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Process Instrumentation And Control QUESTIONS AND ANSWERS

Mechanical Engineering : Process Instrumentation And Control QUESTIONS AND ANSWERS :: part4 : 11 to 15

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

11.An apparatus which measures the value of a quantity or condition which is subject to change with time, and operates to maintain within limits this measured value, is called

automatic regulator

self controller

feedback controller

two-position controller

floating regulator.

12.Machine health monitoring is mainly based on measurement of:

lub oil pressure

vibrations at strategic points

bearing temperature measurement

efficiency and losses of machine

all of above.

13.Continuous analysers for measuring following are based on the chemiluminescent flameless reaction with ethylene :

oxygen

ozone

sulphur oxides

nitrogen oxides

pollutants.

14.The time required for the controlled variable to reach a specified value after the application of a step input is called :

rise time

settling time

response time

peak time

proportional time.

15.The error caused in vibration measuring equipment due to non compliance (not stiff) of bond made between sensor and the surface it is mounted is called :

cross-coupling

coupling compliance

influence error

subject loading by sensor

spurious variation in capacitance.

More Process Instrumentation And Control QUESTIONS AND ANSWERS available in next pages