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MCQs

Total Questions : 1634 | Page 6 of 164 pages
Question 51. The inverse Laplace transform of the function f(s) = 1/S(1 + S) is
  1.    1 + et
  2.    1 - et
  3.    1 + e-t
  4.    1 - e-t
 Discuss Question
Answer: Option D. -> 1 - e-t
Question 52. Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
  1.    0.0001
  2.    0.001
  3.    0.01
  4.    0.1
 Discuss Question
Answer: Option B. -> 0.001
Question 53. Measurement of pressure in ammonia reactor is done by
  1.    Bourdon gauge
  2.    U-tube manometer
  3.    Inclined tube manometer
  4.    Pirani guage
 Discuss Question
Answer: Option A. -> Bourdon gauge
Question 54. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
  1.    Increases
  2.    Decreases
  3.    Remains constant
  4.    Increases exponentially
 Discuss Question
Answer: Option B. -> Decreases
Question 55. Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
  1.    Filling nitrogen under pressure in the stem
  2.    Increasing the diameter of the tube
  3.    Using steel tube in place of glass tube
  4.    Accounting for the tube expansion
 Discuss Question
Answer: Option A. -> Filling nitrogen under pressure in the stem
Question 56. An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall. This is the working principle of a
  1.    PH meter
  2.    Polarimeter
  3.    Chromatograph
  4.    Polarograph
 Discuss Question
Answer: Option A. -> PH meter
Question 57. The open loop transfer function of a control system is KR/(1 + TS) . This represents
  1.    A first order system
  2.    Dead time system
  3.    A first order time lag
  4.    A second order system
 Discuss Question
Answer: Option A. -> A first order system
Question 58. A negative gain margin expressed in decibels means a/an __________ system.
  1.    Stable
  2.    Unstable
  3.    Critically damped
  4.    None of these
 Discuss Question
Answer: Option B. -> Unstable
Question 59. Strain gage pressure transducers are used to measure __________ pressures.
  1.    Gage as well as vacuum
  2.    Absolute as well as differential
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 60. Pressure of 0.0001 absolute psi can be measured by __________ gauge.
  1.    Mcloid
  2.    Pirani
  3.    Thermocouple
  4.    None of these
 Discuss Question
Answer: Option A. -> Mcloid

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