WorksheetsVCR and mixture review
Total questions: 10
Worksheet time: 5mins
What are the equipment that utilizes the Vapor-Compression Refrigeration Cycle?
Heating stoves
Air Conditioning
Microwaves
Refrigerators
Which of the following statements is CORRECT?
In the VCR, the evaporator and condenser are heat exchangers.
In the VCR, the evaporator operates at higher pressure than condenser.
The Compressor condenses R134A vapor into saturated liquid
Across the expansion valve, temperature of R134A remains constant.
Identify the stage where Isentropic Compression takes place in the VCR.
4-1
1-2
2-3
3-4
Which of the following assumptions to the First Law are true in the Condenser?
ΔEk = ΔEp = Ws = 0
ΔH = ΔEk = ΔEp = 0
Ws = Q = ΔH = 0
ΔEk = Q = ΔH goes to infinity
What is the purpose of the throttling device in the refrigeration cycle?
To decrease temperature such that R134A becomes a refrigerant.
To increase temperature such that R134A can vaporise to a saturated vapor
To increase pressure such that R134A condenses into a liquid.
To decrease pressure such that R134A becomes a sat. vapour/liquid mixture.
Which one of the following pair is not correct? i.e. (end of) stage - state of R134A
Compressor - superheated Vapor
Condenser - saturated liquid
Throttling Valve - saturated vapor
Evaporator - saturated vapor
What law states that the entropy of a pure perfect crystal is zero at 0 K?
Third Law of Thermodynamics
Second Law of Thermodynamics
First Law of Thermodynamics
Zeroth Law of Thermodynamics
What is the use of the Generalized Compressibility Chart in real gas behavior?
To determine the compressibility factor Z for use in the ideal gas equation
To determine the critical temperature of a substance
To calculate the molar volume of a solution
To find the Henry's Law constant for a solute
What parameter of an mixture can be used in the direct calculation of mixed properties such as Mmix, Pi, Cp,mix?
specific enthalpy, h
vapor mole fraction, y
number of moles, n
individual molecular weight, Mw
Which law describes the behavior of ideally dilute solutions?
Boyle's Law
Henry's Law
Charles's Law
Raoult's Law
