A refrigeration system was checked for leaks. The system temperature and surroundings were 75°F when the system was charged with nitrogen to 100 psig. The temperature then dropped to 50°F. What should the pressure be if no nitrogen has escaped?
A) 9 psig B) 94 psig C) 100 psig D) 90 psig
B
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Answer the following statement(s) true (T) or false (F)
1. All of the energy from wind flowing past a point can be recovered. 2. If wind speed doubles and density and area remain constant, wind power increases by a factor of eight. 3. Physical properties of the land have no effect on the speed and turbulence of the wind. 4. The 1/7 Power Law is used to extrapolate wind speed at a new height from the speed at an old height. 5. Wind turbine designs must consider speed control to prevent mechanical damage and control generator power output when the system is operating above rated speed.
Most pears in this country are grown in ____________________, Oregon, and California
Fill in the blank(s) with correct word
On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed?
A. discharge and suction B. liquid and suction C. discharge and liquid D. No lines need to be installed.
The purpose of the condenser in a refrigeration system is to:
A) Reject heat from the condensing medium. B) Increase the pressure and temperature of the refrigerant. C) Reject heat from the refrigerant. D) Absorb heat into the refrigerant.