Related Questions

Which of the following is not a desirable property of a refrigerant?
A High risibility with oil
B Low boiling point
C Good electrical conductor
D Large latent heat
The undesirable property of a refrigerant is
A Non-toxic
B Non-flammable
C Non-explosive
D High boiling point
High __________ is an undesirable property for a good refrigerant.
A Specific heat
B Latent heat of vaporisation
C Viscosity
D Specific vapor volume
Pick out the undesirable property for a good refrigerant.
A High thermal conductivity
B Low freezing point
C Large latent heat of vaporisation
D High viscosity
Which of the following property is desirable for materials used in tools and machines?
A Elasticity
B Plasticity
C Ductility
D Malleability
Which of the following property is desirable in parts subjected to shock and impact loads?
A Strength
B Stiffness
C Brittleness
D Toughness
Which of the following property is not necessarily desirable in the material for transformer core?
A Mechanical strength
B Low hysteresis loss
C High thermal conductivity
D High permeability
which of the following refrigerant has the lowest freezing point?
A Freon -11
B Freon -12
C Freon -22
D Ammonia
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be
A Lack of cooling water
B Water temperature being high
C Dirty condenser surface
D All of these
Refrigeration in aeroplanes usually employs the following refrigerant
A CO2
B Freon-11
C Freon-22
D Air

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