A solar water heater system heated 67.4325 gallons of wat?er during 9.25 hours one day.  What is the rate of water heating by this system in gallons per hour?

Fill in the blank(s) with the appropriate word(s).


7.29 gallons per hour

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Answer the following statement(s) true (T) or false (F)

1. Mechanical type brakes cannot hold a suspended load.
2. In the accompanying figure, the brake is applied automatically when the motor is not operating.

3. Dynamic braking for a DC motor is very effective, but the braking effect becomes weaker as the armature slows down.
4. Plugging is used with direct current motors more than with three phase squirrel cage motors.
5. One method of providing plugging control is with the use of an automatic timed circuit.

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The most important tools that the technician has for troubleshooting are electric meters.

Answer the following statement true (T) or false (F)

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When lifting a rabbit you should grasp it by:

a. its ears c. the scruff of its neck b. its front or rear legs d. any of these

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How do jogging circuits work?

What will be an ideal response?

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