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MCQs

Total Questions : 1628 | Page 20 of 163 pages
Question 191. The force due to wind load acting on a tall vessel depends upon its
  1.    Shape
  2.    Outside diameter
  3.    Height
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 192. Maximum acceptable total liquid gradient over a tray is about __________ mm.
  1.    5.5
  2.    12.5
  3.    30.5
  4.    45.5
 Discuss Question
Answer: Option B. -> 12.5
Question 193. Scale up problem in design based on the similarity concept takes into account __________ similarity.
  1.    Geometrical
  2.    Kinematic
  3.    Dynamic
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 194. The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.
  1.    5 to 10
  2.    15 to 30
  3.    40 to 50
  4.    55 to 75
 Discuss Question
Answer: Option B. -> 15 to 30
Question 195. The buckling tendency of compression members is always in the direction of the
  1.    Least radius of gyration
  2.    Axis of the load
  3.    Perpendicular to the axis of the load
  4.    None of these
 Discuss Question
Answer: Option A. -> Least radius of gyration
Question 196. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)
  1.    E
  2.    Σ
  3.    Σ/E
  4.    E/σ
 Discuss Question
Answer: Option C. -> Σ/E
Question 197. In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)
  1.    Aa = Sa
  2.    1.2 Aa = 1.2 Sa
  3.    Sa = 1.5 Aa
  4.    Aa = 1.5 Sa
 Discuss Question
Answer: Option A. -> Aa = Sa
Question 198. In the design of a shell and tube heat exchanger, the corrosion allowance
  1.    Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc
  2.    For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm
  3.    For internal cover and tube sheet is provided on both the sides
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 199. Cylindrical storage tanks used for the storage of volatile liquids (e.g., naphtha) have __________ roofs.
  1.    Conical
  2.    Flat
  3.    Floating
  4.    Fixed
 Discuss Question
Answer: Option C. -> Floating
Question 200. In a vertical short tube evaporator (Calendria type), the
  1.    Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylinderical drum dia of 1-6 metres are normally used
  2.    Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube
  3.    Liquor is inside the tube while the steam is outside the tube
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above

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