MCQ On Difference Between Air Conditioning And Refrigeration

Education Journalist | Study Abroad Lead

MCQ on Difference Between Air Conditioning And Refrigeration are covered in this article with answers and detailed explanation. Air conditioning and refrigeration are mainly used for the same purpose that is cooling but the applications are a little different. The parts of air conditioning and refrigeration are slightly different.

Ques. For obtaining high COP, the pressure range of the compressor should be.

Low
High
Optimum
None of the above

Click here for the answer

Ans. a. Low

Explanation: For obtaining high COP, the pressure range of the compressor should be low.

Ques. In a refrigeration system, the expansion device is connected between the –

Evaporator and compressor
Compressor and condenser
Receiver and evaporator
Condenser and receiver

Click here for the answer

Ans. c. Receiver and evaporator

Explanation: In a refrigeration system, the expansion device is connected between the receiver and evaporator

Ques. A reversible engine has an ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be –

2.33
3.33
4.33
6.33

Click here for the answer

Ans. a. 2.33

Explanation: A reversible engine has an ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 2.33

Ques. The condition of refrigerant after passing through the condenser in a vapour compression system is –

Wet vapour
Saturated liquid
Superheated vapour
Dry saturated vapour

Click here for the answer

Ans. Saturated Liquid

Explanation: The condition of refrigerant after passing through the condenser in a vapour compression system is saturated Liquid

Ques. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about –

1
1.25
2.15
5.12

Click here for the answer

Ans. b. 1.25

Explanation: Heat rejection factor = (Heat rejected/Heat absorbed).

Here, COP = 7.942.

Implies, Q(rejected) = 1.12*Q (absorbed).

Hence, HRF = 1.12.

Also Check:

Topics From Current Electricity
Electric Current Formula	Types of Current	Unit of Current
Difference between emf and voltage	Unit of Resistance	Ohm’s Law And its Limitations
Electrical Current	Current density formula	Difference between earth and neutral
Unit of Voltage	Power Of Alternating Current	Difference between AC and DC
Electric Current	Circuit Diagram	Electromotive Force

Ques. In a refrigeration cycle, the flow of refrigerant is controlled by –

Expansion valve
Compressor
Evaporator
Condenser

Click here for the answer

Ans. a. Expansion Valve

Explanation: The flow of refrigerant is controlled by the expansion valve.

Ques. Rating of a domestic refrigerator is of the order of –

10 tons
0.1 ton
40 tons
5 tons

Click here for the answer

Ans. b. 0.1

Explanation: The rating of a domestic refrigerator is 0.1

Ques. For air conditioning in the operation theatre in a hospital, the percentage of outside air in the air supplied is

100
Zero
50
20

Click here for the answer

Ans. 100

Explanation: The percentage of outside air in the operation theatre in a hospital is required is 100.

Ques. During sensible cooling of air ________ decreases

Relative humidity
Wet bulb temperature
Specific humidity
Dry bulb temperature

Click here for the answer

Ans. Dry bulb temperature

Explanation: During sensible cooling of air dry bulb temperature decreases.

Ques. The process, generally used in winter air-conditioning to warm and humidify the air, is called

Humidification
Dehumidification
Heating and humidification
Cooling and dehumidification

Click here for the answer

Ans. Heating and humidification

Explanation: The process, generally used in winter air-conditioning to warm and humidify the air, is called heating and humidification.

Ques. In aircraft, the air refrigeration cycle is used because of (1 Marks)

High heat transfer rate
Low weight per tonne of refrigeration
Higher coefficient of performance
Low temperature at high altitudes

Click here for the answer

Ans. Low weight per tonne of refrigeration

Explanation: The air refrigeration cycle n aircraft is used because of the low weight per tonne of refrigeration.

Also Check:

Study Guides
Class 12 Notes	NCERT Solutions for Class 12 Maths	Important Physics Constants
Important Physics Constants	CBSE Class 12 Physics Practicals	SI Units in Physics
Class 12 Physics Book Pdf	Class 12 Physics Notes	Important Physics Derivations
Class 12 PCMB Textbooks	NCERT Class 12 PCMB Textbook	Class 12 PCMB Notes
NCERT Solutions for Class 12 Chemistry	NCERT Class 12 Textbook	NCERT Solutions for Class 12 Physics
Class 12 English Book Pdf	NCERT Solutions for Class 12 Chemistry	Important Physics Formulae
Class 12 Maths Book Pdf	Class 11 Notes	NCERT Solutions for Class 12 Biology
Important Physics MCQs	Comparison Articles in Physics	Important Physics Derivations
Periodic Table	Chemical Reactions	NCERT Solutions for Class 6 to 12

CBSE CLASS XII Related Questions

1.
Capacitors are manufactured with certain standard capacitances and working voltages. However, these standard values may not be the ones that are actually needed in a particular application. Two or more capacitors can be grouped in series or in parallel to achieve desired capacitance and voltage. When connected in series, the total capacitance decreases while the voltage rating increases, whereas in parallel connections, the total capacitance increases and maintains the same voltage rating. A capacitor stores energy in the electric field between its plates and stored energy is proportional to the square of the voltage and capacitance $U = \frac{1}{2}CV^2$, where symbols have their usual meanings.
Two capacitors, one of $3 \ \mu$F and the other of $6 \ \mu$F, are connected in series in the circuit as shown in the figure, for a long time. }
2.
The resistance of a metal wire at $ 20^\circ \text{C} $ is $ 1.05 \, \Omega $ and at $ 100^\circ \text{C} $ is $ 1.38 \, \Omega $. Determine the temperature coefficient of resistivity of this metal.
View Solution
3.
Read the following paragraph and answer the questions that follow.
In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.
4.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?
View Solution
5.
An electric field $\vec{E}$ is established across the ends of a cylindrical conductor of length L and area of cross-section A. Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.
View Solution
6.
Consider the nuclear reaction $ X \to Y + Z $. Let $ M_x $, $ M_y $, and $ M_z $ be the masses of the three nuclei X, Y, and Z respectively. Then which of the following relations hold true?
- $ (M_x - M_z)<M_y $
- $ (M_x - M_y)<M_z $
- $ M_x>(M_y + M_z) $
- $ M_x<(M_y + M_z) $
View Solution