A refrigeration system requiring a "fast pull down" would most likely use a thermostatic expansion valve with a liquid - thermal bulb.
Answer the following statement true (T) or false (F)
True
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When a diesel engine is operating at its best efficiency, how much of the potential heat energy of the fuel is converted into usable energy at the flywheel?
A. 30 % B. 40 % C. 70 % D. 80 %
What is the difference between electrochromic mirrors and automatic tilt rear view mirrors?
What will be an ideal response?
In the American Engineers Handbook, the standard temperature of material resistance is _____.
A. 20°C B. 30°C C. 40°C D. 50°C
Beside maintaining pressure on the contacts for current carrying capacity, the pressure springs have a second important function. This is to ____.
A. keep the contacts in line B. help obtain equal contacts against the stationary contacts C. slow down the pull of the armature into place to reduce the noise D. increase the power required to close the contacts