Question: In case of an airfoil, the separation of flow occurs________________?

• 1. at the extreme rear of body
• 2. at the extreme front of body
• 3. midway between rear and front of body
• 4. any where between rear and front of body depending upon Reynolds number

Question: The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?

• 1. 0.423 D
• 2. 0.577 D
• 3. 0.223 D
• 4. 0.707 D

Question: If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?

• 1. x
• 2. x
• 3. x
• 4. x/7

Question: For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be_________________?

• 1. 300
• 2. 337.5
• 3. 600
• 4. 675

Question: The discharge over a broad crested weir is maximum when the depth of flow is_______________?

• 1. H/3
• 2. H/2
• 3. 2 H/5
• 4. 2 H/3

Question: Which of the following has highest coefficient of discharge ?

• 1. sharp edged orifice
• 2. venturimeter
• 3. Borda’s mouthpiece running full
• 4. CipoUetti weir

Question: The major loss of energy in long pipes is due to_______________?

• 1. sudden enlargement
• 2. sudden contraction
• 3. gradual contraction or enlargement
• 4. friction

Question: Coefficient of velocity for Borda’s mouth piece running full is________________?

• 1. 0.611
• 2. 0.707
• 3. 0.855
• 4. 1.00

Question: The pressure at the summit of a syphon is_______________?

• 1. equal to atmospheric
• 2. less than atmospheric
• 3. more than atmospheric
• 4. none of the above

Question: Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________?

• 1. 5%
• 2. 10%
• 3. 15%
• 4. 20%