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MCQs

Total Questions : 5013 | Page 7 of 502 pages
Question 61. Thermistors are used in __________ devices.
  1.    Voltage measuring
  2.    Temperature measuring
  3.    Temperature compensating
  4.    Both B & C
 Discuss Question
Answer: Option D. -> Both B & C
Question 62. More than 1000 tons refrigeration capacity plants are usually of __________ type.
  1.    Vapour compression
  2.    Vapour absorption
  3.    Air refrigeration
  4.    None of these
 Discuss Question
Answer: Option B. -> Vapour absorption
Question 63. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
  1.    Wetness
  2.    Mass flow rate
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 64. Addition of __________ in steel can help in increasing the depth of hardness.
  1.    Nickel
  2.    Chromium
  3.    Vanadium
  4.    Tungsten
 Discuss Question
Answer: Option C. -> Vanadium
Question 65. A solar cell converts the sunlight directly into __________ energy.
  1.    Thermal
  2.    Electrical
  3.    Mechanical
  4.    Chemical
 Discuss Question
Answer: Option B. -> Electrical
Question 66. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.
  1.    Scratch
  2.    Indentation
  3.    Dynamic
  4.    Rebound
 Discuss Question
Answer: Option A. -> Scratch
Question 67. In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of
  1.    Water hammer
  2.    Cavitation
  3.    Flow separation
  4.    Turbulent mixing
 Discuss Question
Answer: Option B. -> Cavitation
Question 68. Pressure gauges are never connected directly to the live steam line; rather a loop or syphon is interposed as close as possible to the pressure gauge. This is done to
  1.    Avoid the overheating of the tubes & bellows which operate them to minimise error and damage
  2.    Form a seal of water by steam condensate to fill the tube or bellows at the pressure being measured
  3.    Both 'a' & 'b'
  4.    Avoid the static head error introduced by steam entry
 Discuss Question
Answer: Option C. -> Both 'a' & 'b'
Question 69. Which of the following materials has the poorest electrical conductivity?
  1.    Carbon
  2.    Aluminium
  3.    Silver
  4.    Stainless steel
 Discuss Question
Answer: Option A. -> Carbon
Question 70. Material having maximum density is
  1.    Plutonium
  2.    Osmium
  3.    Titanium
  4.    Uranium
 Discuss Question
Answer: Option B. -> Osmium

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