Question 1

A decelerating relay is similar in action to a(n) relay.&#10;A)compelling&#10;B)reversal&#10;C)time&#10;D)accelerating

Accepted Answer

A decelerating relay is the opposite of an accelerating relay, which means it slows down the process instead of speeding it up. Therefore, the answer is D) accelerating relay. A decelerating relay is the opposite of an accelerating relay, as it slows down or decelerates a process rather than speeding it up. Therefore, the correct choice is D - accelerating relay, as the opposite action is taken by a decelerating relay.

Question 2

Compelling relays ensure that the motor starts at the lowest speed.

Accepted Answer

Compelling relays are used to ensure that the motor starts at the highest speed, not the lowest speed.

Question 3

In a standard starter, before change is made from a higher to a lower speed, .&#10;A)the overload relay must be reset&#10;B)the contacts must be reclosed&#10;C)the stop button must be pressed&#10;D)the motor must be reversed

Accepted Answer

Pressing the stop button is necessary to safely transition from a higher to a lower speed in a standard starter, ensuring the motor is not running during the change to prevent damage or unsafe conditions.

Question 4

With a compelling relay, the motor is started at low speed and is then accelerated automatically through successive speed steps until the selected speed is reached.

Accepted Answer

A compelling relay does not control motor speed or acceleration. It is typically used for monitoring and protection purposes in electrical circuits, not for speed control of motors. Speed control and acceleration of motors are usually achieved through devices like variable frequency drives (VFDs) or motor starters with speed control capabilities.

Question 5

With an accelerating relay, the motor can be started only by pressing the low-speed push button.

Accepted Answer

With an accelerating relay, the motor can be started by pressing either the low-speed or high-speed push button. With an accelerating relay, the motor can be started by pressing either the low-speed push button or the high-speed push button. The relay will slowly increase the voltage to the motor until it reaches the desired speed.

Question 6

Multispeed starters are provided with mechanical and electrical interlocking.

Accepted Answer

Multispeed starters are provided with both mechanical and electrical interlocking to ensure safe and reliable operation. The mechanical interlock prevents the selection of more than one speed at a time, while the electrical interlock ensures that the contactor for the higher speed is not energized until the contactor for the lower speed is de-energized. Multispeed starters are provided with both mechanical and electrical interlocking to ensure safe and efficient operation. The mechanical interlock ensures that only one contactor can be closed at a time, while the electrical interlock ensures that there is no overlap in the energization of the contactors. This helps prevent damage to the system and ensures that the motor runs smoothly across all speeds.

Question 7

When the starter is equipped with an accelerating relay, .&#10;A)the motor can be started only by pressing the low-speed push button&#10;B)the motor must be started at low speed before a higher speed can be selected&#10;C)the motor is started at low speed and is then accelerated manually&#10;D)the final speed is determined by the button pressed

Accepted Answer

The answer of When the starter is equipped with an...

Question 8

Mechanical and electrical interlocking avoid the possibility of .&#10;A)connecting more than one speed winding at the same time&#10;B)overusing the line&#10;C)connecting more than two speed windings at the same time&#10;D)disconnecting the line

Accepted Answer

Mechanical and electrical interlocking ensure that only one speed winding can be connected at a time, preventing the possibility of connecting more than one speed winding simultaneously. It does not relate to overusing or disconnecting the line, nor does it address the issue of connecting more than two speed windings. Mechanical and electrical interlocking systems are designed to prevent more than one speed winding from being connected at the same time. This helps to ensure the safety and proper functioning of the motor or other equipment being used.

Question 9

When a compelling relay is used, .&#10;A)the final speed is determined by the button pressed&#10;B)the motor must be started at low speed before a higher speed can be selected&#10;C)the motor is started at low speed and is then accelerated automatically&#10;D)definite time intervals must elapse between each speed change

Accepted Answer

The answer of When a compelling relay is used, .&#10;A)the...

Question 10

Four-speed, consequent pole, squirrel cage motors have two reconnectable windings and two speeds for each winding.

Accepted Answer

This statement is true. Four-speed, consequent pole, squirrel cage motors do have two reconnectable windings and two speeds for each winding. Four-speed, consequent pole, squirrel cage motors do have two reconnectable windings and two speeds for each winding.

Deck 33: Four-Speed Two-Winding 28consequent Pole29 Motor Controller