Process Control & Instrumentation Mcqs for Chemical

Q.  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


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ____________ in the electrical resistance of the wire ?
Category: Chemical Engineering Mcqs,   Published by: T-Code Scripts
MCQs:  Which of the following is not a composition measuring instrument ?
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MCQs:  Response of a linear control system for a change in set point is called __________________?
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MCQs:  Stroboscope is used for the measurement of _________________?
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MCQs:  Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is __________________?
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MCQs:  Conversion formula for converting amplitude ratio (AR) into decibels is ________________?
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MCQs:  Liquid flow rate in an open channel cannot be measured by a/an __________________?
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MCQs:  Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an_______________?
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MCQs:  Which of the following is never used as an element of industrial resistance thermometer ?
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MCQs:  Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?
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MCQs:  Hot wire anemometer is used for the measurement of___________________?
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MCQs:  Phase lag of the sinusoidal response of a first order system is _________________?
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MCQs:  When the damping co-efficient (ξ) is unity, the system is __________________?
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MCQs:  A system with transfer function [(2S/4S) + 1] is of _____________ order?
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MCQs:  Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an ________________?
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MCQs:  Platinum resistance thermometer is the international standard for temperature measurement between __________________?
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MCQs:  Which of the following thermocouple materials does not contain nickel ?
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MCQs:  To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?
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MCQs:  Specific gravity of a liquid cannot be measured by a/an __________________?
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MCQs:  Mass spectrometer is used for the composition analysis of____________________?
Category: Chemical Engineering Mcqs,   Published by: T-Code Scripts