When gas exerts pressure on its container, the pressure is:
A) Higher at corners and converging surfaces.
B) Higher near the middle of the container than toward the outside.
C) Distributed equally on all surfaces of the container.
D) Higher on the larger surfaces.
[Ques. 2] Hacksaws cut:
A) On both forward and back strokes.
B) In helical oscillation created by vibrating the handle.
C) On the back stroke.
D) On the forward stroke.
[Ques. 3] What measurements are needed to determine if refrigerant in a refrigeration system is saturated, superheated, or subcooled?
A) Accurate pressure and temperature readings B) An accurate measurement of heat
C) A manometer and a sling psychrometer D) Enthalpy differential measurements
[Ques. 4] Calculate the amount of heat required to change 5 lb of 32F ice to water.
A) No extra heat is required because the ice is already at the melting temperature.
B) 5 lb 32F 0.5 BTU/lb = 80 BTU
C) The amount of heat required cannot be calculated without knowing the ending temperature of the water.
D) 5 lb 144 BTU/lb = 720 BTU
[Ques. 5] What is the head pressure of a tank 10 ft in height?
A) 43.3 psi B) 433 psi C) 0.433 psi D) 4.33 psi
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