MR Random 1

__ refrigerant is like a soaking wet sponge that cannot absorb more water.

• Low-pressure liquid
• Low-pressure vapor
• High-pressure liquid
• High-pressure vapor
• 67

When liquid charging a zeotrope into the low side, which device is installed to prevent liquid refrigerant from entering the compressor from the low side?

• piercing valve
• Schrader valve
• metering device
• vacuum gauge
• 219

Advanced refrigerators can use which of the following to adjust conditions inside a refrigerator storage drawer?

• Dampers that adjusts airflow through the drawer.
• Low-wattage heaters.
• Circulation fans.
• All of the above.
• 478

A cooling effect can be generated through

• air exchange
• pressure change
• State change
• All of the above.
• 65

Which type of epoxy resin must be heated in order to harden?

• One-part
• Two-part
• Three-part
• Four-part
• 211

What type of solvent cement can be used with Schedule 40 PVC pipe and fittings under 6"?

• ABS cement
• Light-duty CPVC cement
• Light-duty PVC cement
• All of the above.
• 135

A gas furnace with a multistage thermostat uses__ to control its heat capacity.

• a cooling anticipator
• multiple sets of electric resistance heating coils
• a reed switch
• a two-stage or modulating gas valve
• 665

Name the rotating part of a de generator that is connected to the wire loop.

• Brush
• Slip ring
• Commutator
• Primary coil
• 241

If a refrigeration system has a capillary tube metering device, then the__method should be used to check the charge in the system.

• active recovery
• passive recovery
• subcooling
• superheat
• 191

Which of the following measurements accounts for the boundary air films inside and outside of a cabinet?

• C-value.
• K-value.
• R-value.
• U-value.
• 932