Modern Refrigeration Chapters 44 thru 51

Front

Which of the following is an example of a passive solar energy system? A closed liquid-based system supplemented by a heat pump., A forced-air solar heating system., A greenhouse addition on a home., A pumped water-based solar heating system.

Back

A greenhouse addition on a home.

Front

Which of the following statements regarding solar energy cooling systems is not true? A drawback of solar-powered absorption cooling is that energy output is lowest when cooling demand is the highest., Solar power can be adapted to provide the heat source for an absorption cooling system., Solar power can be used to power a mechanical air-conditioning system., Solar power is typically used for heating rather than for cooling.

Back

A drawback of solar-powered absorption cooling is that energy output is lowest when cooling demand is the highest.

Front

Which of the following would not be used to provide supplementary heat for a liquid-based solar heating system? A gas-fired burner., A heat pump., An in-tank electric resistance heating element., An object with high thermal mass.

Back

An object with high thermal mass.

Front

Which of the following statements regarding solar domestic hot water (DHW) systems is not true? A one-tank solar DHW system replaces a conventional water heater but still uses an auxiliary heating coil., A two-tank solar DHW system preheats water but still relies on a conventional water heater., Solar DHW systems are more widely used and more cost-effective than solar space heating systems., Solar DHW systems pump potable domestic water through solar collectors for direct heating.

Back

Solar DHW systems pump potable domestic water through solar collectors for direct heating.

Front

A(n)__solar heating system may use a thick concrete wall to store thermal energy for heating at a later time.

Back

passive air-based

Front

The tubes in an evacuated tube collector lose almost no heat because heat cannot travel easily through _ _ .

Back

a vacuum

Front

An advantage of building-integrated solar modules is that they _ _ .

Back

can only be used to power various portable devices

Front

Machinery rooms shall not have hot surfaces over _ ºF permanently installed. Options: butane, glycol, R-12, paraffin, 1225

Back

glycol

Front

An example of the thermosiphon effect is

Back

water rising as it heats and falling as it cools in a passive heating system

Front

In a solar cell, the P-type semiconductor has an excess of positive charges, called__.

Back

holes