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MCQs

Total Questions : 117 | Page 9 of 12 pages
Question 81. The constituent of producer gas which occupies the highest percentage by volume and helps in increasing its overall calorific value is
  1.    CO
  2.    CO2
  3.    H2
  4.    CH4
 Discuss Question
Answer: Option A. -> CO


-NA-


Question 82. Approximate percentage of scores that fall within ±Ïƒ (standard deviation) of the mean in a normal distribution is
  1.    34
  2.    68
  3.    95
  4.    99
 Discuss Question
Answer: Option B. -> 68


-NA-


Question 83. The integrating factor of the differential equation (x + 1)dy/dx - y = sin x is
  1.    x
  2.    (x + 1)
  3.    1/x
  4.    1/(x + 1)
 Discuss Question
Answer: Option D. -> 1/(x + 1)


-NA-


Question 84. During field operation, the shank of a tractor drawn rigid tyne sweep type cultivator is mainly subjected to
  1.    bending
  2.    shear
  3.    torsion
  4.    bending and torsion
 Discuss Question
Answer: Option A. -> bending


-NA-


Question 85. A pair of parallel glass panes, each of 3 mm thickness traps 2 mm layer of stagnant air. Thermal conductivities of glass and air are 0.5 and 0.02 W m-1 K-1, respectively. If the film heat transfer coefficient of air is 10 W m-2 K-2, then Biot Number is
  1.    1.50
  2.    1.00
  3.    0.06
  4.    0.04
 Discuss Question
Answer: Option C. -> 0.06


-NA-


Question 86. Tomato catsup with 10 Pa sn Paconsistency coefficient and 0.8 flow behaviour index is flowing in a pipe. Generalized coefficient of viscosity of catsup, in Pa sn is
  1.    2.66
  2.    6.93
  3.    15.91
  4.    23.87
 Discuss Question
Answer: Option B. -> 6.93


-NA-


Question 87. Two small parallel plane square surfaces, each measuring 4 mm × 4 mm are placed 0.5 m apart (centre to centre) with 30° angle between the radial distance and both the surface normals. The view factor between the two surfaces is
  1.    1.53 * 10-5
  2.    1.76 * 10-5
  3.    3.82 * 10-3
  4.    4.41 * 10-3
 Discuss Question
Answer: Option A. -> 1.53 * 10-5


-NA-


Question 88. A single acting reciprocating pump discharges 3.5 litres of water per second at 40 rpm. The pump has a piston diameter of 150 mm and a stroke of 300 mm. The percentage slip is
  1.    0.85
  2.    1.97
  3.    3.53
  4.    6.05
 Discuss Question
Answer: Option A. -> 0.85


-NA-


Question 89. A packed bed of 480 kg solid particles having particle size of 0.15 mm and density of 800 kg m-3 is fluidized using air at 250C and 1 atmospheric pressure. If the cross section of the empty bed is 0.45 m2 and voidage at minimum fluidizing condition is 0.5, then the minimum height of the fluidized bed, in m is
  1.    7.4
  2.    5.4
  3.    2.7
  4.    1.0
 Discuss Question
Answer: Option C. -> 2.7


-NA-


Question 90. A tall silo having height to diameter ratio of 2 is holding 480 tons wheat of bulk density 960 kg m-3. The angle of internal friction for wheat is 250 and for wheat and wall surface is 240. Applying Airy formula, the maximum lateral pressure in kPa at the bottom of the bin section is
  1.    40.24
  2.    41.79
  3.    42.83
  4.    42.92
 Discuss Question
Answer: Option B. -> 41.79


-NA-


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