Deck 26: Primary Resistor-Type Starters

Question 1

A primary resistance-type starter has a low initial cost.

Answer 1

True

Question 2

Primary resistor starters provide closed transition starting.

Answer 2

True

Question 3

Some starters have compression disk resistors and are used for starting polyphase squirrel cage motors.

A)graphite
B)steel
C)platinum
D)stainless steel

Answer 3

A

Question 4

AC primary resistor starters are available only with multi-points of acceleration.

Question 5

With primary resistor starters, the motor starts at a power factor than with other starting methods.

A)much lower
B)slightly lower
C)slightly higher
D)much higher

Question 6

Primary resistor starters are used to start squirrel cage motors in situations where limited torque is required .

A)to save in operation costs
B)for a fast response
C)for short periods of operation
D)to prevent damage to driven machinery

Question 7

Primary resistor starters are used with limited current inrush .

A)to save in operation costs
B)for a fast response
C)to prevent excessive power line disturbances
D)for short periods of operation

Question 8

With primary resistor-type starters, a resistor is connected in parallel in the lines to the motor.

Question 9

When full-voltage starting may cause serious line disturbances, reduced voltage starters may be recommended for motors with ratings as small as horsepower.

A)5
B)8
C)10
D)12

Question 10

A primary resistance-type starter has a high power factor.