A. Has a slower speed of response
B. Can measure higher temperature
C. Can’t measure the temperature of moving objects
D. Is more affected by corrosive atmosphere
Related Mcqs:
- Photoelectric pyrometers are suitable in the temperature range of ________________ °C?
A. 400-1600
B. 800-1600
C. 800-2500
D. 400-1000 - Temperature of _____________ cannot 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 - Radiation thermometer cannot measure the temperature ___________________?
A. Inside a pressure vessel
B. Of an object without coming in contact with it
C. Of liquid oxygen
D. Of moving objects at high temperature - Starting temperature of optical radiation pyrometer is ______________ °C?
A. 800
B. 400
C. 1200
D. 1500 - Working principle of radiation pyrometer is based on the ________________?
A. Wien’s law
B. Kirchoff’s law
C. Stefan-Boltzmann law
D. Seebeck effect - Working principle of radiation pyrometer is based on the __________________?
A. Wien’s law
B. Kirchoff’s law
C. Stefan Boltzmann law
D. Seebeck effect - Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ?
A. Enhancement or attenuation of radiation occurs in the sighting path
B. Object and surrounding are at almost the same temperature
C. Object has varying emissivity
D. Object is transparent - A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same_________________?
A. Temperature measuring range (- 40°C to 450°C)
B. Accuracy (± 1% of span)
C. Speed of response
D. All a, b & c - A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in_______________?
A. Light intensity
B. Current
C. Flux density
D. Voltage - When the damping co-efficient (ξ) is unity, the system is __________________?
A. Overdamped
B. Critically damped
C. Underdamped
D. Highly fluctuating
