HVAC FC 03

Compressors of oil control systems must be kept lubricated, but the oil must be prevented from moving through the system. What is not an oil control device?

• regulator device
• sight glass
• separator
• reservoir

The approximate heat content of natural gas is

• 950 to 1,150 Btu/ft3.
• 1,225 to 1.650 Btu/ft3.
• 2,500 to 3,200 Btu/ft3.
• 3,500 to 3,800 Btu/ft3.

For downflow units, condensate disposal water level monitoring devices MUST be installed inside the

• primary drain pan
• auxillary drain pan
• primary drain line
• auxillary drain line

During installation or service of electrical controls, a digital multimeter set to voltage must be connected in what manner?

• in series
• in parallel
• in line with the source
• between the source and the load

What will be the ton rating of a refrigerating mechanism capable of absorbing 1,440.000 Btus in 24 hours?

• 4 tons
• 5 tons
• 6 tons
• 8 tons

Which of the following refrigerants will have the MOST static loss of pressure across a liquid line with a 30-foot vertical line?

• R-22
• R-134a
• R-404A
• R-507

The absorption systems is different from the compression system in that uses

• heat energy
• mechanical energy
• high pressure vapor
• vapor compression

From the list of personal protective equipment, which one is NOT included in such category?

• a hard hat
• a tool belt
• goggles
• steel toe boots

Which component compresses refrigerant vapor?

• expansion valve
• evaporator
• compressor
• condenser

A running capacitor in a system is being replaced. By how much greater can the capacitance be increased?

• 5 percent
• 10 percent
• 15 percent
• 20 percent