On contact

• Normally On contact

• Normally Open contact

NC contact means…

• Neutral Cut contact

• Normally Cut contact

• Normally Closed contact

• No Closed contact

Red push-button is generally used to…

• Start the motor

• Accelerate the motor

• Decelerate the motor

• Stop the motor