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MCQs

Total Questions : 190 | Page 18 of 19 pages
Question 171. What is the value of head loss for the fully open gate and butterfly valves?
  1.    0.5 V² / 2g
  2.    V² / 2g
  3.    0.2 V² / 2g
  4.    0.04 V² / 2g
 Discuss Question
Answer: Option C. -> 0.2 V² / 2g
Answer: (c).0.2 V² / 2g
Question 172. River intakes is usually situated on ____________________
  1.    the convex side of the curve
  2.    the concave side of the curve
  3.    straight reach
  4.    the downstream side of a sewer outfall
 Discuss Question
Answer: Option C. -> straight reach
Answer: (c).straight reach
Question 173. Which of the following intake structure is widely used in small works?
  1.    Sluiceways
  2.    Simple submerged intakes
  3.    Wet intake towers
  4.    Dry intake towers
 Discuss Question
Answer: Option B. -> Simple submerged intakes
Answer: (b).Simple submerged intakes
Question 174. A trash rack is not required at the entrance of a ____________________
  1.    siphon spillway
  2.    drum gate installation
  3.    morning glory spillway
  4.    high-head gate installation
 Discuss Question
Answer: Option B. -> drum gate installation
Answer: (b).drum gate installation
Question 175. Bar screens used to cover dam outlets to prevent entry of debris or ice into the sluiceway conduits are called ______________
  1.    gate controlled ports
  2.    projecting collars
  3.    trash racks
  4.    outlets
 Discuss Question
Answer: Option C. -> trash racks
Answer: (c).trash racks
Question 176. Which of the following statement is incorrect?
  1.    Water can be withdrawn from any selected level of the reservoir using dry intake towers
  2.    Intake towers have to be designed for the worst combination of hydrostatic wind earthquake and wave forces
  3.    Dry intake towers are lighter in construction as compared to wet intake towers
  4.    In dry intake tower, the water is directly drawn into the withdrawal conduit through the gated entry ports
 Discuss Question
Answer: Option C. -> Dry intake towers are lighter in construction as compared to wet intake towers
Answer: (c).Dry intake towers are lighter in construction as compared to wet intake towers
Question 177. The head loss in the flow of water through a penstock pipe of given length ____________
  1.    increases with the increase in flow velocity
  2.    decreases with the increase in flow velocity
  3.    decreases with the increase in the roughness of the pipe surface
  4.    decreases with time
 Discuss Question
Answer: Option A. -> increases with the increase in flow velocity
Answer: (a).increases with the increase in flow velocity
Question 178. The flow through the penstocks and pressure conduits is generally ____________________
  1.    laminar
  2.    turbulent
  3.    both laminar and turbulent
  4.    unpredictable
 Discuss Question
Answer: Option B. -> turbulent
Answer: (b).turbulent
Question 179. Hoop’s reinforcement is provided in cement concrete pressure pipes in order to counteract the _________
  1.    water hammer pressure
  2.    internal hammer pressure
  3.    stresses caused by the external backfills
  4.    both water hammer pressure and internal hammer pressure
 Discuss Question
Answer: Option D. -> both water hammer pressure and internal hammer pressure
Answer: (d).both water hammer pressure and internal hammer pressure
Question 180. The more rapid the closure of the valve, greater is the water hammer pressure developed.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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