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MCQs

Total Questions : 5013 | Page 5 of 502 pages
Question 41. A boy weighing 110lb climbs up a 50 ft high vertical destination in 100 seconds. Horse power of the boy is __________ hp.
  1.    0.1
  2.    0.5
  3.    0.8
  4.    1
 Discuss Question
Answer: Option A. -> 0.1
Question 42. Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.
  1.    10
  2.    20
  3.    30
  4.    40
 Discuss Question
Answer: Option D. -> 40
Question 43. The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 x 10⁻¹6⁶ m² . S⁻¹ and it is 1.94 x 10⁻¹⁴ m² S⁻¹ at 1200 K. The activation energy (in k. J.mole⁻¹ ) for the diffusion of Ni in Cu is
  1.    130
  2.    180
  3.    230
  4.    250
 Discuss Question
Answer: Option C. -> 230
Question 44. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same
  1.    Period increases
  2.    Period decreases
  3.    Group increases
  4.    Both 'b' & 'c'
 Discuss Question
Answer: Option D. -> Both 'b' & 'c'
Question 45. Hoope's cell is predominantly used for the electrolytic refining of
  1.    Zinc
  2.    Copper
  3.    Aluminium
  4.    Tin
 Discuss Question
Answer: Option C. -> Aluminium
Question 46. 'Sterilised zone' around a hazardous chemical industry is an area with __________ km radius around it, in which the total population/inhabitants should be less than 20000 preferably in the upwind direction.
  1.    0.5
  2.    5
  3.    25
  4.    50
 Discuss Question
Answer: Option B. -> 5
Question 47. Internal cracks in drawn bars are due to
  1.    Secondary tensile stresses
  2.    Temperature gradient in the work piece
  3.    Heated dies and grips
  4.    Internal compressive residual stress
 Discuss Question
Answer: Option A. -> Secondary tensile stresses
Question 48. Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.
  1.    20
  2.    80
  3.    120
  4.    500
 Discuss Question
Answer: Option C. -> 120
Question 49. RADAR is
  1.    Acronym for Radio Detection and Ranging
  2.    Name of technique for locating distant objects
  3.    Name of instrument for locating distant objects
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 50. All modes of heat transfer i.e., conduction, convection & radiation occur in case of the
  1.    Condensation of steam in a partial condenser
  2.    Boiler furnace
  3.    Insulated pipe car raying high pressure steam
  4.    None of these
 Discuss Question
Answer: Option B. -> Boiler furnace

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