The boom angle of a crane is measured from the _____.
a. end of the boom to the ground
b. center of the load to the center of the boom
c. top of the cab to the center of the boom base
d. the horizontal plane to the center line of the boom base
d. the horizontal plane to the center line of the boom base
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What two pressures control the operation of an automatic expansion valve?
What will be an ideal response?
Calculate the amount of heat required to change 5 pounds of 212° water to steam
A) 5lbs × 212°F × 1 BTU/lb = 1060 BTUs B) 5 lbs × 970 BTUs/lb = 4850 BTUs C) No extra heat is required because the water is already at the boiling point. D) The amount of heat required cannot be calculated without knowing the starting temperature of the water.
In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross sectional area of the wire:
A) increases. B) halves. C) doubles. D) decreases.
Match the following wire colors with the proper function.
A. cooling circuit B. indoor fan circuit C. Hot (power coming from the transformer) D. heating circuit E. hot (power feeding the cooling circuit) F. hot (power feeding the heating circuit)