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MCQs

Total Questions : 2607 | Page 58 of 261 pages
Question 571. The period during which the cam follower remains at rest, when cam moves, is known as
  1.    Constant period
  2.    Fixed period
  3.    Dwell period
  4.    Idle period
 Discuss Question
Answer: Option C. -> Dwell period
Question 572. Ball bearing type screws are found in following application
  1.    Screw jack
  2.    Aeroplane engines
  3.    Crane
  4.    Steering mechanism
 Discuss Question
Answer: Option D. -> Steering mechanism
Question 573. According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)
  1.    (π/4) d² × τ × n
  2.    1.875 × (π/4) d² × τ × n
  3.    2 × (π/4) d² × τ × n
  4.    3 × (π/4) d² × τ × n
 Discuss Question
Answer: Option B. -> 1.875 × (π/4) d² × τ × n
Question 574. If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to
  1.    0.2
  2.    0.25
  3.    0.50
  4.    0.6
 Discuss Question
Answer: Option B. -> 0.25
Question 575. The product of the diametral pitch and circular pitch is equal to
  1.    1
  2.    1/π
  3.    π
  4.    π × number of teeth
 Discuss Question
Answer: Option C. -> π
Question 576. According to Rankine's theory, the failure occurs at a point in a member
  1.    When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test
  2.    When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
  3.    When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test
  4.    When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test
 Discuss Question
Answer: Option B. -> When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
Question 577. Pitch point of a cam is
  1.    A point on the pitch curve having minimum pressure angle
  2.    A point on the pitch curve having maximum pressure angle
  3.    Any point on the pitch curve
  4.    Any point on the pitch circle
 Discuss Question
Answer: Option B. -> A point on the pitch curve having maximum pressure angle
Question 578. Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by
  1.    (k₁ k₂)/ (k₁ + k₂)
  2.    (k₁ - k₂)/ (k₁ + k₂)
  3.    (k₁ + k₂)/ (k₁ k₂)
  4.    (k₁ - k₂)/ (k₁ k₂)
 Discuss Question
Answer: Option A. -> (k₁ k₂)/ (k₁ + k₂)
Question 579. For same pulley diameters, center distance, belt speed and belt and pulley materials,
  1.    Open belt drive transmits more power than crossed belt drive
  2.    Crossed belt drive transmits more power than open belt drive
  3.    Open and crossed belt drives transmit same power
  4.    Power transmission does not depend upon open and crossed types of constructions
 Discuss Question
Answer: Option B. -> Crossed belt drive transmits more power than open belt drive
Question 580. Two shafts will have equal strength, if
  1.    Diameter of both the shafts is same
  2.    Angle of twist of both the shafts is same
  3.    Material of both the shafts is same
  4.    Twisting moment of both the shafts is same
 Discuss Question
Answer: Option D. -> Twisting moment of both the shafts is same

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