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MCQs

Total Questions : 1634 | Page 5 of 164 pages
Question 41. Which of the following is not classified as a thermo electric pyrometer?
  1.    Resistance thermometer
  2.    Thermocouple
  3.    Optical pyrometer (disappearing filament type)
  4.    Radiation pyrometer
 Discuss Question
Answer: Option C. -> Optical pyrometer (disappearing filament type)
Question 42. The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
  1.    Chromel-alumel
  2.    Iron-constantan
  3.    Platinum-platinum/rhodium
  4.    None of these
 Discuss Question
Answer: Option B. -> Iron-constantan
Question 43. __________ are analysed using a polarograph.
  1.    Isotonic solutions
  2.    Solids
  3.    Liquids
  4.    Gases
 Discuss Question
Answer: Option B. -> Solids
Question 44. __________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'.
  1.    Celcius
  2.    Rankine
  3.    Reumur
  4.    Farenhite
 Discuss Question
Answer: Option C. -> Reumur
Question 45. Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
  1.    12
  2.    36
  3.    54
  4.    68
 Discuss Question
Answer: Option B. -> 36
Question 46. Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an
  1.    Venturimeter
  2.    Orificemeter
  3.    Magnetic flow meter
  4.    Hot wire anemometer
 Discuss Question
Answer: Option C. -> Magnetic flow meter
Question 47. Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.
  1.    Radiation
  2.    Optical
  3.    Photoelectric
  4.    None of these
 Discuss Question
Answer: Option C. -> Photoelectric
Question 48. Response of a linear control system for a change in set point is called
  1.    Frequency response
  2.    Transient response
  3.    Servo problem
  4.    Regulator problem
 Discuss Question
Answer: Option C. -> Servo problem
Question 49. The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
  1.    D
  2.    D²
  3.    D³
  4.    D⁴
 Discuss Question
Answer: Option D. -> D⁴
Question 50. Compositional analysis of __________ is done using mass spectrometer.
  1.    An isotope
  2.    Natural gas
  3.    A solid
  4.    An alloy
 Discuss Question
Answer: Option A. -> An isotope

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