For a standard off-cycle defrost in a 38° to 40° refrigerator the air-sensing thermostat has a differential of ____.
a. 2° b. 5° c. 10° d. 20°
b. 5°
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The enthalpy of 1.5 kg of nitrogen gas is increased by 28 kJ during a heating process. Initially, the nitrogen temperature is 25°C. Assuming the nitrogen behaves as an ideal gas with constant specific heats, determine the final temperature of the nitrogen.
Given: m = 1.5 kg; ?H = 28 kJ; T1 = 25°C What will be an ideal response?
Compute the measure of ?A rounded to the nearest minute.
Fill in the blank(s) with the appropriate word(s).
Henry Ford's most distinctive contribution to the automobile industry was
A. installment credit buying of cars. B. voluntarily permitting unions to organize in his auto plants and agreeing to negotiate a union contract with the United Auto Workers (UAW) over wages, benefits, and worker safety issues. C. introducing a variety of automobile models with varied colors and styles. D. design changes that improved speed. E. production of a standardized, relatively inexpensive automobile.
Barometric dampers are operated by:
A) A pair of large magnetic solenoids. B) A damper motor, pulley, and belt. C) The air pressure difference across the damper. D) A small gear motor.