What units are used to measure vacuum?
A) In reciprocal psi (1/psi) B) In inches of mercury
C) In negative pascals (-p) D) In negative psi (-psi)
[Ques. 2] Calculate the amount of heat required to change 5 lb of 212F water to steam.
A) 5 lb 970 BTU/lb = 4,850 BTU
B) The amount of heat required cannot be calculated without knowing the starting temperature of the water.
C) 5 lb 212F 1 BTU/lb = 1,060 BTU
D) No extra heat is required because the water is already at the boiling point.
[Ques. 3] Convert a pressure of 10 psi to inches of mercury. How many inches of mercury is the pressure?
A) 100 inches of mercury B) 50 inches of mercury
C) 20 inches of mercury D) 15 inches of mercury
[Ques. 4] Define a vacuum.
A) A vacuum is a negative pressure.
B) Vacuum is the reciprocal of pressure. For every pressure there is a reciprocal vacuum.
C) A vacuum is anti-pressure created by counterclockwise molecular rotation.
D) A vacuum is any pressure less than atmospheric pressure.
[Ques. 5] Two standards for flare fittings are:
A) Imperial standard and metric.
B) The National Pipe and the Society of Automotive Engineers (SAE).
C) Aluminum and magnesium.
D) Imperial metric and standard.
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