k/h0
2k/h0
h0/k
h0/2k
✅ The correct answer is option B.
Heat Transfer
The wave length of the radiation emitted depends only on the temperature and is independent of the material of the body.
TRUE
FALSE
✅ The correct answer is option A.
In aircraft, air refrigeration Cycle is used because of
low weight per tonne of refrigeration
high heat transfer rate
low temperature at high altitudes
higher coefficient of
✅ The correct answer is option A.
The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
Wien’s law
Stefan’s law
Kirchhoff’s law
Planck’s law
✅ The correct answer is option C.
Radiation is the process of heat transfer in which heat flows from a __________ , in a straight line, without affecting the intervening medium.
cold body to hot body
hot body to cold body
smaller body to larger body
larger body to smaller
✅ The correct answer is option B.
Air conditioning means
cooling
heating
dehumidifying
all of these
✅ The correct answer is option D.
The reduced ambient air cooling system has
one cooling turbine and one heat exchanger
one cooling turbine and two heat exchangers
two cooling turbines and one heat exchanger
two cooling turbines a
✅ The correct answer is option C.
The super-heating in a refrigeration cycle
does not alter C.O.P.
increases C.O.P.
decreases C.O.P.
none of these
✅ The correct answer is option C.
The difference between dry bulb temperature and dew point temperature, is called
dry bulb depression
wet bulb depression
dew point depression
degree of saturation
✅ The correct answer is option C.
The vertical and uniformly spaced lines on a psychrometric chart indicates
dry bulb temperature
wet bulb temperature
dew point temperature
specific humidity
✅ The correct answer is option A.