# Objective Questions on Fluids in BME Part-1 Posted by

## Objective Questions on Fluids in BME

Objective Questions on Fluids in BME, 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

### Multiple Choice Questions

Q.1. The specific volume of a fluid is the reciprocal of

• Density
• Relative density
• Specific weight
• Specific gravity

Q.2. Viscosity has the following dimensions

• MLT-2
• ML-1T-2
• ML-2T-2
• ML-1T-1

Q.3. Kinematic viscosity has the dimensions

• L2T-2
• L2T-1
• ML2T-2
• MLT-1

Q.4. Dynamic viscosity has the units

• kg/(msec)
• Ns/m3
• kg.m/sec
• Nm/sec

Q.5. One S.I. unit of viscosity is equal to

• 10 poises
• 981 poises
• 9.81 Ns/m2
• 10 kg.seclm2

Q.6. The pressure at a point in a static liquid depends on the

• depth of container
• depth of point below free surface
• depth of point below the free surface and specific weight of liquid
• depth of container and specific weight of liquid

Answer: depth of point below the free surface and specific weight of liquid

Q.7. All the terms of Bernoulli’s equation: P/ω + V2/2g + C have the units of

• Work per unit acceleration
• Work per unit weight
• Energy per unit mass
• Force per unit mass

Q.8. Bernoulli’s equation is applicable to the following type of fluid flow

• Uniform, frictionless, along a stream line
• Steady, incompressible, along a stream line

Q.9. Bernoulli’s equation for steady frictionless flow states that

• discharge is constant along a stream line
• energy is constant along a stream line but is different on another stream line
• energy is constant throughout the field of flow
• velocity is not constant along a stream line

Answer: energy is constant throughout the field of flow

Q.10. The maximum efficiency of fluid coupling is

• more than 95%
• 80% to 90%
• less than 80%

Q.11. The speeds of driving and driven shafts in a fluid coupling are 1200 r.p.m. and 1170 r.p.m. respectively. The efficiency of the coupling is

• 30%
• 70%
• 97.5%
• 99%

Q.12. If a hydro plant operate under a head of 100 m, it may be classified as

• a very high speed plant

Q.13. Run-of-river plants are usually

Q.14. In a fluid flow, point A is at a higher elevation than point B and the head loss between these points is HL. The total head at A and B are HA and HB respectively. The flow will take place

• From B to A if HA+HL=HB
• From A to B if HA+ HL=HB
• From B to A if HB + HL= HA
• Always from A to B

Answer: From B to A if HA+HL=HB

Q.15. At room temperature, the dynamic and kinematic viscosity of water

• are both greater than that of air
• are both less than that of air
• are respectively greater than and less than that of air
• are respectively less than and greater than that of air

Answer: are respectively greater than and less than that of air

Q.16. Reciprocating pumps are not common in industrial applications as they are (as compared to centrifugal pumps):

• lower discharge
• lower speed of operation
• high initial and maintenance cost
• necessity of air vessel

Answer: high initial and maintenance cost

Q.17. Pump is a mechanical device to increase the

• pressure energy of a fluid
• discharge of fluid
• velocity of fluid

Answer: pressure energy of a fluid

Q.18. Which of the statement is incorrect: Conventional sources of power generation are

• thermal power
• Hydro power
• Solar power
• Nuclear power

Q.19. Baseload demands are met by

• Thermal power
• Hydro power
• Wind power
• Geo-thermal power

Q.20. Hydro-electric power plants are popular, because

• Initial cost is very less
• Operation and maintenance cost is very less
• Plants can be installed in a very short period
• These can be installed near the load centre

Answer: Operation and maintenance cost is very less

Q.21. The ratio of power produced by the turbine to the energy actually supplied to the turbine is,

• Mechanical efficiency
• Hydraulic efficiency
• Overall efficiency
• Runner efficiency

Q.22. Is it possible to pump water at 100°C under atmospheric conditions using a centrifugal pump placed near the tank

• Yes
• No
• Yes, if pump is properly selected
• Yes, if material of the pump is properly selected

Q.23. For high head and small discharges, which pump is preferred

• reciprocating pump
• centrifugal pump
• screw pump
• gear pump

Q.24. Minimum power which can be generated throughout the year by a hydroelectric plant is known as

• base power
• firm power
• secondary power
• installed power