Quiz Questions

Question 1 1 Marks

How numerical designations of inorganic refrigerants are assigned?

A

Divide 700 to molecular mass of compound

B

Multiply 700 to molecular mass of compound

C

Adding 700 to molecular mass of compound

D

Subtracting 700 from molecular mass of compound

Question 2 1 Marks

Which is the numerical designation of ammonia refrigerant?

A

700 + ( Molecular mass of NH3) = 717

B

700 + (Molecular mass of NH3) = 718

C

700 + (Molecular mass of NH3) = 719

D

700 + (Molecular mass of NH 3) = 720

Question 3 1 Marks

What does the number 4 of R 134a indicate?

A

Number of hydrogen atoms

B

Number of chlorine atoms

C

Number of carbon atoms

D

Number of fluorine atoms

Question 4 1 Marks

Which is the green house gas?

A

Oxygen of atmospheric air

B

Chlorofluoro carbon in air

C

Helium of atmospheric air

D

Neon of atmospheric air

Question 5 1 Marks

Which substance absorbs heat and directly changes its state from solid to vapour?

A

Ice

B

Dry ice

C

Primary refrigerants

D

Secondary refrigerants

Question 6 1 Marks

Where does the ozone layer exist in atmosphere?

A

Mesosphere

B

Stratosphere

C

Ionosphere

D

Exosphere

Question 7 1 Marks

What is the ozone depleting potential of R 134a Refrigerant?

A

0

B

1

C

2

D

3

Question 8 1 Marks

What type of heat is absorbed by primary refrigerant?

A

Total heat

B

Latent heat

C

Specific heat

D

Sensible heat

Question 9 1 Marks

How much is the maximum capacity of refrigerant to be filled in a returnable service cylinder?

A

Up to 95%

B

Up to 90%

C

Up to 85%

D

Up to 80%

Question 10 1 Marks

What is the advantage of universal colour coding of refrigerant cylinders?

A

Easy to identify

B

Make good appearance

C

Prevent corrosion on cylinder

D

Provide extra strength to cylinder

Question 11 1 Marks

What is the effect of releasing HCFC refrigerants to atmosphere?

A

Increases ODP and GWP

B

Decreases GWP and ODP

C

Decreases TEWI

D

Inactive to TEWI

Question 12 1 Marks

How to safe guard the hands while handling glass wool?

A

Wearing goggles

B

Wearing gloves

C

Using mask

D

Using shoes

Question 13 1 Marks

Which international agency standardises the numbering system for identifying refrigerants?

A

ASHRAE

B

ISHRAE

C

DW142

D

ISO

Question 14 1 Marks

Which type of insulating material is used for making ice box to cool beverages?

A

Tar felt

B

Glass wool

C

Fibre glass

D

Thermocole

Question 15 1 Marks

Which property is desirable for an ideal refrigerant?

A

High boiling point

B

High freezing point

C

High specify volume

D

High latent heat value

Question 16 1 Marks

What is the volume of mercury in cm3, if the mass (m) of mercury is 136 grams (g) and density (r) of mercury is 13.6 g/cm3?

A

136 cm3

B

13.6 cm3

C

10.6 cm3

D

10.0 cm3

Question 17 1 Marks

What is the block weighs (W) in kg, if volume (V) is 320 cm3 and density 8.9 g/cm3?

A

2.948 kg

B

2.848 kg

C

2.648 kg

D

2.448

Question 18 1 Marks

What is called mass per unit volume of a substances?

A

Mass

B

Weight

C

Density

D

Volume

Question 19 1 Marks

What is the specific gravity of the metal, if the piece of metal weighs 150 grams in air and 125 grams in water?

A

6

B

10

C

15

D

25

Question 20 1 Marks

What is called the ratio between the density of a substances density of water at 4 Degree Centigrade?

A

Density

B

Specific gravity

C

Mass

D

Weight

Question 21 1 Marks

Which arrow head is correct as per standard? | ಮಾನದಂಡದ ಪ್ರಕಾರ ಯಾವ ಬಾಣದ ಹೆಡ್ ಸರಿಯಾಗಿದೆ?

A

B

C

D

Question 22 1 Marks

Identify the conventional symbol of material? | ವಸ್ತುವಿನ ಕನ್ವೇಷನಲ್ ಚಿಹ್ನೆಯನ್ನು ಗುರುತಿಸಿ?

A

Water | ನೀರು

B

Concrete | ಕಾಂಕ್ರೀಟ್

C

Asbestos | ಆಸ್ಬೆಸ್ಟೋಸ್

D

Glass | ಗಾಜು

Question 23 1 Marks

Which of the following is AC ammeter? | ಈ ಕೆಳಗಿನವುಗಳಲ್ಲಿ ಯಾವುದು AC ಅಮ್ಮೀಟರ್ ಆಗಿದೆ?

A

B

C

D

Question 24 1 Marks

Which symbol is used for butt joints? | ಬಟ್ ಕೀಲುಗಳಿಗೆ ಯಾವ ಚಿಹ್ನೆಯನ್ನು ಬಳಸಲಾಗುತ್ತದೆ?

A

B

C

D

Question 25 1 Marks

Which of the following is used to block the pipe at one end? | ಒಂದು ತುದಿಯಲ್ಲಿ ಪೈಪ್ ಅನ್ನು ನಿರ್ಬಂಧಿಸಲು ಕೆಳಗಿನವುಗಳಲ್ಲಿ ಯಾವುದನ್ನು ಬಳಸಲಾಗುತ್ತದೆ?

A

Plug | ಪ್ಲಗ್

B

Union | ಯೂನಿಯನ್

C

Reducer | ರೆಡ್ಯೂಸರ್

D

Couplings | ಕಪ್ಲಿಂಗ್ಸ್