# Practice Test: Question Set - 32

**1. The celerity (velocity) of a pressure wave in a fluid is given by (where**

*K*= Bulk modulus, and ρ = Density of the fluid)- (A)

*K*.ρ

- (B)

*K*/ρ

- (C) ρ/

*K*

- (D) None of these

**2. A fluid having no viscosity is known as**

- (A) Real
fluid

- (B) Ideal fluid

- (C) Newtonian
fluid

- (D) Non-Newtonian
fluid

**3. In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be**

- (A)

*1/16 to 1/8*

- (B)

*1/8 to 1/4*

- (C)

*1/4 to 1/3*

- (D)

*1/3 to 1/2*

**4. Liquids transmit pressure equally in all the directions. This is according to**

- (A) Boyle's law

- (B) Archimedes principle

- (C) Pascal's law

- (D) Newton's formula

**5. The discharge over a triangular notch is**

- (A) Inversely
proportional to

*H*

^{3/2}

- (B) Directly
proportional to

*H*

^{3/2}

- (C) Inversely
proportional to

*H*

^{5/2}

- (D) Directly
proportional to

*H*

^{5/2}

**6. A flow whose streamline is represented by a straight line, is called __________ dimensional flow.**

- (A) One

- (B) Two

- (C) Three

- (D) Four

**7. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.**

- (A) Equal to

- (B) Less than

- (C) More
than

- (D) None of
these

**8. The velocity corresponding to Reynold number of 2000 is called**

- (A) Sub-sonic
velocity

- (B) Super-sonic
velocity

- (C) Lower
critical velocity

- (D) Higher
critical velocity

**9. A structure, whose width is __________ the width of the channel, is called a flumed structure.**

- (A) Less than

- (B) More than

- (C) Equal

- (D) None of
these

**10. The force of buoyancy is always __________ the weight of the liquid displaced by the body.**

- (A) Equal to

- (B) Less than

- (C) More than

- (D) None of
these

**11. The density of water is 1000 kg/m**

^{3}at- (A) 0° C

- (B) 0° K

- (C) 4° C

- (D) 20° C

**12. Bulk modulus of a fluid __________ as the pressure increases.**

- (A) Remain same

- (B) Decreases

- (C) Increases

- (D) None of
these

**13. The coefficient of viscosity may be determined by**

- (A) Capillary
tube method

- (B) Orifice type
viscometer

- (C) Rotating
cylinder method

- (D) All of these

**14. Center of pressure on an inclined plane is**

- (A) At the Centroid

- (B) Above the Centroid

- (C) Below the Centroid

- (D) At metacentre

**15. When the Mach number is less than unity, the flow is called**

- (A) Sub-sonic
flow

- (B) Sonic flow

- (C) Super-sonic
flow

- (D) Hyper-sonic
flow

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