The fact that the system can be treated against corrosion is an advantage for which system?

The fact that the system can be treated against corrosion is an advantage for which system?

a) A run around system
b) A heat pipe
c) A heat pump
d) A thermal wheel
e) A heat valve






Answer: B

The system which runs as a refrigeration system used for air conditioning purposes in the summer and can be modified to run in reverse in cooler weather is called a

The system which runs as a refrigeration system used for air conditioning purposes in the summer and can be modified to run in reverse in cooler weather is called a

a) runaround system
b) heat valve
c) heat pump
d) heat pipe
e) thermal wheel







Answer: D

The run around coil heat recovery system uses a _____ coil in the inlet air duct and a _____ coil in the exhaust air duct.

The run around coil heat recovery system uses a _____ coil in the inlet air duct and a _____ coil in the exhaust air duct.

a. Preconditioning, recovery
b. Heating, cooling
c. Cooling, heating
d. Recovery, conditioning
e. Heating, recovery







Answer: A

The heat recovery system that employs a single exchange unit consisting of a casing split into two sections and a segmented rotating wheel 300 mm thick and 1 to 3.7 m in diameter is called a:

The heat recovery system that employs a single exchange unit consisting of a casing split into two sections and a segmented rotating wheel 300 mm thick and 1 to 3.7 m in diameter is called a:

a. Run around system
b. Thermal wheel
c. Heat pipe
d. Heat valve
e. Heat pump

Answer: B

Cross contamination is a disadvantage for which of the following heat recovery systems?

Cross contamination is a disadvantage for which of the following heat recovery systems?

a. A run around system
b. A heat pipe
c. A heat tube
d. A thermal wheel
e. A heat valve





Answer: D

The heat recovery system which makes use of an underground heat exchange coil is called a:

The heat recovery system which makes use of an underground heat exchange coil is called a:

a. Run around system
b. Thermal wheel
c. Heat tube
d. Heat pump
e. Heat pipe

Answer: D

When is the capacity of a heat pipe at a maximum?

When is the capacity of a heat pipe at a maximum?

a. When the evaporator is lowered below the horizontal
b. When the evaporator is raised above the horizontal
c. When the system is placed vertically with the evaporator on top
d. When the system is placed vertically with the condenser on top
e. When the system is level






Answer: A

A refrigeration system used in HVAC service, that can provide both heating and cooling, is a

A refrigeration system used in HVAC service, that can provide both heating and cooling, is a

a. Run around system
b. Heat valve
c. Heat pump
d. Regenerative system
e. Thermal wheel






Answer: C

Which of the following statements about run around heat recovery systems is false?

Which of the following statements about run around heat recovery systems is false?

a. Installation costs are comparatively low
b. The system is readily adaptable to retrofit applications
c. Piping is not required in the system
d. The exhaust and ventilation streams can be remote
e. Maintenance is relatively simple






Answer: C

The performance of a heat pump system (or C.O.P.) is the ratio of:

The performance of a heat pump system (or C.O.P.) is the ratio of:

a. Heat output divided by heat input
b. Heat input divided by energy output
c. Energy input divided by energy output
d. Energy input divided by heat output
e. Heat output divided by energy input






Answer: E

The heat recovery system which has a capillary wick structure consisting of fine circumferential striations machined on its internal surface is called a:

The heat recovery system which has a capillary wick structure consisting of fine circumferential striations machined on its internal surface is called a:

a. Heat valve
b. Run around system
c. Heat pump
d. Thermal wheel
e. Heat pipe






Answer: E

Which of the following is NOT an advantage of a run-around heat recovery system?

Which of the following is NOT an advantage of a run-around heat recovery system?

a. The system can be retrofitted to existing HVAC systems with relative ease
b. Maintenance is relatively simple
c. 100% heat recovery is possible during the coldest times of the year
d. No cross-contamination of airflows occurs
e. The exhaust and ventilation ductwork can be located at a distance from one another






Answer: C

What is the name of the heat recovery system that consists of two finned tube heat exchangers?

What is the name of the heat recovery system that consists of two finned tube heat exchangers?

a. A run around system
b. A heat valve
c. A heat pump
d. A heat tube
e. A thermal wheel



Answer: A

A system consists of two finned tube heat exchangers. Where is the preconditioning coil of this system located?

A system consists of two finned tube heat exchangers. Where is the preconditioning coil of this system located?

a. On the suction side of the pump
b. On the discharge side of the 3-way mixing valve
c. In the duct work handling outside air
d. At the end of the charging unit
e. In the ductwork handling exhaust air





Answer: C

Which of the following is a disadvantage of heat pipe heat recovery systems?

Which of the following is a disadvantage of heat pipe heat recovery systems?

a. Heat pipes have high maintenance requirements
b. Heat pipes suffer from cross-contamination of the air streams
c. Heat pipes have high power consumption
d. A side-by-side duct arrangement is needed
e. The necessary pumps and piping are complicated and expensive to install




Answer: D