If the inlet pressure on the backflow preventer drops below the pressure in the hydronic system, springs return both check valves and the movable cartridge to their ____ positions.
a. open
b. closed
c. original
d. preset
c. original
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Which of the following describes the best oral reasons presentation?
a. precise c. emphatic b. sincere d. all answers
Safety precautions when working on a running engine are being discussed. Technician A says to use wheel blocks to block the front and back of one of the wheels. Technician B says never to get under a car when someone else is working on it or when the engine is running
A. A only B. B only C. Both A and B D. Neither A nor B
Hazardous materials include all of the following EXCEPT _________________
A) Engine oil B) Asbestos C) Water D) Brake cleaner
Stick-built forms are typically made from _____.
a. plywood and sheet metal b. lumber and plywood c. stakes and braces d. fiber and rebar