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MCQs

Total Questions : 206 | Page 5 of 21 pages
Question 41. Centrifugal tension in belt
  1.    Reduce power transmission
  2.    Increase power transmission
  3.    Does not effect power transmission
  4.    The effect is not definite
 Discuss Question
Answer: Option A. -> Reduce power transmission


Reduce power transmission


Question 42. The unit of energy is S.I. system is
  1.    Newton
  2.    Pascal
  3.    Joule
  4.    Watt
 Discuss Question
Answer: Option C. -> Joule


Joule


Question 43. A 98N force is sufficient to pull a 100 kg block on horizontal table at a uniforce speed. If g=9.8 m/s^2, the coefficient of friction is
  1.    0.98
  2.    0.1
  3.    0.01
  4.    0.098
 Discuss Question
Answer: Option B. -> 0.1


0.1


Question 44. Two masses of 10 gm and 4 gm are moving with equal kinetic energy. The ratio of their linear momentum is
  1.    1:2
  2.    3:1
  3.    4:1
  4.    1:16
 Discuss Question
Answer: Option C. -> 4:1


4:1


Question 45. In a lifting machine, a load of 240 N is being raised and the velocity ratio is 20. If the efficiency of the machine is 40%, the effort is equal to
  1.    20N
  2.    25N
  3.    30N
  4.    35N
 Discuss Question
Answer: Option C. -> 30N


30N


Question 46. If the acceleration due to gravity is doubled at any place, the weight of the body will be
  1.    half
  2.    double
  3.    same
  4.    2g times
 Discuss Question
Answer: Option B. -> double


double


Question 47. The coefficient of Performance for a refrigerator will be
  1.    0.001
  2.    0.10
  3.    1.00
  4.    above 1.0
 Discuss Question
Answer: Option D. -> above 1.0


above 1.0


Question 48. A stone of mass 1 kg tied to a string of 1 metre long is rotated in a horizontal circle at a constant angular speed of 5 rad/sec, then the tension in the string will be
  1.    5N
  2.    10N
  3.    15N
  4.    25N
 Discuss Question
Answer: Option D. -> 25N


25N


Question 49. For the steam which is initially saturated andflowing through a nozzle, the ratio of pressures at exit and inlet for maximum discharge is equal to
  1.    0.545
  2.    0.582
  3.    0.5
  4.    0.6
 Discuss Question
Answer: Option B. -> 0.582


0.582


Question 50. A lift descends with an acceleration of 0.5 metres/sec^2 from the top floor of a multistoried building. The time required to travel a distance of 25 metres will be
  1.    5 sec
  2.    8 sec
  3.    10 sec
  4.    12 sec
 Discuss Question
Answer: Option C. -> 10 sec


10 sec


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