Round sheet metal ductwork should be:
A) Fastened with sheet metal screws and sealed with mastic.
B) Fastened with duct tape and sealed with mastic.
C) Fastened and sealed with mastic.
D) Fastened and sealed with duct tape.
A
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A manual starter is a(n) ____ with motor overload protection.
a. pressure switch b. limit switch c. on-off switch d. float switch
The boiling point of the coolant in the engine may be increased by:
A. Using A 50-50 mixture of antifreeze and coolant B. Increasing the pressure of the coolant C. Circulating the coolant through the radiator D. Both A and B
Why were Egyptian queens more powerful than the royal women of Mesopotamia?
a. They were the embodiment of powerful goddesses. b. They shared in royal and divine blood. c. They were usually literate and could be scribes. d. They, rather than men, controlled the temples.
For maximum efficiency and economy, the refrigeration system in an industrial air dryer is controlled by a flow switch in the air supply line.
Answer the following statement true (T) or false (F)