Time Left - 15:00 mins
GATE (CE) 2022 : Fluid Mechanics and Hydraulics Quiz #7
Attempt now to get your rank among 140 students!
Question 1
Consider a laminar flow at zero incidence over a flat plate. The shear stress at the wall is denoted by 
. The axial positions x1 and x2 on the plate are measured from the leading edge in the direction of flow. If x2>x1, then
Question 2
The viscous laminar flow of air over a flat plate results in the formation of a boundary layer. The boundary layer thickness at the end of the plate of length L is 
When the plate length is increased to twice its original length, the percentage change in laminar boundary layer thickness at the end of the plate (with respect to 
) is (correct to two decimal places).
When the plate length is increased to twice its original length, the percentage change in laminar boundary layer thickness at the end of the plate (with respect to ) is (correct to two decimal places).Question 3
A smooth flat plate with a sharp leading edge is placed along a gas stream flowing at U=10 m/s. The thickness of the boundary layer at section r-s=10 mm, the breadth of the plate is 1m (onto the paper) and the density of the gas 
. Assume that the boundary layer is thin, two dimensional, and follows a linear velocity distribution
, at the section r-s, where y is the height from plate.
The integrated drag force (in N) on the plate, between point p & s is:
. Assume that the boundary layer is thin, two dimensional, and follows a linear velocity distribution, at the section r-s, where y is the height from plate.The integrated drag force (in N) on the plate, between point p & s is:
Question 4
At a sudden expansion of a water pipeline from a diameter of 0.24 m to 0.48 m, the HGL rises by 10 mm, calculate the discharge.
Question 5
A 250 m long and 0.2 m diameter pipe inclined 15
with horizontal through which a lubricating oil (sp. gr. = 0.85, dynamic viscosity = 0.15 N-s/m2) is pumped at the rate of 0.05 m3/s in the upward direction. The pressure drop in the pipe is
with horizontal through which a lubricating oil (sp. gr. = 0.85, dynamic viscosity = 0.15 N-s/m2) is pumped at the rate of 0.05 m3/s in the upward direction. The pressure drop in the pipe is Question 6
A 0.05m diameter m horizontal pipe is connected to a reservoir and runs 8 m, then expands into 0.1m diameter abruptly and runs 45m and discharges directly into open air at a velocity of 1.5m/s. If the friction factor for both the pipes is 0.026, the head in the reservoir necessary to maintain this flow is_________m
- 140 attempts
- 1 upvote
- 0 comments
Aug 9ESE & GATE CE
