Freezing at the expansion valve
Restriction to refrigerant flow
Corrosion of steel plates
All of these
D. All of these
Horizontal line
Vertical line
Inclined line
Curved line
50 kcal/ min
50 kcal/ hr
80 kcal/ min
80 kcal/ hr
A refrigerant should have low latent heat
If operating temperature of system is low, then refrigerant with low boiling point should be used
Pre-cooling and sub-cooling bf refrigerant are same
Superheat and sensible heat of a refrigerant are same
Heated and dehumidified
Heated and humidified
Cooled and humidified
Cooled and dehumidified
Lithium bromide is used as a refrigerant and water as an absorbent
Water is used as a refrigerant and lithium bromide as an absorbent
Ammonia is used as a refrigerant and lithium bromide as an absorbent
None of the above
Heat of compression
Work done by compressor
Enthalpy increase in compressor
All of the above
Halide torch
Sulphur sticks
Soap and water
All of these
CO₂
Ammonia
R-12
All of these
R-11
R-12
R-22
Ammonia
Carbon dioxide
Sulphur dioxide
Lithium bromide
R-12
Same
Less
More
None of these
System has high C.O.P.
Power per TR is low
Mass of refrigerant circulated in the system is low
Mass of the refrigeration equipment is low
Low weight per tonne of refrigeration
High heat transfer rate
Low temperature at high altitudes
Higher coefficient of performance
Non-toxic
Non-flammable
Non-explosive
High boiling point
Freon-11
Freon-22
CO2
Ammonia
Receiver
Expansion valve
Evaporator
Compressor discharge
Before entering the compressor
After leaving the compressor
Before entering the condenser
After leaving the condenser
Equalise
Reduce
Increase
None of these
Small
High
Equal
Anything
Brass
Copper
Steel
Aluminium
Higher in winter than in summer
Lower in winter than in summer
Same in winter and summer
Not dependent on season
Room sensible heat load only
Room latent heat load only
Both room sensible heat and latent heat loads
None of the above
Condenser
Evaporator
Absorber
None of these
Temperature, pressure and enthalpy
Specific volume and enthalpy
Temperature and enthalpy
Temperature, pressure, specific volume and enthalpy
Compressor
Condenser
Evaporator
Expansion valve
Increase
Decrease
Remain unaffected
May increase or decrease depending on the type of refrigerant used
[T₁ (T₂ - T₃)] / [T₃ (T₁ - T₂)]
[T₃ (T₁ - T₂)]/ [T₁ (T₂ - T₃)]
[T₁ (T₁ - T₂)] / [T₃ (T₂ - T₃)]
[T₃ (T₂ - T₃)] / [T₁ (T₁ - T₂)]
Remains constant
Increases
Decreases
None of these
Coefficient of performance of refrigeration
Coefficient of performance of heat pump
Relative coefficient of performance
Refrigerating efficiency
Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle
Reversed Rankine cycle