Related Questions

Temperature of __________ can not be measured by an optical or radiation pyrometer.
A Hot blast (air) from stoves
B Molten slag flowing out of blast furnace
C Combustion space in boilers
D Rotary limestone calcination kiln
Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the
A Enhancement or attentuation of redia-tion occurs in the sighting path
B Object and surrounding are at almost the same temperature
C Object has varying emissivity
D Object is transparent
Working principle of disappearing filament type optical pyrometer is based on the
A Wien's law
B Seebeck effect
C Kirchoff's law
D Peltier effect
Working principle of radiation pyrometer is based on the
A Wien's law
B Kirchoffs law
C Stafan-Boltzman law
D Seebeck effect
Which of the following is not classified as a thermo electric pyrometer?
A Resistance thermometer
B Thermocouple
C Optical pyrometer (disappearing filament type)
D Radiation pyrometer
Which of the following is a 'contact' pyrometer?
A Resistance pyrometer
B Optical pyrometer
C Radiation pyrometer
D Infra red pyrometer
Which one of the following thermometers is known as pyrometer?
A Thermo-electric thermometers
B Radiation thermometers
C Gas thermometers
D Liquid thermometers
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
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

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