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
Answer: Density
Q.2. Viscosity has the following dimensions
- MLT-2
- ML-1T-2
- ML-2T-2
- ML-1T-1
Answer: ML-1T-1
Q.3. Kinematic viscosity has the dimensions
- L2T-2
- L2T-1
- ML2T-2
- MLT-1
Answer: L2T-1
Q.4. Dynamic viscosity has the units
- kg/(msec)
- Ns/m3
- kg.m/sec
- Nm/sec
Answer: kg/(msec)
Q.5. One S.I. unit of viscosity is equal to
- 10 poises
- 981 poises
- 9.81 Ns/m2
- 10 kg.seclm2
Answer: 10 poises
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
Answer: Work per unit weight
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
- Steady, irrotational, uniform
- Steady, frictionless, incompressible
Answer: Steady, frictionless, incompressible
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%
- about 90%
- 80% to 90%
- less than 80%
Answer: more than 95%
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%
Answer: 97.5%
Q.12. If a hydro plant operate under a head of 100 m, it may be classified as
- a very high speed plant
- high head plant
- medium head plant
- low head plant
Answer: medium head plant
Q.13. Run-of-river plants are usually
- low head plants
- medium head plants
- high head plants
- very high head plants
Answer: low head plants
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
- head of the 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
Answer: Solar power
Q.19. Baseload demands are met by
- Thermal power
- Hydro power
- Wind power
- Geo-thermal power
Answer: 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
Answer: Overall 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
Answer: No
Q.23. For high head and small discharges, which pump is preferred
- reciprocating pump
- centrifugal pump
- screw pump
- gear pump
Answer: reciprocating 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
Answer: firm power
Q.25. Load factor is equal to the ratio of
- peak load to average load
- average load to the maximum load
- average load to the installed capacity
- average utilization to the actual load
Answer: average load to the maximum load