Related Questions

The amount of radiation mainly depends on
A Nature of body
B Temperature of body
C Type of surface of body
D All of the above
The incoming short-wave solar radiation is balanced by an equal amount of long-wave radiation from earth going back to space. This is known as ________
A Earth radiation
B Wave balance of earth
C Heat balance of earth
D Radiation exchange
Erosion of soil by a river mainly depends upon ________
A Its depth
B Its length
C Its speed at which it flows
D Its width
The amount of combustible escaping uncon-sumed from the furnace, depends upon the
A Air supplied and furnace temperature
B Burner design (thoroughness of mixing versus stratification)
C Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)
D All of the above
Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the
A Physical nature, ash content and fineness of the coal
B Amount of excess air supplied and load on the boiler
C Type of burner and combustion chamber
D All of the above
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
A Reduces the contrast of the image and also its sharpness
B Increases the contrast of the image but reduces the sharpness
C Increases both the contrast and sharpness
D Reduces the contrast but increases the sharpness
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
A Global warming
B Green house
C Atmospheric effect
D Ionosphere
Arman wanted to have Tk. 39,200 as interest after 5 years. He has invested an amount in an account for 1 year at 8% interest rate. From the 2nd year, he invested the principal amount in another account offering 10% interest for 3 years. At the beginning of the fifth year he invested the Principal amount in another account at the rate of 11%. What was the principal amount? (assume simple interest rate)
A Tk. 50,000
B Tk. 80,000
C Tk. 70,000
D Tk. 90,000
E None of them
Radiation heat transfer rates does not depend upon the
A Type of absorbing surface
B Distance between the heat source and the object receiving the heat
C Surface area and temperature of the heat source
D None of these
The rate of emission of radiation by a body does not depend upon the
A Wavelength of radiation
B Surface temperature of the body
C Nature of the surface
D Shape and porosity of the body

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