MCQs

Total Questions : 2607 | Page 45 of 261 pages
Question 441. The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)
  1.    1420 d
  2.    1680 d
  3.    2080 d
  4.    2840 d
 Discuss Question
Answer: Option D. -> 2840 d
Question 442. According to Indian standards, total numbers of tolerance grades are
  1.    8
  2.    12
  3.    18
  4.    20
 Discuss Question
Answer: Option C. -> 18
Question 443. In order to avoid tearing of the plate at an edge, the distance from the centre line of the rivet hole to the nearest edge of the plate should be equal to (where d = Diameter of rivet hole)
  1.    1 d
  2.    1.5 d
  3.    2.5 d
  4.    2 d
 Discuss Question
Answer: Option B. -> 1.5 d
Question 444. The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is
  1.    1/2
  2.    1
  3.    2
  4.    4
 Discuss Question
Answer: Option C. -> 2
Question 445. 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
Question 446. The value of Lewis form factor used in design of gears is
  1.    Dependent on number of teeth of a gear
  2.    Dependent on system of teeth
  3.    Independent of size of teeth
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 447. The design of the pressure vessel is based on
  1.    Longitudinal stress
  2.    Hoop stress
  3.    Longitudinal and hoop stress
  4.    None of these
 Discuss Question
Answer: Option B. -> Hoop stress
Question 448. For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.
  1.    Less than unity
  2.    Greater than unity
  3.    Equal to 1
  4.    None of these
 Discuss Question
Answer: Option A. -> Less than unity
Question 449. The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called
  1.    Repeated stress
  2.    Yield stress
  3.    Fluctuating stress
  4.    Alternating stress
 Discuss Question
Answer: Option C. -> Fluctuating stress
Question 450. If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as
  1.    T sec³φ
  2.    T sec²φ
  3.    T/sec³φ
  4.    T cosecφ
 Discuss Question
Answer: Option A. -> T sec³φ

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