Q1:

For a Newtonian fluid:

Q2:

Existence of velocity potential implies that:

Q3:

Fluid statics deals with:

Q4:

The drag force exerted by a fluid on a body immersed in the fluid is due to:

Q5:

A triangular notch is more accurate measuring device than the rectangular notch for measuring which one of the following?

Q6:

When can a piezometer be not used for pressure measurement in pipes?

Q7:

Which one of the following statements is correct?

The pressure centre is:

Q8:

Which one of the following sets of conditions clearly apply to an ideal fluid?

Q9:

Resultant pressure of the liquid in case of an immersed body acts through which one of the following?

Q10:

What is the vertical distance of the centre of pressure below the centre of the plane area?

Q11:

Give the expression for the average velocity.

Q12:

Which one of the following is the condition for stable equilibrium for a floating body?

Q13:

The metacentric height of a passenger ship is kept lower than that of a naval or a cargo ship because:

Q14:

In the case of a centrifugal pump, cavitation will occur if:

Q15:

Air vessel is used in a reciprocating pump to obtain

Q16:

If the surface tension of water-air interface is 0.073 N/m, the gauge pressure inside a rain drop of 1 mm diameter will be:

Q17:

Match List-I (Type of fluid) with List-II (variation of shear stress) and select the correct answer:

List-I	List-II
A. Ideal fluid	1. Shear stress varies linearly with the rate of strain
B. Newtonian fluid	2. Shear stress does not vary linearly with the rate of strain
C. Non-Newtonian fluid	3. Fluid behaves like a solid until a minimum yield stress beyond which it exhibits a linear relationship between shear stress and the rate of strain
D. Bingham plastic	4. Shear stress is zero

 

Q18:

A circular plate 1.5 m diameter is submerged in water with its greatest and least depths below the surface being 2 m and 0.75 m respectively. What is the total pressure (approximately) on one face of the plate?

Q19:

Match List-I with List-II regarding a body partly submerged in a liquid and select answer using the codes given below:

List-I	List-II
A. Centre of pressure	1. Points of application of the weight of displace liquid
B. Centre of gravity	2. Point about which the body starts oscillating when titled by a small angle
C. Centre of buoyance	3. Point of application of hydrostatic pressure force
D. Matacentre	4. Point of application of the weight of the body

 

Q20:

The least radius of gyration of a ship is 9 m and the metacentric height is 750 mm. The time period of oscillation of the ship is:

Q21:

Match List-I with List-II and select the correct answer:

List-I	List-II
A. Stokes’ law	1. Strouhal number
B. Bluff body	2. Crreeping motion
C. Streamline body	3. Pressure drag
D. Karman Vortex Street	4. Skin friction drag

 

Q22:

A steady, incompressible flow is given by u = 2x² + y² and v = - 4xy. What is the convective acceleration along x-direction at point (1, 2)?

Q23:

The reading of differential manometer of a venturimeter placed at 45^o to the horizontal is 11 cm. If the venturimeter is turned to horizontal position then the manometer reading will be:

Q24:

A 600 mm diameter orifice is discharging water under a head of 9 m. Calculate the actual discharge in l/s. If C_d = 0.6 and C_V = 0.9.

Q25:

A hydraulic turbine develops a power of 10⁴ metric horse power while running at speed of 100 revolutions per minute, under a head of 40m. Its specific speed is nearest to one of the following:

Q26:

If the pump Head is 75m, discharge is 0.464m³/sec and the speed is 1440 rpm at rated condition, find the specific speed of the pump.

Q27:

A horizontal water jet a velocity of 10m/sec and cross-sectional area of 10mm² strikes a flat plate held normal to the flow direction. The density of water is 1000kg/m³. Find the total force on the plate due to the jet?

Q28:

At a rated capacity of 44 m³/s, a centrifugal pump developers 36m of head when operating at 1450 rpm. Find its specific speed.

 

Q29:

What should be the ratio of blade speed to jet speed for the maximum efficiency of a Pelton wheel?

Q30:

A liquid flow through pipes 1 and 2 with the same velocity. If the ratio of the pipe diameter d₁:d₂ be 3:2. What will be the ratio of head loss in the two pipes?

Q31:

The body moving through still water at 6 m/sec produce a water velocity of 4 m/s at a point 1m ahead. The difference in between the nose and the point 1 m ahead would be

Q32:

Water (${\gamma }_w=9.879$KN/m³) flows with a flow rate of 0.3 m³/s through a pipe AB of 10 m length and of uniform cross-section. The end B is above end A and the pipe makes an angle of 30^o to the horizontal for a pressure of 12 kN/m² at the end B, the corresponding pressure at the end A is

Q33:

A venturimeter having a diameter of 7.5 cm at the throat and 15 cm at the enlarged end, is installed in a horizontal pipeline of 15 cm diameter. The pipe carries an incompressible fluid at the rate of 30 lt/s. The difference of pressure head measured in term of moving fluid in between the enlarged and the throat of the venturimeter is observed to be 2.45 m. Taking the acceleration due to gravity as 9.81 m/s² then find the coefficient of discharge of the venturimeter.

Q34:

A square plate of size 1m x1m and weighing 350N slide down an inclined plane with a uniform velocity 1.5m/sec. the inclined plane is laid on a slope of 5 vertical to 12 horizontal and has an oil film of 1mm thickness. Calculate the dynamic viscosity of oil.

                                                                                          

[Hint, A= 1x1=1m², W=35ON, $u$=1.5m/sec $\tan \theta =\frac{5}{2}=\frac{BC}{AB}$]

Q35:

A plate with surface area of 0.4m² and weight of 500N slides down on an inclined plane at 30^o to the horizontal at a constant speed of 4m/sec. If the inclined pane is lubricated with an oil of dynamic viscosity 2 poise, find the thickness of lubricant film.

Q36:

A horizontal nozzle of 30mm diameter discharges a steady jet of water into the atmosphere at a rate of 15 liters per second. The diameter of inlet to the nozzle is 100mm.

The jet impinges normal to a flat stationary plate held close to the nozzle and neglecting air friction and considering the density of water as 1000kg/m³. Find the force exerted by the jet (in N) on the plate.

Q37:

Water is to be lifted by a net head of 150m. Identical pumps each with specific speed of 30 and rotational speed of 1450 rpm with design discharge of 0.2m³/sec are available. Find the minimum number of pumps is required?

Q38:

A compared piping system consists of 1800m of 50cm, 1200m of 40c.m and 600m of 30c.m diameter pipes of the same material. Connected in series calculate the equivalent length of 40cm pipe of same material.

Q39:

Lubricating Oil of specific gravity 0.84 and dynamic viscosity 0.140KN-Sm² is pumped at a rate of 0.026m³/s through a 0.17m diameter and 300m long horizontal pipe. Calculate the pressure drop.

Q40:

For discharge 'Q', the specific speed of a pump is 'Ns'. For half discharge with the same head the specific speed will be: