# Practice Test: Question Set - 14

**1. The specific weight of sea water is __________ that of pure water.**

- (A) Same as

- (B) Less than

- (C) More
than

- (D) None of
these

**2. Which of the following instruments is used to measure flow on the application of Bernoulli's theorem?**

- (A) Venturimeter

- (B) Orifice plate

- (C) Nozzle

- (D) All of the above

**3. When a cylindrical vessel of radius (**

*r*) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is- (A)

*ω.r/*2

*g*

- (B)

*ω².r²/*2

*g*

- (C)

*ω.r/*4

*g*

- (D)

*ω².r²/*4

*g*

**4. The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is**

- (A) 2.4 m

- (B) 3.0 m

- (C) 4.0 m

- (D) 5.0 m

**5. An internal mouthpiece is said to be running free if the length of the mouthpiece is __________ the diameter of the orifice.**

- (A) Less than
twice

- (B) More than
twice

- (C) Less than
three times

- (D) More
than three times

**6. An ideal flow of any fluid must satisfy**

- (A) Pascal law

- (B) Newton's law of
viscosity

- (C) Boundary layer theory

- (D) Continuity equation

**7. The height of a water column equivalent to a pressure of 0.15 MPa is**

- (A) 15.3 m

- (B) 25.3 m

- (C) 35.3
m

- (D) 45.3 m

**8. The region between the separation streamline and the boundary surface of the solid body is known as**

- (A) Wake

- (B) Drag

- (C) Lift

- (D) Boundary layer

**9. The total pressure on the top of a closed cylindrical vessel of radius (**

*r*) completely filled up with liquid of specific weight (*w*) and rotating at (ω) rad/s about its vertical axis, is- (A)

*π w ω² r²/4g*

- (B)

*π w ω² r³/4g*

- (C)

*π w ω² r⁴/4g*

- (D)

*π w ω² r²/2g*

**10. Froude number is significant in**

- (A) Supersonics, as with projectile and jet
propulsion

- (B) Full immersion or
completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

- (C) Simultaneous motion through two fluids
where there is a surface of discontinuity, gravity forces, and wave making
effect, as with ship's hulls

- (D) All of the above

**11. The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called**

- (A) Density
of liquid

- (B) Specific
gravity of liquid

- (C) Compressibility
of liquid

- (D) Surface
tension of liquid

**12. A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to**

- (A) 10 kg

- (B) 100 kg

- (C) 1000 kg

- (D) 1 kg

**13. The total head of a liquid particle in motion is equal to**

- (A) Pressure
head + kinetic head + potential head

- (B) Pressure
head - (kinetic head + potential head)

- (C) Potential
head - (pressure head + kinetic head)

- (D) Kinetic head
- (pressure head + potential head)

**14. The bulk modulus of elasticity with increase in pressure**

- (A) Increases

- (B) Decreases

- (C) Remain constant

- (D) Increases first up to certain limit and
then decreases

**15. The diameter of the nozzle (**

*d*) for maximum transmission of power is given by (where*D*= Diameter of pipe,*f*= Darcy’s coefficient of friction for pipe, and*l*= Length of pipe)- (A)

*d = (D⁵/8fl)*

^{1/2}- (B)

*d = (D⁵/8fl)*

^{1/3}- (C)

*d = (D⁵/8fl)*

^{1/4}- (D)

*d = (D⁵/8fl)*

^{1/5}**View All Answers**

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