A trap should provide a liquid seal of _____ inch(es)
A) 1/2 to 1
B) 1 to 2
C) 2 to 4
D) 4 to 6
Answer: C
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A 5.0L engine operating at 5000 RPM draws air at a rate of 354.0 CFM. Calculate the volumetric efficiency to the nearest percent
What will be an ideal response?
A reset controller in a hydronic heating system is used to _____
a. reset the burner after shutdown b. control multiple zone valves c. modulate pump water flow d. monitor outdoor temperature
In a parallel circuit, the current flow through the inductor will be _____.
A. in phase B. 180° out of phase C. 90° out of phase with the voltage D. less than 90° out of phase with the resistor current lagging
Scale results in a low head pressure in the cooling mode and high suction pressure in the heating mode.
Answer the following statement true (T) or false (F)