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Course 59983

Course 59983

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Concerning dashpot-type overload relay, what is the function of the dashpot?

It is used to sense the motor current.

❌

It provides a time delay for the overload relay.

✅

The oil in the dashpot provides lubrication for the relay.

❌

The oil in the dashpot is used to cool the heater connected in series with the motor.

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Assume that a manual starter provides overload protection, but does not provide low voltage release. If the power should fail, ____.

the motor will restart automatically when the power is restored

the motor will not automatically restart when power is restored

an operator must restart the motor by pressing the start button

the motor cannot be restarted until the stop button is pressed to reset the overload release mechanism

❌

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Assume that a solder melting type of overload relay has tripped on overload. Why is it necessary to wait for a few minutes before trying to reset the overload?

The spring that controls the overload contacts must cool before the contacts can be reclosed.

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The solder must cool and become hard again before the relay can be reset.

✅

The motor windings should be permitted to cool before power is reapplied to the motor.

❌

It permits the bimetal strip to cool and reset the contacts.

❌

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In the schematic shown below, assume that the switch is in the auto position. What must happen to make the pump motor start?

The manual starter contacts must be open and the water level must drop.

The manual starter contacts must be closed and the water level must rise.

The manual starter contacts must be open and the water level must rise.

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The manual starter contacts must be closed and the water level must drop.

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In the circuit shown below, if the pilot light is on, it is an indication that the ____.

pump motor is running

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load contacts of the manual starter are closed and power is supplied to the auto/man switch and float switch

water level has dropped and the float switch contacts have closed

pump motor is not running

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In the circuit shown above, what does the red pilot light indicate?

The red pilot light turns on when the thermostat contact closes.

Power is applied to the control circuit and the heaters are not connected to power.

The red pilot light indicates that the heating resistors are operating and producing heat.

Power is applied to the control circuit and the heaters are connected to power.

❌

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In the circuit shown above, the thermostat is shown as a ____.

normally closed temperature switch

normally open temperature switch

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normally open held closed temperature switch

normally closed held open temperature switch

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If you are connecting the control circuit shown below, would you connect the float switch as normally open or normally closed?

The symbol shown below is ____.

a normally open switch

✅

a normally closed switch

❌

a normally open held closed switch

❌

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The symbol shown below is ____.

normally closed switch

✅

normally open switch

❌

normally open held closed switch

❌

normally closed held open switch

❌

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