What is the distance between shafts of the gear train in question 22?

a. 12 in.
b. 15 in.
c. 24 in.
d. 30 in.


b. 15 in.

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Which of the following characteristics are similar between AC and DC power?

A. Voltage can be stepped up or down by a transformer. B. Polarity is fixed. C. Voltage varies during cycles. D. Heating effect is the same.

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Management salaries are an example of:

A. Semi-variable costs B. Fixed costs C. Multi-variable costs D. Variable costs

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Customers may understand terms like "piston" but not know what one looks like.

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

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Airflow through a typical HVAC system is being discussed. Technician A says that outside air is always used in all heating and cooling positions. Technician B says that the temperature is controlled by blending airflow through the evaporator and heater core. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B

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