Which of the following of the refrigerant is used as a refrigerant in Lithium Bromide Absorption Refrigeration system?

Consider the following statements regarding vapour absorption systems in the field of refrigeration: 1. In ammonia-water absorption system, ammonia is the refrigerant. 2. In water-lithium bromide system, water is the refrigerant. 3. Ammonia-water absorption reaction is endothermic. 4. The amount of ammonia absorbed by water is inversely proportional to the temperature of ammonia. Which of the above statements are correct?

A

1, 2 and 3

B

1, 3 and 4

C

1, 2 and 4

D

2, 3 and 4

Consider the following statements in respect of a vapour-absorption refrigeration cycle: 1. The absorption refrigeration cycle is generally used when waste heat is a available from an existing source or when free energy like solar energy is to be used. 2. There are no moving parts in the absorption refrigeration plant except a small liquid pump. 3 the value of the coefficient of performance is nearly the same in both vapour-absorption and vapour-compression refrigeration plants. Which of the above statements are correct?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

Which of the refrigerant is used as a refrigerant in Lithium Bromide Absorption Refrigeration system?

A

Ammonia

B

Water

C

Hydrogen

D

Lithium Bromide

In lithium bromide absorption refrigeration system it is not necessary to keep the refrigeration temperature above 0°C.

A

False

B

True

Lithium forms a BCC lattice with an edge length of 350 pm. The experimental density of lithium is 0.53 g cm-3. What is the percentage of missing lithium atoms? (Atomic mass of Lithium = 7 amu)

A

97.7%

B

95.4%

C

4.6%

D

2.3%

Consider the following statements in respect of (l) the temperature of the medium, (m) the refrigerant and (n) the condenser and absorption system- in a refrigeration unit: 1) Temperature of the medium being cooled must be below that of the evaporator. 2) Refrigerant leaves the condenser as liquid. 3) Any solar thermally operated absorption system is capable only of intermittent operation Which of the above statements are correct?

A

1 and 2 only

B

1 and 3 only

C

2 and 3 only

D

1, 2 and 3

When water – Lithium Bromide is used in a vapour absorption refrigeration system, then

A

they together act as refrigerant.

B

water is the refrigerant.

C

lithium bromide is refrigerant.

D

None of these

In a lithium bromide absorption refrigeration system

A

Lithium bromide is used as a refrigerant and water as an absorbent

B

Water is used as a refrigerant and lithium bromide as an absorbent

C

Ammonia is used as a refrigerant and lithium bromide as an absorbent

D

None of the above

Lithium bromide-water vapour is another absorption refrigeration system.

A

true

B

false

In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

A

Water and water

B

Water and lithium bromide

C

Ammonia and lithium bromide

D

Ammonia and water

Which of the following of the refrigerant is used as a refrigerant in Lithium Bromide Absorption Refrigeration system?

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