How can moisture in the refrigeration system affect the metering device?
A) Water in the system improves operation of the metering device through hydronic cooling.
B) Water will improve the thermal contact of the expansion valve bulb.
C) Water can freeze up at the metering device, causing a restriction.
D) Water will not affect metering device operation.
C
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Answer the following statement(s) true (T) or false (F)
1. Where inch dimensions are less than one, a zero precedes the decimal. 2. Fraction dimensions generally represent a larger tolerance than decimal dimensions. 3. A properly dimensioned print places the smallest dimensions closest to the object and the progressively larger dimensions outward from the object. 4. It is possible in CAD/CAM/CIM to make a print on the computer screen and send the information directly to the computer numerical control machine tool without generating a hard copy or print of the print.
Explain what excessive machining on a head surface causes.
What will be an ideal response?
A water pump can fail to provide the proper amount of coolant flow through the cooling system if what has happened?
A) The impeller blades are worn or slipping on the shaft B) The coolant is leaking from the weep hole C) The bearing is noisy D) A bearing failure has caused the shaft to become loose
Alarm sounding devices, i.e. approved gongs, shall be sufficient in number to be clearly audible to
A. all occupants of a building B. at least 75% of the building occupants C. the majority of building occupants D. all the occupants above the 10th floor