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ENGINEERS' DAY QUIZ BY ISHRAE

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

  1. The chemical components of HCFC refrigerants are

a)

  1. Hydrogen, Chlorine, Freon, and Carbon

b)

  1. Hydrogen, Chlorine, Fluorine, and Carbon

c)

  1. Helium, Chlorine, Freon, and Carbon

d)

  1. Helium, Chlorine, Fluorine, and Carbon

2.

  1. What is the primary environmental concern associated with HCFC refrigerants?

a)

  1. Water pollution

b)

  1. Global warming

c)

  1. Soil contamination

d)

  1. Ozone depletion

3.

  1. The refrigerant in a mechanical compression refrigeration system absorbs and releases heat by

a)

  1. Changing its temperature

b)

  1. Changing its molecular composition

c)

  1. Changing its physical state

d)

  1. Converting heat to work

4.

  1. Which of the following devices can respond to changes in refrigeration conditions?

a)

Throttle Valve

b)

  1. Orifice

c)

  2. Capillary tube

d)

  1. Thermostatic expansion valve

5.

  1. The three basic types of condensers used with HVAC/R systems are

a)

  1. Air cooled, water cooled, and evaporative

b)

  1. External, internal, and cross-charged

c)

  1. Condensing, non-condensing, and static

d)

  1. Standard, metric, and transitional

6.

  1. The purpose of the condenser in a refrigeration system is to 

a)

  1. Absorb heat into the refrigerant

b)

  1. Reject heat from the refrigerant

c)

  1. Condense water vapor in the atmosphere

d)

  2. Reject heat from the condensing medium

7.

  1. Which of the following is a common method for leak detection in refrigeration systems?

a)

  1. Ultrasonic testing

b)

  1. Visual inspection

c)

  1. Pressure testing

d)

  1. All of the above

8.

  1. Besides improving efficiency, insulating the suction line:

a)

  1. Prevents moisture from condensing on the line

b)

  1. Prevents stray electrical current from traveling down the pipe

c)

  1. Serves as a backup sealing system to prevent refrigerant loss

d)

  1. Reduces mechanical vibrations set up by the compressor

9.

The component of an Air Conditioning system that absorbs heat from indoor air is

a)

Condenser

b)

Throttle Valve

c)

Evaporator

d)

  1. Compressor

10.

  1. Tube in tube, shell and coil, and shell and tube are all different types of 

a)

  1. Evaporative condensers

b)

  1. Natural draft condensers

c)

  1. Water cooled condensers

d)

  1. Air cooled condensers

11.

  1. All vapor compression refrigeration compressors are designed to pressurize

a)

  1. Only liquid

b)

  1. Only vapor

c)

  1. Mostly vapor plus small quantities of liquid

d)

  1. Mostly liquid with small quantities of vapor

12.

  1. Select the refrigerant having non zero ozone depletion potential.

a)

Carbon Dioxide

b)

hydrochlorofluorocarbon

c)

Water

d)

Ammonia

13.

  1. Water vapor in the air condenses on the evaporator coil

a)

  1. whenever there is moisture in the refrigerant

b)

even when the system is not operating

c)

  1. whenever the system is operating

d)

  1. whenever the evaporator temperature is below dew point temperature of the air

14.

  1. A refrigerant is

a)

  1. The fluid used in a refrigeration system for transferring heat

b)

  1. A fluid that is naturally cold

c)

  1. A fluid that can turn heat into work

d)

  1. A hydrocarbon based chemical with noble elements replacing some of the hydrogen atoms

15.

  1. Which type of condenser requires the most maintenance?

a)


Condensers do not require maintenance

b)

  1. Water cooled condensers

c)

  1. Air cooled condensers

d)

  1. The maintenance requirements for air cooled and water cooled condensers are comparable.

16.

What role do ventilation systems play in indoor air quality management?

a)

increase the concentration of outdoor air pollutants

b)

reduce the humidity levels

c)

remove indoor air pollutants and introduce fresh air

d)

regulate the temperature of the supply air

17.

  1. Who developed the first modern air conditioning system?

a)

  1. Harold Goodman

b)

  1. Willis Carrier

c)

  1. James Trane

d)

  2. Dave Lennox

18.

  1. Refrigerant piping must be able to adequately carry both refrigerant and

a)

  1. Oil

b)

  1. Nitrogen

c)

  1. Air

d)

  1. Heat

19.

  1. New residential air conditioning systems now primarily use

a)

  1. R-12

b)

  1. R-22

c)

  1. R-134a

d)

  1. R-410A

20.

  1. The chemical in CFCs that contributes to ozone depletion is

a)

  1. Fluorine

b)

  1. Carbon

c)

  1. Chlorine

d)

  1. Freon

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