WorksheetsETAPA 4 (1-33)
Total questions: 33
Worksheet time: 33mins
Name
Class
Date
1.
What causes CFC refrigerants to break down in the upper atmosphere?
a)
Heat
b)
UV rays from the sun
c)
Chlorine in the refrigerant
d)
Water vapor
2.
Removing refrigerant from a system and depositing it into an approved container is to ______ the refrigerant.
a)
Reclaim
b)
Recycle
c)
Recover
d)
Reuse
3.
Removing refrigerant, processing it on-site, then reintroducing it back into the system is to ______ the refrigerant.
a)
Reclaim
b)
Recover
c)
Recycle
d)
Reuse
4.
Removing refrigerant from a system, depositing it into an approved container, and arranging for reprocessing to out-of-the-box quality is to ______ the refrigerant.
a)
Reclaim
b)
Recover
c)
Recycle
d)
Reuse
5.
Removing refrigerant from a system and depositing it into an approved container; arranging for the refrigerant to be reprocessed back to “out-of-the-box” quality so that it may be reused as a new product in industry is to ________ the refrigerant
a)
Reclaim
b)
Recover
c)
Recicle
d)
Reuse
6.
Which refrigerant is not a blend?
a)
R-22
b)
R-410A
c)
R-404A
d)
R-502
7.
Which gas exerts the greatest high-side pressures?
a)
R-22
b)
R-134A
c)
R-410A
d)
R-12
8.
Choose the correct statement about R-410A:
a)
R-410A is toxic, non-flammable, high-pressure
b)
R-410A is non-toxic, flammable, high-pressure
c)
R-410A is non-toxic, non-flammable, high-pressure
d)
R-410A is non-toxic, non-flammable, low-pressure
9.
There are no allowable uses of HCFC refrigerants as of:
a)
Jan 1, 2010
b)
Jan 1, 2020
c)
Jan 1, 2030
d)
They are completely banned
10.
Identify the refrigerant with zero ODP but still contributes to Global Warming:
a)
R-22
b)
R-12
c)
R-410A
d)
Ammonia
11.
An example of pure refrigerant is:
a)
R-502
b)
R-404A
c)
R-407C
d)
R-22
12.
An example of pure refrigerant is:
a)
R-502
b)
R-134A
c)
R-404A
d)
R-407C
13.
HCFC refrigerants in refrigeration applications are well compatible with which synthetic lubricant?
a)
Polyolester (POE) oil
b)
Mineral oil (MO)
c)
Alkylbenzene
d)
Whichever recommended by manufacturer
14.
One chlorine or bromine has the capability to breakdown ____ ozone molecules.
a)
10,000
b)
100,000
c)
1,000,000
d)
1,000
15.
R-401A refrigerant is a:
a)
Chlorofluorocarbon CFC
b)
Hydrochlorofluorocarbon HCFC
c)
Hydrofluorocarbon HFC
d)
Hydrochlorocarbon HCC
16.
R-407C refrigerant is a:
a)
Chlorofluorocarbon CFC
b)
Hydrochlorofluorocarbon HCFC
c)
Hydrofluorocarbon HFC
d)
Hydrochlorocarbon HCC
17.
R-12 refrigerant is a:
a)
Chlorofluorocarbon CFC
b)
Hydrochlorofluorocarbon HCFC
c)
Hydrofluorocarbon HFC
d)
Hydrochlorocarbon HCC
18.
R-22 refrigerant is a:
a)
Chlorofluorocarbon CFC
b)
Hydrochlorofluorocarbon HCFC
c)
Hydrofluorocarbon HFC
d)
Hydrochlorocarbon HCC
19.
The amount of heat required to raise the temperature of one pound of water by one-degree Fahrenheit is:
a)
The calorific value of water
b)
One British Thermal Unit
c)
The amount of heat needed to raise the temperature of 1 lb of ice 1°F
d)
The amount of heat needed to raise the temperature of 1 lb of steam 1°F
20.
An employer is:
a)
Responsible for ensuring that safety instruction is provided to workers
b)
Not responsible for ensuring that safety instruction is provided to workers
c)
Responsible for ensuring that workers arrive safely on the job site
d)
Responsible for providing all safety clothing to workers
21.
Comparing the mass/weight of 1 ft³ of the refrigerant R-410A to the mass/weight of 1 ft³ of air, while both are under atmospheric pressure, gives the:
a)
Specific Weight
b)
Density
c)
Specific Volume
d)
Specific Gravity
22.
Density is defined as:
a)
The ratio of the density of a substance to the density of air
b)
The weight per unit volume of a material
c)
The ratio of the density of a substance to the density of water
d)
The mass per unit volume
23.
Specific Heat is defined as:
a)
The amount of heat required to cause a temperature change of one degree
b)
The amount of heat required to change the temperature of 1 lb of a substance 1°F
c)
The energy contained in a substance, determined by measuring the heat produced by the combustion of a specified quantity of that substance
d)
The energy needed to bring a substance into its ignition temperature
24.
Heat Capacity or Thermal Capacity of a substance is defined as:
a)
The amount of heat required to cause a temperature change of one degree of an object
b)
The amount of heat required to change the temperature of 1 lb of a substance 1°F
c)
The quantity of heat produced by the complete combustion of a given mass of a substance
d)
The energy needed to bring a substance into its ignition temperature
25.
Calorific Value of a substance is defined as:
a)
The amount of heat required to raise the temperature of one degree
b)
The amount of heat required to change the temperature of 1 lb of a substance 1°F
c)
The quantity of heat produced by the complete combustion of a given mass of that substance
d)
The energy needed to bring a substance into its ignition temperature
26.
Latent Heat is defined as:
a)
The heat required to change the state of a substance without change of temperature
b)
The temperature at which a substance changes its state
c)
The heat required to change the temperature of a substance
d)
The heat that causes temperature change while a substance is changing state
27.
Sensible Heat is defined as:
a)
The heat required to change the state of a substance without change of temperature
b)
The temperature at which a substance changes its state
c)
The heat required to change the temperature of a substance
d)
The heat that causes temperature change while a substance is changing state
28.
Heat transfer happens:
a)
Only when two substances come into contact
b)
Only when two substances with different temperatures come into contact
c)
Only when there is flow of a vapour or a liquid
d)
None of the choices is correct
29.
What is the term that describes heat transfer through vacuum?
a)
Convection
b)
Conduction
c)
Radiation
d)
Plasma
30.
Identify the correct unit of measurement of capacitance:
a)
Ohms
b)
Watts
c)
µFs
d)
Volts
31.
The procedure for disassembly of a thermostatic expansion valve is to:
a)
Remove sensing bulb from suction line, remove power element, remove cartridge assembly
b)
Remove sensing bulb from suction line, relieve spring pressure, remove power element, remove cartridge assembly
c)
Remove sensing bulb from suction line, relieve spring pressure, remove power element, remove cartridge assembly last
d)
Remove sensing bulb from suction line, relieve spring pressure, remove power element, install cartridge assembly
32.
What condition will happen if the TEV loses its spring tension?
a)
Excessive superheat
b)
Motor overheats
c)
Low superheat, evaporator floods
d)
Both A & B
33.
Which of the following will directly cause a flooded evaporator?
a)
An oversized compressor
b)
A stuck open Thermostatic Expansion Valve (TXV)
c)
Evaporator low-load conditions
d)
Overcharging the system with refrigerant
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