The difference between dry bulb temperature and wet bulb temperature, is called

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning Comments

Question
The difference between dry bulb temperature and wet bulb temperature, is called
Options
A. dry bulb depression
B. wet bulb depression
C. dew point depression
D. degree of saturation

Correct Answer

wet bulb depression

Heat Transfer, Refrigeration and Air Conditioning problems

Search Results

1. While designing the refrigeration system of an aircraft, the prime consideration is that the
Options
A. system has high C.O.P.
B. power per TR is low
C. mass of refrigerant circulated in the system is low
D. mass of the refrigeration equipment is low

2. A perfect black body is one which
Options
A. is black in colour
B. absorbs heat radiations of all wave lengths falling on it
C. reflects all the heat radiations
D. transmits the heat radiations

3. A refrigeration system
Options
A. removes heat from a low temperature body and delivers it to a high temperature body
B. removes heat from a high temperature body and delivers it to a low temperature body
C. rejects energy to a low temperature body
D. none of the above

4. Thermal conductivity of water __________ with rise in temperature.
Options
A. remains same
B. decreases
C. increases
D. may increase or decrease depending upon temperature

5. Reynolds number (R_N) is given by (where h = Film coefficient, l = Linear dimension, V = Velocity of fluid, k = Thermal conductivity, t = Temperature, ? = Density of fluid, c_p = Specific heat at constant pressure, and ? = Coefficient of absolute viscosity)
Options
A.
B.
C.
D.

8. The relative humidity is defined as
Options
A. the mass of water vapour present in 1 m³ of dry air
B. the mass of water vapour present in 1 kg of dry air
C. 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.
D. 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

10. In aqua-ammonia and Lithium-bromide water absorption refrigeration systems, the refrigerants are respectively
Options
A. water and water
B. water and lithium bromide
C. ammonia and lithium bromide
D. ammonia and water

Comments

More in Mechanical Engineering: