An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

e₁ + e₂

1/e₁ + 1/e₂

(e₁ + e₂)/ e₁ + e₂ - e₁e₂

e₁e₂

e₁ + e₂

1/e₁ + 1/e₂

(e₁ + e₂)/ e₁ + e₂ - e₁e₂

e₁e₂

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

These react with oxygen and cause its depletion

These react with ozone layer

These react with plants and cause greenhouse effect

These react with water vapour and cause acid rain

These react with oxygen and cause its depletion

These react with ozone layer

These react with plants and cause greenhouse effect

These react with water vapour and cause acid rain

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Does not alter C.O.P.

Decreases C.O.P.

None of these

Increases C.O.P.

Does not alter C.O.P.

Decreases C.O.P.

None of these

Increases C.O.P.

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

9: 1

1: 1

1: 9

1: 3

9: 1

1: 1

1: 9

1: 3

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Decreases

Remains constant

None of these

Increases

Decreases

Remains constant

None of these

Increases

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is

The mass of water vapour present in 1 m³ of dry air

The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

The mass of water vapour present in 1 kg of dry air

The mass of water vapour present in 1 m³ of dry air

The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

The mass of water vapour present in 1 kg of dry air

ANSWER DOWNLOAD EXAMIANS APP

Refrigeration and Air Conditioning

Refrigeration and Air Conditioning An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

Refrigeration and Air Conditioning Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

Refrigeration and Air Conditioning The sub-cooling in a refrigeration cycle

Refrigeration and Air Conditioning Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

Refrigeration and Air Conditioning During heating and dehumidification process, dry bulb temperature

Refrigeration and Air Conditioning Degree of saturation or percentage humidity is

Refrigeration and Air Conditioning
An infinite parallel planes with emissivities e₁ and e₂, the interchange factor for radiation from surface 1 to surface 2 is given by

Refrigeration and Air Conditioning
Environmental protection agencies advice against the use of chlorofluorocarbon refrigerants since

Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Refrigeration and Air Conditioning
Degree of saturation or percentage humidity is