The preferred power source for a A-CAC torch is a(n) _____

a. AC constant-voltage machine
b. DC constant-current machine
c. AC or DC constant-voltage machine
d. DC constant-voltage machine


b

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At 2,000 rpm, the maximum allowable exhaust back pressure is approximately:

A. 1.2 psi. B. 2.5 psi. C. 5 psi. D. 7.5 psi.

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Press-in plastic or light metal inserts are used to protect _____ ends from the weather.

a. flanged b. beveled c. male threaded d. socket weld

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Houses used to keep rabbits are referred to as ____________________

Fill in the blank(s) with correct word

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Why should fluorocarbon refrigerant systems NOT be serviced around an open flame?

A) Even small quantities of fluorinated refrigerant are explosive. B) The refrigerant might put out the flame. C) The refrigerant is flammable. D) Poisonous gas can be created.

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