Neil Revollo
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Unit 36 - Refrigeration Applied to Air-Conditioning

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Neil Revollo
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Unit 36 Quiz

Unit 36 Quiz

Question 1 of 20

1

The total heat content of infiltrated air of the same dry-bulb temperature may vary from one part of the country to another because of the difference in __________.

Select one of the following:

  • Solar load

  • Sensible heat

  • Humidity

  • Convection currents

Explanation

Question 2 of 20

1

A homeowner plans to build a house out in Las Vegas, Nevada, in the middle of the desert. It would be in his/her best interest to lower the "solar load," to locate most of the windows on the __________.

Select one of the following:

  • west side of the house

  • east side of the house

  • north side of the house

  • south side of the house

Explanation

Question 3 of 20

1

The solar load on a structure is the heat gain resulting from the __________.

Select one of the following:

  • heat from the surrounding air conducted through the materials of the structure

  • air infiltration

  • heat from the radiation from the sun

  • dry-bulb inside the structure

Explanation

Question 4 of 20

1

More than one evaporator coil circuit is used when __________.

Select one of the following:

  • a slant coil is at an angle more than 60°

  • the evaporator is located outside the conditioned area

  • there would be excessive refrigerant pressure drop in the coil circuit

  • a distributor would not be practical

Explanation

Question 5 of 20

1

A popular material combination used in air conditioning evaporators and condensers is __________.

Select one of the following:

  • copper tube-copper fin

  • copper tube-stainless steel fin

  • aluminum tube-aluminum fin

  • copper tube-aluminum fin

Explanation

Question 6 of 20

1

In reciprocating and scroll type motor-compressor assemblies, the motor is cooled by __________.

Select one of the following:

  • liquid refrigerant by-passed from the liquid line

  • discharge gas from the compressor

  • suction gas returning to the compressor

  • air over the shell of the assembly

Explanation

Question 7 of 20

1

In rotary type motor-compressor assemblies, the motor is cooled by ____.

Select one of the following:

  • discharge gas from the compressor

  • liquid refrigerant by-passed from the liquid line

  • air over the shell of the assembly

  • suction gas returning to the compressor

Explanation

Question 8 of 20

1

A dirty condenser coil can lead to ____.

Select one of the following:

  • increased efficiency

  • reduced efficiency

  • increased heat transfer

  • increased subcooling

Explanation

Question 9 of 20

1

High efficiency condensers ____.

Select one of the following:

  • are located in separate cabinets

  • have stainless steel coils

  • have more surface area than standard condensers

  • can withstand higher pressures than standard condensers

Explanation

Question 10 of 20

1

The package air-conditioning system is _____ than the split system because it is completely factory assembled and charged with refrigerant.

Select one of the following:

  • less efficient

  • slightly less efficient

  • slightly quieter

  • more efficient

Explanation

Question 11 of 20

1

On a package air conditioning system, which refrigerant lines must be field installed?

Select one of the following:

  • discharge and suction

  • discharge and liquid

  • liquid and suction

  • No lines need to be installed

Explanation

Question 12 of 20

1

On a split air conditioning system with a remote condensing unit, which refrigerant lines must be field installed?

Select one of the following:

  • liquid and suction

  • discharge and suction

  • No lines need to be installed

  • discharge and liquid

Explanation

Question 13 of 20

1

The air temperature of the air off an evaporative cooler is ____.

Select one of the following:

  • cooler than the entering air

  • made up of sensible heat only

  • a constant 32 degrees

  • the same as the entering air

Explanation

Question 14 of 20

1

The humidity difference in the 2 different locations (different parts of the country) must be accounted for in the conditioning equipment choice.

Select one of the following:

  • True
  • False

Explanation

Question 15 of 20

1

The all-aluminum coil has a higher heat transfer rate than the standard copper tube-aluminum fin coil.

Select one of the following:

  • True
  • False

Explanation

Question 16 of 20

1

Leaks in all-aluminum coils are easier to repair than the standard copper tube-aluminum fin coil.

Select one of the following:

  • True
  • False

Explanation

Question 17 of 20

1

Equipment will perform at it’s best efficiency when running at full load.

Select one of the following:

  • True
  • False

Explanation

Question 18 of 20

1

If a residential split air conditioning system has a compressor equipped with a start capacitor and relay, it is probably using a thermostatic expansion valve as a metering device.

Select one of the following:

  • True
  • False

Explanation

Question 19 of 20

1

The supply duct portion of an air handling system needs to be insulated when run through an unconditioned space.

Select one of the following:

  • True
  • False

Explanation

Question 20 of 20

1

The return duct portion of an air handling system never needs to be insulated.

Select one of the following:

  • True
  • False

Explanation

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