A. Water
B. Ammonia
C. Freon
D. Brine
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Related Mcqs:
- The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?
- A. Kinematic viscosity B. Work C. Temperature D. None of these...
- Refrigerants commonly used for domestic refrigerators are_________________?
- A. Ethyl chloride or methyl chloride B. Freon-12 C. Propane D. NH3 or CO2...
- Noise level inside a jet airliner in normal flight is about ______________ decibels?
- A. 80 B. 100 C. 125 D. 150...
- Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is_____________________?
- A. Positive B. Negative C. Zero D. Infinity...
- For an incompressible fluid, the _______________ is a function of both pressure as well as temperature?
- A. Internal energy B. Enthalpy C. Entropy D. All (A), B. & (C)...
- In an ideal refrigeration cycle, the change in internal energy of the fluid is_____________?
- A. +ve B. -ve C. 0 D. Either of the above three; depends on the nature of refrigerant...
- The internal energy of an incompressible fluid depends upon its_________________?
- A. Pressure B. Temperature C. Both A. & B D. Neither A. nor B...
- Gibbs free energy of a pure fluid approaches _____________ as the pressure tends to zero at constant temperature?
- A. Infinity B. Minus infinity C. Zero D. None of these...
- In a turbine, the fluid expands almost_________________?
- A. Isothermally B. Isobarically C. Adiabatically D. None of these...
- In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (ζ) and thermal diffusivity (α). The units of these quantities are ?
- A. μ , α and θ all have units of m/s B. μ , α and θ all have units of m2/s C. α and θ have units of m2/s, while μ has unit of m/s D. α and θ have units of m/s, while μ has unit of m2/s...
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