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

1. It is true that time elapses during nearly every action taking place on a machine. This fact means that a timer is always the best means of control.
2. Time-delay relays have a normally open and a normally closed timing contact.
3. The manual-set timer requires manual operation of the timer to start and stop operation.
4. The main difference among temperature switches is the means by which the temperature information is transferred from the sensing element to the switching element.
5. The actual temperature in an on/off system will always fluctuate about some value.


1. False
2. True
3. False
4. True
5. True

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When comparing mutually exclusive alternatives that have different lives by the present worth method, it is necessary to:

(a) Always compare them over a period equal to the life of the longer-lived alternative (b) Always compare them over a time period of equal service (c) Always compare them over a period equal to the life of the shorter-lived alternative (d) Find the present worth over one life cycle of each alternative

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A common source of vacuum for boosters used on diesel engines is ________

A) Exhaust manifold B) Auxiliary vacuum pump C) Carburetor D) Intake manifold

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A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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What will be an ideal response?

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