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GATE CE 2020: Fluid Mechanics Quiz 7
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Question 1
A smooth flat rectangular plate is placed edgewisw in a stream of fluid. At what fraction of the length from the leading edge would the drag force on the front portion be equal to half of the total drag force ? (Assume the boundary layer to be laminar).
Question 2
An aircraft is flying in level flight at a speed of 200 km/hr through air (density (ρ)= 1.2 kg/m2, and viscosity (μ) = 1.6 × 10–5 N–s/m2). The lift co–efficient at this speed is 0.4 and the drag co–efficient is 0.0065. The mass of the aircraft is 800 kg. The effective lift area of the aircraft is
Question 3
Match List-I (Principle) with List-II (Effect) and select the correct answer using the codes given below the lists:
Question 4
A circular pipe of radius R carries a laminar flow of a fluid. The average velocity is indicated as the local velocity at what radial distance, measured from the centre?
Question 5
Water flows through a 100 mm diameter pipe with a velocity of 0.015 m/sec. If the kinematic viscosity of water is 1.13 × 10–6 m2/sec, the friction factor of the pipe material is
Question 6
In a laminar boundary layer, the velocity distribution can be assumed to be given, in usual notations, as
Which one of the following is the correct expression for the displacement thickness
for this boundary layer?
Which one of the following is the correct expression for the displacement thickness
for this boundary layer? - 656 attempts
- 12 upvotes
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Nov 10ESE & GATE CE
