Question 1

A(n) ______________indicates when power is supplied to the control circuit.

Accepted Answer

A) green pilot lamp 
B) audible alarm 
C) flashing LED 
D) red warning lamp A

Question 2

The normally closed set of the overload relay is connected in parallel with float switch EFS and will active the red warning lamp and alarm in the event of________________ .

Accepted Answer

A) a short 
B) falling water levels 
C) rising water levels 
D) a motor overload D

Question 3

The overload relay for a wound rotor motor contains two sets of contacts, both normally closed.

Accepted Answer

A) True 
 B)False  False

Question 4

If the motor is operating at a low speed and a higher speed is selected, the motor immediately increases to the next higher speed if it has been operating in its present speed for more than____________ .

Accepted Answer

A) 3 seconds 
B) 30 seconds 
C) 1 minute 
D) 3 minutes

Question 5

Four separate levers permit selection of the motor's operating speed.

Accepted Answer

A) True 
 B)False

Question 6

Current transformers sense motor current and supply current to the____________ .

Accepted Answer

A) float switches 
B) overload heaters 
C) speed control circuit 
D) contactors

Question 7

If the motor is operating and a lower speed is selected, it immediately decreases to the lower speed without time
delay.

Accepted Answer

A) True 
 B)False

Question 8

Pilot control devices are often employed to control the operation of a wound rotor induction motor.

Accepted Answer

A) True 
 B)False

Exam 37: Automatic Speed Control for Wound Rotor Motors

A(n) ______________indicates when power is supplied to the control circuit.

The normally closed set of the overload relay is connected in parallel with float switch EFS and will active the red warning lamp and alarm in the event of________________ .

The overload relay for a wound rotor motor contains two sets of contacts, both normally closed.

If the motor is operating at a low speed and a higher speed is selected, the motor immediately increases to the next higher speed if it has been operating in its present speed for more than____________ .

Four separate levers permit selection of the motor's operating speed.

Current transformers sense motor current and supply current to the____________ .

If the motor is operating and a lower speed is selected, it immediately decreases to the lower speed without time delay.

Pilot control devices are often employed to control the operation of a wound rotor induction motor.