BARC CE 2018 "Fluid Mechanics & Hydraulics" Nuclear Quiz 1

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Question 1

The following statements are related to a laminar flow occurring in a circular conduit. Which one of the following statement is INCORRECT?

• AThe flow is rotational
• BOther quantities remaining same, increase in diameter increases the Reynolds number
• CLoss of head is proportional to first power of viscosity
• DLoss of head is proportional to the square velocity

Question 2

In a horizontal rectangular channel, a hydraulic jump with a sequent depth ratio of 5.0 is formed. This jump can be classified as

• AWeak jump
• BOscillating jump
• CStrong jump
• DSteady jump

Question 3

For a steady incompressible laminar flow between two infinite parallel stationary plates, the shear stress variation is

• Alinear with zero value at the plates
• Blinear with zero value at the center
• Cquadratic with zero value at the Plates
• Dquadratic with zero value at the centre

Question 4

Group I contains the types of fluids while Group II contains the shear stress - rate of shear relationship of different types of fluids, as shown in the figure.
Group I
P. Newtonian fluid
Q. Pseudo plastic fluid
R. Plastic fluid
S. Dilatant fluid
Group II
1) Curve 1
2) Curve 2
3) Curve 3
4) Curve 4
5) Curve 5

The correct match between Group I and Group II is

• AP-2, Q-4, R-1, S-5
• BP-2, Q-5, R-4, S-1
• CP-2, Q-4, R-5, S-3
• DP-2, Q-1, R-3, S-4

Question 5

When Mach number is less than unity, the flow is called

• Asub-sonic flow
• Bsonic flow
• Csupersonic flow
• Dhypersonic flow

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