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MCQs

Total Questions : 2607 | Page 77 of 261 pages
Question 761. The material generally used for air-craft components is
  1.    mild steel
  2.    high speed steel
  3.    stainless steel
  4.    aluminium
 Discuss Question
Answer: Option D. -> aluminium
Answer: (d).aluminium
Question 762. In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)
  1.    T₁/T₂ = μθ × n
  2.    T₁/T₂ = (μθ)n
  3.    T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n
  4.    T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n
 Discuss Question
Answer: Option D. -> T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n
Answer: (d).T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n
Question 763. The most important dimension in the design of a nut is
  1.    pitch diameter
  2.    inside diameter
  3.    outside diameter
  4.    height
 Discuss Question
Answer: Option D. -> height
Answer: (d).height
Question 764. When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.
  1.    rectangular
  2.    square
  3.    parallel
  4.    None of these
 Discuss Question
Answer: Option C. -> parallel
Answer: (c).parallel
Question 765. Factor of safety for fatigue loading is the ratio of
  1.    elastic limit to the working stress
  2.    elastic limit to the yield point
  3.    endurance limit to the working stress
  4.    Young's modulus to the ultimate tensile strength
 Discuss Question
Answer: Option C. -> endurance limit to the working stress
Answer: (c).endurance limit to the working stress
Question 766. In a flange coupling, the bolts are subjected to
  1.    tensile stress
  2.    compressive stress
  3.    shear stress
  4.    none of these
 Discuss Question
Answer: Option C. -> shear stress
Answer: (c).shear stress
Question 767. The shafts of larger diameter are usually forged and turned to size in a lathe.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 768. The bending moment M and a torque T is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then M is equal to
  1.    T/2
  2.    T
  3.    2 T
  4.    4 T
 Discuss Question
Answer: Option A. -> T/2
Answer: (a).T/2
Question 769. When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is
  1.    tensile stress
  2.    compressive stress
  3.    shear stress
  4.    bending stress
 Discuss Question
Answer: Option C. -> shear stress
Answer: (c).shear stress
Question 770. The algebraic difference between the maximum limit and the basic size is called
  1.    lower deviation
  2.    upper deviation
  3.    actual deviation
  4.    mean deviation
 Discuss Question
Answer: Option B. -> upper deviation
Answer: (b).upper deviation

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