An R-22 system has a 6 psi pressure drop in the liquid line and leaves the condenser at 218 psi. If the pressure at the top of the vertical lift is 199 psi, what is the height of the vertical lift?
A) 19 ft B) 26 ft C) 21 ft D) 29 ft
[Ques. 2] An R-22 system has a 28-ft lift and a 7 psi pressure drop in the liquid line due to vertical lift. If the liquid leaves the condenser at 244 psi, what is the pressure at the top of the vertical lift?
A) 223 psi B) 230 psi C) 214 psi D) 237 psi
[Ques. 3] How can moisture in the refrigeration system affect the metering device?
A) Water will improve the thermal contact of the expansion valve bulb.
B) Water in the system improves operation of the metering device through hydronic cooling.
C) Water can freeze up at the metering device, causing a restriction.
D) Water will not affect metering device operation.
[Ques. 4] Vertical lines going from top to bottom are referred to as which of the following?
A) Constant quality B) Pressure line C) Enthalpy D) Saturation curve
[Ques. 5] For most systems, the minimum velocity in a vertical suction line is:
A) 3,0003,500 ft per minute. B) 1,0001,500 ft per minute.
C) 500750 ft per minute. D) 7501,000 ft per minute.
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