Match the symptom with all possible causes. Note: The choices can be used more than once.
A. refrigerant overcharge
B. non-condensable gas in system
C. defective condenser fan motor
D. dirty condenser coil
E. refrigerant undercharge
F. blocked/dirty filter
G. defective evaporator fan motor
H.
I. improper system balancing
J.
K.
A. high operating pressures
B. high operating pressures
C. high operating pressures
D. high operating pressures
E. low operating pressures
F. low operating pressures
G. low operating pressures
H. frozen evaporator coil
I. uneven cooling
J. low superheat
K. high superheat
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To find effective high-level commanders, the Union
A. took only top graduates of West Point. B. drew on its reserve officer training program. C. relied on the advice of foreign experts. D. did not let politics enter the decision-making process. E. used trial and error.
A potentially fatal disease caused by breathing in cement dust is _____.
a. cement dermatitis b. emphysema c. asbestosis d. silicosis
________: is the point at which the marginal physical product curve for a particular input is rising but still lies above the average physical product curve.
Fill in the blank(s) with the appropriate word(s).
For a fuel cell to convert energy to electricity it should be provided with:
A. Hydrogen only B. Oxygen only C. Hydrogen and oxygen D. Water