CBSE-CLASS-XII SERIES Air-conditioning-and-refrigeration
Refrigeration Devices
18 previous year questions.
Volume: 18 Ques
Yield: Medium
High-Yield Trend
18
2025 Chapter Questions 18 MCQs
01
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Give an example of an eco-friendly refrigerant and also write its properties.
02
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Draw the labelled layout of a cold storage plant.
03
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Write the properties of R-12.
04
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
What is a refrigerant? Give two examples.
05
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
The refrigerant R-22 is:
1
Monochloro trifluoro methane
2
Dichloro difluoro methane
3
Tetrachloro difluoro ethane
4
Trichloro monofluoro methane
06
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
The refrigerant ammonia is:
1
R-717
2
R-134
3
R-718
4
R-152
07
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
The principle of evaporative cooling is not used in:
1
Ice plant
2
Dessert cooler
3
Earthen pot
4
Acetone poured on skin
08
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
In a window air conditioner, ............ type of evaporator is used.
1
Plate surface evaporator
2
Bare-tube evaporator
3
Finned evaporator
4
Both (A) and (B)
09
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
It starts operating when the pressure in the suction line falls below a pre-determined value:
1
Overload protector
2
Relay
3
L.P. cutout
4
H.P. cutout
10
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
The condenser used in a domestic refrigerator:
1
Water cooled condenser
2
Evaporative condenser
3
Air cooled condenser
4
Double tube condenser
11
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Thermostatic expansion valve operates by responding to ...........
1
Load
2
Degree of superheat
3
Temperature
4
Pressure
12
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Automatic expansion valve is also known as:
1
Thermostatic expansion valve
2
Float valve
3
Constant pressure expansion valve
4
Capillary tube
13
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Dairy refrigeration includes:
1
Meat preservation
2
Refrigeration of milk and butter
3
Ice making
4
Preserving potatoes
14
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
The evaporator generally used in wine cooling is:
1
Double tube evaporator
2
Shell and tube evaporator
3
Plate evaporator
4
Finned evaporator
15
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
It starts operating when the pressure in the discharge line rises above a certain predetermined pressure.
1
L.P. cutout
2
Relay
3
Overload protector
4
H.P. cutout
16
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
Brine is used as a secondary refrigerant in:
1
Domestic refrigerator
2
Ice plant
3
Window air conditioner
4
Freezer
17
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
It is a type of relay:
1
H.P. cutout
2
L.P. cutout
3
Motor
4
Hot wire
18
PYQ 2025
medium
air-conditioning-and-refrigeration ID: cbse-cla
It is not a water cooled condenser:
1
Evaporative condenser
2
Double tube condenser
3
Shell and coil condenser
4
Shell and tube condenser
About Refrigeration Devices - CBSE-CLASS-XII
Refrigeration Devices is a vital chapter for CBSE-CLASS-XII aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on Refrigeration Devices PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within Refrigeration Devices carry the most weight. Then, tackle the questions iteratively to solidify your understanding.