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MCQs

Total Questions : 107 | Page 3 of 11 pages
Question 21. . The sensitivity of reading of manometer can be increased by :
  1.    Inclining the manometer tube
  2.    Using low specific gravity fluid
  3.    Application of optical magnification
  4.    Use of level sensing device
 Discuss Question
Answer: Option A. -> Inclining the manometer tube
Question 22. . Which gauge can be used to measure pressure below 1
  1.    Dead weight tester
  2.    Pirani gauge
  3.    Ionization gauge
  4.    McLeod gauge
 Discuss Question
Answer: Option C. -> Ionization gauge
Question 23. . A siphon or loop in the connecting pipe is iteiposed as close as possible to the pressure gauge so that :
  1.    Steam can condense to form a seal of water to fill the tube or bellows at the pressure being measured
  2.    Air or vapour collection is avoided
  3.    Moisture formed in pipe can be drained
  4.    Static head errors are eliminated
 Discuss Question
Answer: Option A. -> Steam can condense to form a seal of water to fill the tube or bellows at the pressure being measured
Question 24. . Which is not correct statement about selection of tube material for a Bourdon gauge:
  1.    Have high creep strength to withstand high temperature
  2.    Be stable enough to maintain its calibration indefinitely
  3.    Be immune to corrosion from the fluid inside the tube, and from the atmosphere outside it
  4.    Be hard enough to withstand the applied pressure without any part of it being stressed above the limit of proportionality
 Discuss Question
Answer: Option A. -> Have high creep strength to withstand high temperature
Question 25. . Pick up false statement about pressure measurements :
  1.    Low pressure is normally measured by manometers
  2.    Absolute pressure by piezoelectric crystal.
  3.    Medium and high pressure by Bourdon gauge
  4.    All pressures by transducers
 Discuss Question
Answer: Option B. -> Absolute pressure by piezoelectric crystal.
Question 26. . Pressure gauges are never connected directly to live steam because :
  1.    The tubes or bellows which operate them would be overheated, causing serious error and damage
  2.    Steam if leaks, can cause serious injuries to operatots
  3.    Entry of steam would cause static head error
  4.    Parts of pressure gauge can't withstand temperature of steam
 Discuss Question
Answer: Option A. -> The tubes or bellows which operate them would be overheated, causing serious error and damage
Question 27. . Ring balance gauge is used for measurement of :
  1.    Absolute pressure
  2.    Vacuum 513
  3.    Differential pressure
  4.    Temperature
 Discuss Question
Answer: Option C. -> Differential pressure
Question 28. . When the pressure medium to be measured is air or gas, the pipe is made to rise continuously to the gauge, so that :
  1.    No air or vapour can collect in pipe
  2.    Any moisture can be drained
  3.    Moisture does not come in contact with elements of sensor/gauge
  4.    Moisture can condense to form seal of water
 Discuss Question
Answer: Option B. -> Any moisture can be drained
Question 29. . The development of following element ha improved the reliability and the respons action of low pressure gauges :
  1.    Diaphragm
  2.    Capsule
  3.    Bourdon
  4.    Ring balance
 Discuss Question
Answer: Option B. -> Capsule
Question 30. . Which is not correct about load cells used to measure weight/force :
  1.    Accuracy of the order of 0.01 to 1%
  2.    Rugged and compact construction
  3.    No moving parts and negligible deflection under load
  4.    Low resistance to side load and low overload withstand
 Discuss Question
Answer: Option D. -> Low resistance to side load and low overload withstand

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