## Objective Questions on Fluids

Objective Questions on Fluids, Fluids MCQ, Multiple Choice Questions on Fluids, GATE Questions on Fluids, Engineering MCQ, BME MCQ, Basic Mechanical Objectives, Objective Questions on Fluids

Objective Questions on Fluids in BME Part-1

### Multiple Choice Questions

Q.1. An ideal fluid is defined as the fluid which

- is compressible
- is incompressible
- is incompressible and non-viscous
- has negligible surface tension

**Answer: **is incompressible and non-viscous

Q.2. Newton’s law of viscosity states that

- shear stress is directly proportional to the velocity
- shear stress is directly proportional to velocity gradient
- shear stress is directly proportional to shear strain
- shear stress is directly proportional to the viscosity

**Answer: **shear stress is directly proportional to velocity gradient

Q.3. A Newtonian fluid is defined as the fluid which

- is incompressible and non-viscous,
- obeys Newton’s law of viscosity
- is highly viscous
- is compressible and non-viscous

**Answer: **obeys Newton’s law of viscosity

Q.4. Kinematic viscosity is equal to

- dynamic viscosity x density
- dynamic viscosity/density
- dynamic viscosity x pressure
- pressure x density

**Answer: **dynamic viscosity/density

Q.5. Poise is the unit of

- mass density
- kinematic viscosity
- viscosity
- velocity gradient

**Answer: **viscosity

Q.6. Stoke is the unit of

- surface tension
- viscosity
- kinematic viscosity
- none of the above

**Answer: **kinematic viscosity

Q.7. Pascal’s law states that pressure at a point is equal in all directions

- in a liquid at rest
- in a fluid at rest
- in a laminar flow
- in a turbulent flow

**Answer: **in a fluid at rest

Q.8. The hydrostatic law states that rate of increase of pressure in a vertical direction is equal to

- density of the fluid
- specific weight of the fluid
- weight of the fluid
- none of the above

**Answer: **specific weight of the fluid

Q.9. Fluid statics deals with

- viscous and pressure forces
- viscous and gravity forces
- gravity and pressure forces
- compressibility and gravity forces

**Answer: **gravity and pressure forces

Q.10. Gauge pressure at a point is equal to

- absolute pressure plus atmospheric pressure
- absolute pressure minus atmospheric pressure
- vacuum pressure plus absolute pressure
- none of the above

**Answer: **absolute pressure minus atmospheric pressure

Q.11. Atmospheric pressure held in terms of water column is

- 7.5 m
- 8.5 m
- 9.81 m
- 10.30 m

**Answer: **10.30 m

Q.12. Continuity equation deals with the law of conservation of

- mass
- momentum
- energy
- none of the above

**Answer: **mass

Q.13. Continuity equation can take the form

- A_{1}V_{1}=A_{2}V_{2}
- \rho _{1}A_{1}=\rho _{2}A_{2}
- \rho _{1}A_{1}V_{1}=\rho _{2}A_{2}V_{2}
- none of the above

**Answer: **A_{1}V_{1}=A_{2}V_{2}

Q.14. Bernoulli’s theorem deals with the law of conservation of

- mass
- momentum
- energy
- none of the above

**Answer: **energy

Q.15. If the density of a fluid is constant from point to point in a flow region, it is called

- steady flow
- incompressible flow
- uniform flow
- rotational flow

**Answer: **incompressible flow

Q.16. If the density of a fluid changes from point to point in a flow region, it is called

- steady flow
- unsteady flow
- non-uniform flow
- compressible flow

**Answer: **compressible flow

Q.17. Study of fluid motion with the forces causing the flow is known as

- kinematics of fluid flow
- dynamics of fluid flow
- statics of fluid flow
- none of the above

**Answer: **none of the above

Q.18. Study of fluid motion without considering the forces, causing the flow is known as

- kinematics of fluid flow
- dynamics of fluid flow
- statics of fluid flow
- none of the above

**Answer: **kinematics of fluid flow

Q.19. Study of fluid at rest is known as fluid

- kinematics
- dynamics
- statics
- none of above

**Answer: **statics

Q.20. The term \frac{V^{2}}{2g} is known as

- kinetic energy
- pressure head
- velocity head
- None of above

**Answer: **velocity head

Q.21. Hydraulic efficiency of a turbine is defined as the ratio of

- Power available at the inlet of turbine to power given by water to the rotor
- Power at the shaft of the turbine to power given by water to the runner
- Power at the shaft of the turbine to the power at the inlet of turbine
- None of the above

**Answer: **None of the above

Q.22. A turbine is called impulse if at the inlet of the turbine

- total energy is only kinetic energy
- total energy is only pressure energy
- total energy is the sum of kinetic energy and pressure energy
- None of the above

**Answer: **total energy is only kinetic energy

Q.23. Francis turbine is

- an impulse turbine
- a radial flow impulse turbine
- an axial flow turbine
- a radial flow reaction turbine

**Answer: **a radial flow reaction turbine