Most portable cranes use what type of pressure for lifting heavy loads?
A) Pneumatic B) Hydraulic C) Both A and B D) Neither A nor B
B
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A heat pump bi-flow filter drier is installed _____.
a. in the vapor line b. in the liquid line c. at the suction service valve d. before the reversing valve
Prevention through design is a new theory of accident causation
Indicate whether the statement is true or false
Phosphoric acid has the form H3PO4. List all the acids that may donate a hydrogen ion and the conjugate bases that may accept the proton for this acid compound.
What will be an ideal response?
When a zone thermostat fan-control switch is moved from Auto to On, what should happen?
a. All system dampers open and the blower starts. b. The zone damper for each zone set to On opens and the blower starts. c. The zone damper for that zone closes, all the others open, and the blower starts. d. The zone damper remains open at all times, regardless of the system operating conditions.