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Worksheets

Ref System

Total questions: 15

Worksheet time: 10mins

Name
Class
Date
1.

Energy required to change the fluid phase from one form to another.

(a)  

2.

Temperature remains constantas SOLID turns to LIQUID. (qef=334 KJ/kg)

(a)  

3.

Temperature remains constantas LIQUID turns to GAS. (qfg=2257 KJ/kg)

(a)  

4.

Curve that shows the boundary between phases on a property diagram.

(a)  

5.

Contain 1 or more of the three halogens (Chloine, Fluorine, Bromine).

a)

Halocarbons

b)

Hydrocarbons

c)

Inorganic Compounds

d)

Azeotropic Mixtures

e)

Non-Azeotropic Mixtures

6.

Consists of carbon and hydrogen (methane, ethane, propane).

a)

Halocarbons

b)

Hydrocarbons

c)

Inorganic Compounds

d)

Azeotropic Mixtures

e)

Non-Azeotropic Mixtures

7.

Lacks carbon-hydrogen bonds (ammonia, water).

a)

Halocarbons

b)

Hydrocarbons

c)

Inorganic Compounds

d)

Azeotropic Mixtures

e)

Non-Azeotropic Mixtures

8.

Consists of 2 substances having different properties but behaving as a single substance.

a)

Halocarbons

b)

Hydrocarbons

c)

Inorganic Compounds

d)

Azeotropic Mixtures

e)

Non-Azeotropic Mixtures

9.

A fluid consisting of multiple components of different volatiles that, when used in ref cycles, change composition during evaporation or condensation.

a)

Halocarbons

b)

Hydrocarbons

c)

Inorganic Compounds

d)

Azeotropic Mixtures

e)

Non-Azeotropic Mixtures

10.

A method of fitting the data points to represent the value of a function.

(a)  

11.

refrigerating effect is decreased; work required is increased.

a)

Suction Pressure

b)

Delivery Pressure

c)

Supreheating

d)

Subcooling

e)

Suction Temp. and Condenser Temp.

12.

decreased suction pressure is more predominant than increased discharge pressure.

a)

Suction Pressure

b)

Delivery Pressure

c)

Supreheating

d)

Subcooling

e)

Suction Temp. and Condenser Temp.

13.

increased refrigerating effect but also increase amount of work spent to attain the upper pressure limit.

a)

Suction Pressure

b)

Delivery Pressure

c)

Supreheating

d)

Subcooling

e)

Suction Temp. and Condenser Temp.

14.

increased the refrigerating effect; results in increase of COP provided that no further energy has to be spent to obtain the extra cold coolant required.

a)

Suction Pressure

b)

Delivery Pressure

c)

Supreheating

d)

Subcooling

e)

Suction Temp. and Condenser Temp.

15.

the perfromance of a vapor compression refrigeration system depends on both vaporizing and condensing temperatures.

a)

Suction Pressure

b)

Delivery Pressure

c)

Supreheating

d)

Subcooling

e)

Suction Temp. and Condenser Temp.