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Showing posts with label Mechanical. Show all posts
Showing posts with label Mechanical. Show all posts

Thursday, February 6, 2020

FLUID MECHANICS MCQS SET 21
February 06, 2020

FLUID MECHANICS MCQS SET 21

FLUID MECHANICS MCQS SET 21

1. What does CPO stand for?
a) Centrifugal pump operation
b) Centrifugal part operation
c) Centrifugal pump output
d) Centrifugal part output
 
Answer: a

2. Self priming pumps overshadow the function of __________
a) Self auxiliary device
b) Wear rate
c) Corrosion device
d) Cavitation device
 
Answer: a

3. What is necessary for self priming to take place?
a) Draft tube
b) Pump casing
c) Suspended solenoids
d) Turbine head
 
Answer: b

4. Centrifugal pumps with an internal suction stage are called as _________
a) Series pumps
b) Self priming pumps
c) Froth pumps
d) Drive pumps
 
Answer: b

5. Two phase mixture is pumped unit the suction line is evacuated.
a) True
b) False
 
Answer: a

6. During normal working operation, the pump works like __________
a) Centrifugal pumps
b) Self priming pumps
c) Froth pumps
d) Drive pumps
 
Answer: a

7. The pump function that works on rinsing is called as dialysis of pump.
a) True
b) False
 
Answer: a

8. What is purpose of vent valve in a pump?
a) High pressure control
b) High temperature control
c) Froths are generated can be minimized
d) To prevent siphon action
 
Answer: d


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FLUID MECHANICS MCQS SET 20
February 06, 2020

FLUID MECHANICS MCQS SET 20

FLUID MECHANICS MCQS SET 20

1. Pump is always supported by bearings.
a) True
b) False
 
Answer: b

2. If we use an impeller inducer, we can reduce the cavitation in a centrifugal pump.
a) True
b) False
 
Answer: a

3. There will be leakage only if there is ________
a) High pressure
b) High temperature
c) Froths are generated
d) Casing breakage
 
Answer: d

4. When a pump casing is filled with liquid before it is started, it is called as _________
a) Adiabatic expansion
b) Priming
c) Adiabatic compression
d) Isentropic expansion
 
Answer: b
5. The pump will become incapable of pumping in case of _______
a) Gas bounding
b) Throttle bush
c) Stuffing box
d) Casing breakage
 
Answer: d

6. Priming is needed when impeller cannot impart enough _________
a) Draft speed
b) Energy
c) Pressure
d) Heat
 
Answer: b

7. Priming performs response using ________
a) Stimulus
b) Froth
c) Slurry
d) Heat
 
Answer: a

8. To avoid gas bounding, the pump is _________
a) Heated
b) Elevated
c) Primed
d) Charged
 
Answer: c

9. Centrifugal pumps are located ________ the level of source
a) Below
b) Above
c) Parallel with
d) Series with
 
Answer: a

10. A pump that can evacuate air is called as _________
a) Series pumps
b) Self priming pumps
c) Froth pumps
d) Drive pumps
 
Answer: b
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FLUID MECHANICS MCQS SET 19
February 06, 2020

FLUID MECHANICS MCQS SET 19

FLUID MECHANICS MCQS SET 19

1. If we lower the temperature, the water pump cavitation ________
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: b

2. Which among the following is not a centrifugal pump?
a) Sand pumps
b) Froth pumps
c) Slurry pumps
d) Energy pumps
 
Answer: d

3. Centrifugal pumps work under the same principle, but differ in their _______
a) Working
b) Functions
c) Dimensions
d) Impeller
 
Answer: b

4. If we raise the liquid level in the suction vessel, cavitation ______
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: b

5. Magnetic coupled pumps are also called as _________
a) Series pumps
b) Parallel pumps
c) Froth pumps
d) Drive pumps
 
Answer: d

6. Magnetic coupled pumps works via ________
a) Antiferromagnet
b) Drive magnet
c) Pump magnet
d) Ferromagnet
 
Answer: b

7. When we change the pump, the cavitation ______
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: b

8. If we reduce the motor rpm in an impeller, cavitation _______
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: b

9. Decreasing the diameter of the eye of the impeller, cavitation _________
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: a

10. No gland is needed for the centrifugal pump.
a) True
b) False
 
Answer: a
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FLUID MECHANICS MCQS SET 18
February 06, 2020

FLUID MECHANICS MCQS SET 18

FLUID MECHANICS MCQS SET 18

1. What is the full form of NPSH in a pump?
a) Net pressure suction head
b) Net positive suction head
c) Non-pressure suction head
d) Net pressure super head
 
Answer: b

2. When the NPSH is low, it leads to ________
a) Breaking
b) Wear
c) Corrosion
d) Cavitation
 
Answer: d

3. Wear of impeller can be worsened by __________
a) Draft tube
b) Pump pressure
c) Suspended solenoids
d) Turbine head
 
Answer: c

4. Which pump is the most efficient centrifugal pump?
a) Electrical pump
b) Reciprocating pump
c) Heat pump
d) Pressure pump
 
Answer: b

5. Corrosion in the pump is developed due to _______
a) Pressure of air
b) Fluid properties
c) Draft tube
d) Tank dimensions
 
Answer: b

6. Over heating is a major problem faced in a pump.
a) True
b) False
 
Answer: a

7. What is the effect of cavitation in boat propeller?
a) It recirculates air
b) The pressurizes the air
c) It leads to fast spinning
d) It breaks the bubbles
 
Answer: c

8. Lack of prime is a problem faced in centrifugal pump.
a) True
b) False
 
Answer: a

9. The energy usage of a pump is determined by _______
a) Adiabatic expansion
b) Power required
c) Adiabatic compression
d) Isentropic expansion
 
Answer: b

10. For an oil field to have solid control, it needs _______
a) Draft tubes
b) Throttle bush
c) Stuffing box
d) Centrifugal pumps
 
Answer: d
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FLUID MECHANICS MCQS SET 17
February 06, 2020

FLUID MECHANICS MCQS SET 17

FLUID MECHANICS MCQS SET 17

1. The energy transferred can be measured by isentropic compression.
a) True
b) False
 
Answer: a

2. What does TDH stand for?
a) Total dynamic head
b) Total depth head
c) Tight drum head
d) Target dynamic head
 
Answer: a

3. The mechanical energy is developed by the impeller.
a) True
b) False
 
Answer: a

4. The mechanical energy can be measured by ______
a) Adiabatic expansion
b) Isentropic compression
c) Adiabatic compression
d) Isentropic expansion
 
Answer: b

5. How many impellers does a multistage centrifugal pump have?
a) Zero
b) One
c) Exactly two
d) Two and more
 
Answer: d

6. The energy usage in pumping installation is determined by _______
a) Friction characteristics
b) Pipe diameter
c) Surface tension
d) Thermal expansion
 
Answer: a

7. Which among the following is a friction factor?
a) Newtons factor
b) Darcy’s factor
c) Transfer temperature
d) Heizenberg’s factor
 
Answer: b

8. What is the dimension for Darcy’s friction factor?
a) kg/m
b) N/mm
c) kg
d) Dimensionless
 
Answer: d

9. Formation of bubbles in an impeller is called ______
a) Cavities
b) Defects
c) Friction
d) Heat burn
 
Answer: a

10. Centrifugal pump works by imparting _______
a) Potential energy
b) Kinetic energy
c) Heat energy
d) Electrical energy
 
Answer: b
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FLUID MECHANICS MCQS SET 16
February 06, 2020

FLUID MECHANICS MCQS SET 16

FLUID MECHANICS MCQS SET 16

1. At each stage the fluid is directed ________
a) Towards the centre
b) Away the centre
c) Towards the surface
d) Away from the centre
 
Answer: a

2. If the cylinder is filled with fuel or air it is said to be ___________
a) 100% efficient
b) Transfer efficient
c) Nil efficient
d) Flow effective
 
Answer: a

3. SOH in a pump stands for_______
a) Shut Off head
b) Shut off heat
c) Shut off hybrid
d) Set off head
 
Answer: a

4. At higher pressures, the impeller is connected in _______
a) Series
b) Parallel
c) Equilibrium
d) Series and parallel
 
Answer: a

5. When the flow output is higher, impellers are connected in________
a) Series
b) Parallel
c) Equilibrium
d) Series and parallel
 
Answer: b

6. The point at which piping system controls the flow rate is called ______
a) Pressure point
b) Static lift
c) Operating point
d) Flow point
 
Answer: c

7. What is the common application of multistage centrifugal pump?
a) Mineral industries
b) Boiler feed water pump
c) Removes ores
d) Detects oil
 
Answer: b

8. A multistage centrifugal pump produces a pressure of __________
a) 10 Pa
b) 100 MPa
c) 21 MPa
d) 150 MPa
 
Answer: c

9. All energy that is transferred from the fluid is derived from ________
a) Electrical energy
b) Mechanical energy
c) Thermal energy
d) Chemical energy
 
Answer: b

10. The point at which the centrifugal pump operates at maximum efficiency is called _______
a) Duty point
b) Flow point
c) Static point
d) Operating point
 
Answer: a
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FLUID MECHANICS MCQS SET 15
February 06, 2020

FLUID MECHANICS MCQS SET 15

FLUID MECHANICS MCQS SET 15

1. The height of a column in a pump is called as _______
a) Vertical head
b) Horizontal head
c) Static head
d) Multi head
 
Answer: c
 
2. The centrifugal pump has varying flow depending on the _________
a) Pressure
b) Static lift
c) Volume
d) Flow rate
 
Answer: a

3. What is purpose of froth in froth pumps?
a) Separates rich minerals
b) Mixes rich minerals
c) Removes ores
d) Detects oil
 
Answer: a

4. Froth contains air that blocks the pumps.
a) True
b) False
 
Answer: a

5. When froth blocks the pump, it leads to _______
a) Separation of rich minerals
b) Mixing of rich minerals
c) Removing of ores
d) Loss of prime
 
Answer: d

6. What affects volumetric efficiency of the pump?
a) Complex interactions
b) Internal interactions
c) Retain flow
d) Air flow
 
Answer: a

7. The Positive Displacement Pump has more or less a constant flow regardless of the system pressure or head.
a) True
b) False
 
Answer: a

8. What is the purpose of inducer in a froth pump?
a) It recirculates air
b) The pressurizes the air
c) Froths are generated
d) It breaks the bubbles
 
Answer: d

9. A multistage centrifugal pumps has more than two _______
a) Pumps
b) Impellers
c) Turbines
d) Magnetic pumps
 
Answer: b

10. The impeller is mounted on a ________
a) Draft tube
b) Throttle bush
c) Stuffing box
d) Shaft
 
Answer: d
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FLUID MECHANICS MCQS SET 14
February 06, 2020

FLUID MECHANICS MCQS SET 14

FLUID MECHANICS MCQS SET 14

1. Vertical centrifugal pumps are also called as cantilever pumps.
a) True
b) False
 
Answer: a

2. With increase in power, the efficiency_________
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: a

3. Vertical pumps utilize unique shaft and bearing support configuration.
a) True
b) False
 
Answer: a

4. Which among the following is used in mineral industries?
a) Vertical pumps
b) Horizontal pumps
c) Froth pumps
d) Multistage pumps
 
Answer: c

5. Vertical centrifugal pumps are also called as ________
a) Froth pumps
b) Multistage pumps
c) Cantilever pumps
d) Magnetic pumps

Answer: c

6. Vertical pump uses _______
a) Draft tube
b) Throttle bush
c) Stuffing box
d) Interlining
 
Answer: b

7. When the casing in a centrifugal pump decelerates the flow, what increases?
a) Pressure
b) Temperature
c) Volume
d) Flow rate
 
Answer: a

8. The maximum volumetric efficiency of a pump(100cc) is ________
a) 60%
b) 70%
c) 80%
d) 90%
 
Answer: d

9. The most common application of vertical centrifugal pump is used in _______
a) Parts washer
b) Mineral industry
c) Paper plating
d) Jukebox
 
Answer: a
10. What does BEP stand for?
a) Best efficiency point
b) Brake ejection point
c) Break effect point
d) Best effect point
 
Answer: a
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FLUID MECHANICS MCQS SET 13
February 06, 2020

FLUID MECHANICS MCQS SET 13

FLUID MECHANICS MCQS SET 13

1. What is the unit of flow rate?
a) kg.m
b) kg/m
c) m3/s
d) /s
 
Answer: c

2. With the increase in the flow rate, efficiency ______
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: b

3. Pump efficiency is defined as the ratio of ___________
a) Pressure to temperature
b) Temperature to pressure
c) Water horsepower to pump horsepower
d) Pump horse power to water horse power
 
Answer: c

4. The difference in the total head of the pump is called _______
a) Manometric head
b) Euler head
c) Pressure head
d) Shaft head
 
Answer: a

5. The ratio of manometric head to the work head is called _______
a) Manometric head
b) Euler head
c) Pressure head
d) Shaft head
 
Answer: b

6. What is the unit of energy head?
a) m
b) m/s
c) m3/s
d) /s
 
Answer: a

7. With the increase in energy head, efficiency ________
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: b

8. The head added by the pump is a sum of _________
a) Pressure
b) Static lift
c) Volume
d) Flow rate
 
Answer: b

9. Power is most commonly expressed as ________
a) m
b) kW
c) m3/s
d) /s
 
Answer: b

10. PHE stands for __________
a) Pump Hydraulic efficiency
b) Pressure Hydraulic efficiency
c) Power Hydraulic efficiency
d) Pump hydraulic engine
 
Answer: a
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FLUID MECHANICS MCQS SET 12
February 06, 2020

FLUID MECHANICS MCQS SET 12

FLUID MECHANICS MCQS SET 12

1. Change of angular momentum is equal to ________
a) Sum of external moments
b) Sum of their potential energies
c) Sum of their kinetic energies
d) Sum of their pressures
 
Answer: a

2. Euler developed the head pressure equation in centrifugal pumps.
a) True
b) False
 
Answer: a

3. What is a major advantage of centrifugal pump?
a) Cost
b) Simple in construction
c) Efficiency
d) Pump parameters
 
Answer: b

4. ‘Ht’ means _______
a) Tangential head
b) Horizontally head
c) Theory head pressure
d) Radially head pressure
 
Answer: c

5. Centrifugal pumps are used to transport ________
a) Pressure
b) Speed
c) Power
d) Fluid
 
Answer: d

6. Different velocities in a centrifugal pump are determined by using ________
a) Velocity triangle
b) Reynolds number
c) Froude number
d) Overall efficiency
Answer: a

7. Due to its impeller action, centrifugal pumps can cover a wide range of fluid pump applications.
a) True
b) False
 
Answer: a

8. With the increase in the input power, efficiency _______
a) Increases
b) Decreases
c) Same
d) Independent
 
Answer: b

9. What is unit of standard acceleration?
a) kg/m
b) kg/s
c) kg/m3
d) N/m
 
Answer: c

10. What does PSP stand for?
a) Pump start procedure
b) Positive start pump
c) Pump start pointer
d) Positive start pointer
 
Answer: a
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FLUID MECHANICS MCQS SET 11
February 06, 2020

FLUID MECHANICS MCQS SET 11

FLUID MECHANICS MCQS SET 11

1. Vertical Centrifugal pumps are also called as _________
a) Cantilever pumps
b) Hydrodynamic pump
c) Mechanical pump
d) Hydroelectric pump
 
Answer: a
 
2. With the increase in load, Energy in the turbine________
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: a

3. The rotational kinetic energy comes from ______
a) Engine motor
b) Pump
c) Tank
d) Draft tube
 
Answer: a

4. When the balancing of the turbine is disturbed, we use ________
a) Throttle governing
b) Steam governing
c) Nozzle governing
d) Emergency governing
 
Answer: d

5. Gear pumps are ___________
a) Tangential flow pumps
b) Positive displacement pumps
c) Negative displacement pumps
d) Radial pumps
 
Answer: a

6. The fluid gains _________ while passing through the impeller.
a) Velocity
b) Pressure
c) Temperature
d) Velocity and pressure
 
Answer: d

7. What is the shape of the diffuser in the centrifugal pump?
a) Round
b) Dough nut
c) Rectangle
d) Cylindrical
 
Answer: b

8. When the casing in a centrifugal pump decelerates the flow, what increases?
a) Pressure
b) Temperature
c) Volume
d) Flow rate
 
Answer: a

9. The velocity imparted by the impeller is converted into _________
a) Pressure energy
b) Kinetic energy
c) Momentum
d) Potential energy
 
Answer: a

10. The consequence of Newtons second law is_________
a) Conservation of angular momentum
b) Conservation of mass
c) Conservation of potential energy
d) Conservation of kinetic energy
 
Answer: a
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FLUID MECHANICS MCQS SET 10
February 06, 2020

FLUID MECHANICS MCQS SET 10

FLUID MECHANICS MCQS SET 10

1. A gear pump uses ___________
a) Petrochemical pumps
b) Meshing of gears
c) Froth pumps
d) Airlift pumps
Answer: b

2. The fundamental significance of all the turbomachinery is _______
a) Conservation of momentum
b) Conservation of mass
c) Conservation of heat
d) Conservation of speed
Answer: a

3. The most common pump used for hydraulic fluid power application is __________
a) Centrifugal pumps
b) Gear pump
c) Froth pumps
d) Airlift pumps
 
Answer: b

4. The change of angular momentum in a pump is equal to the _________
a) Sum of speeds
b) Sum of individual momentum
c) Sum of temperatures
d) Sum of energy transferred from a body
 
Answer: b

5. Conservation of angular momentum is described by _______
a) Newtons equation
b) Euler’s equation
c) Rutherford’s equation
d) Maxim equation
 
Answer: b

6. Gear pumps are mainly used in chemical installations because they pump ________
a) High viscosity fluids
b) High density fluids
c) High pressure fluids
d) High temperature fluids
 
Answer: a
 
7. Gear pumps convert rotational kinetic energy to hydrodynamic energy.
a) True
b) False
 
Answer: a

8. The inlet passage of centrifugal pump is controlled by ________
a) Gate
b) Head race
c) Turbine
d) Pump
 
Answer: a

9. Absolute exit velocity in a pump is denoted as ______
a) c2
b) v2
c) p2
d) w2
 
Answer: a

10. Gear pumps are used to transport ________
a) Pressure
b) Speed
c) Power
d) Fluid
 
Answer: d
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FLUID MECHANICS MCQS SET 09
February 06, 2020

FLUID MECHANICS MCQS SET 09

FLUID MECHANICS MCQS SET 09

1. Which among the following control the flow rate?
a) Valve
b) Pump
c) Head
d) Tank pipe
 
Answer: a

2. The advantage of nozzle governing is that no regulating pressure is applied.
a) True
b) False
 
Answer: a

3. The inlet passage of water entry is controlled by ________
a) Head race
b) Gate
c) Tail race
d) Pump
 
Answer: b

4. When do we apply by pass governing?
a) When turbine is overloaded
b) When Unit speed decreases
c) When Unit power increases
d) When Unit pressure decreases
 
Answer: a

5. When bypass valve is opened to _______
a) Increase Pressure
b) Increase Unit speed
c) Increase Unit power
d) Increase the amount of fresh steam
 
Answer: d

6. What is the unit of steam rate?
a) kg
b) kg/m
c) kg/kWh
d) N/m
 
Answer: c

7. With the increase in load, Energy in the turbine ________
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: a

8. Combination governing involves usage of two or more governing.
a) True
b) False
 
Answer: a

9. When the mechanical speed of the shaft increases beyond 110 percent, we use _________
a) Throttle governing
b) Steam governing
c) Nozzle governing
d) Emergency governing
 
Answer: d

10. When the balancing of the turbine is disturbed, we use ________
a) Throttle governing
b) Steam governing
c) Nozzle governing
d) Emergency governing
 
Answer: d
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FLUID MECHANICS MCQS SET 08
February 06, 2020

FLUID MECHANICS MCQS SET 08

FLUID MECHANICS MCQS SET 08

1. Centrifugal pumps transport fluids by converting _________
a) Kinetic energy to hydrodynamic energy
b) Hydrodynamic energy to kinetic energy
c) Mechanical energy to kinetic energy
d) Mechanical energy to Hydrodynamic energy
 
Answer: a

2. With the increase in load, Energy in the turbine________
a) Decreases
b) Increases
c) Remains same
d) Independent
 
Answer: a

3. The rotational kinetic energy comes from ______
a) Engine motor
b) Pump
c) Tank
d) Draft tube
 
Answer: a

4. When the balancing of the turbine is disturbed, we use ________
a) Throttle governing
b) Steam governing
c) Nozzle governing
d) Emergency governing
 
Answer: d

5. The fluid coming into the centrifugal pump is accelerated by ________
a) Throttle
b) Impeller
c) Nozzle
d) Governor
 
Answer: b

6. In nozzle governing, the flow rate of steam is regulated by _________
a) Nozzles
b) Pumping
c) Drafting
d) Intercooling
 
Answer: a

7. The flow rate of steam is controlled by regulating the_________
a) Steam
b) Pressure
c) Temperature
d) Speed
 
Answer: b

8. The main function of nozzle is to __________
a) Varying temperatures
b) Pressure variations
c) Load variations
d) Heat variations
 
Answer: b

9. What is primary objective of steam turbine governing?
a) Maintain constant speed
b) Maintain constant pressure
c) Maintain constant temperature
d) Maintain constant expansion
 
Answer: a

10. Which among the following is not a parameter to determine the efficiency of the turbine?
a) Unit speed
b) Unit power
c) Unit volume
d) Unit discharge
 
Answer: c
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FLUID MECHANICS MCQS SET 07
February 06, 2020

FLUID MECHANICS MCQS SET 07

FLUID MECHANICS MCQS SET 07

1. Centrifugal pump is a_________
a) Turbomachinery
b) Flow regulating device
c) Drafting device
d) Intercooling device
 
Answer: a

2. Turbomachines work under ________
a) Newtons first law
b) Newtons second law
c) Newtons third law
d) Kepler’s law
 
Answer: b

3. The main function of nozzle is to __________
a) Varying temperatures
b) Pressure variations
c) Load variations
d) Heat variations
 
Answer: b

4. The main function of centrifugal pumps are to ________
a) Transfer speed
b) Transfer pressure
c) Transfer temperature
d) Transfer energy
 
Answer: d

5. Centrifugal pumps transfer energy from _______
a) Rotor to fluid
b) Fluid to rotor
c) Draft to rotor
d) Rotor to draft
 
Answer: a

6. Which among the following control the flow rate?
a) Valve
b) Pump
c) Head
d) Tank pipe
 
Answer: a

7. Turbines and compressors work with the gas, while centrifugal pump transfers energy.
a) True
b) False
 
Answer: a

8. The inlet passage of water entry is controlled by ________
a) Head race
b) Gate
c) Tail race
d) Pump
 
Answer: b

9. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery.
a) True
b) False
 
Answer: a
 
10. Centrifugal pumps are used to transport ________
a) Pressure
b) Speed
c) Power
d) Fluid
 
Answer: d
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FLUID MECHANICS MCQS SET 06
February 06, 2020

FLUID MECHANICS MCQS SET 06

FLUID MECHANICS MCQS SET 06

1. The main property that affects a boundary layer is__________
a) Temperature
b) Pressure
c) Viscosity
d) Surface tension

Answer: c
 
2. The layer that is influenced by a planetary boundary is called______
a) Atmospheric boundary layer
b) Lithosphere
c) Troposphere
d) Hydrosphere
 
Answer: a

3. What is the other name for Stoke’s boundary layer?
a) Momentum boundary layer
b) Atmospheric boundary layer
c) Oscillatory boundary layer
d) Thermal boundary layer
 
Answer: c

4. Eddy viscosity is a turbulent transfer of_________
a) Fluid
b) Heat
c) Momentum
d) Pressure
 
Answer: c

5. The laminar boundary layer is a _________
a) Smooth flow
b) Rough flow
c) Uniform flow
d) Random flow
 
Answer: a

6. The turbulent boundary layer is a _________
a) Non-uniform with swirls
b) Uniform
c) Less stable
d) Smooth
 
Answer: a

7. How do we measure the flow rate of liquid?
a) Coriolis method
b) Dead weight method
c) Conveyor method
d) Ionization method
 
Answer: a

8. How does a turbulent boundary layer produce swirls?
a) Due to random motion
b) Collision of molecules
c) Due to eddies
d) Due to non-uniform cross section
 
Answer: c

9. Define Viscosity.
a) Resistance to flow of object
b) Resistance to flow of air
c) Resistance to flow of fluid
d) Resistance to flow of heat
 
Answer: c

10. The continuity equation of two- dimensional steady incompressible flow is_______

 
Answer: a
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FLUID MECHANICS MCQS SET 05
February 06, 2020

FLUID MECHANICS MCQS SET 05

FLUID MECHANICS MCQS SET 05

1. How can we determine whether the flow is laminar or turbulent?
a) Reynold’s number
b) Mach number
c) Froude number
d) Knudsen number
 
Answer: a

2. The flow separation occurs when the fluid travels away from the __________
a) Surface
b) Fluid body
c) Adverse pressure gradient
d) Inter-molecular spaces
Answer: c

3. The swirl caused due to eddies are called as ______
a) Vortices
b) Vertices
c) Volume
d) Velocity
 
Answer: a

4. Eddy viscosity is a turbulent transfer of_________
a) Fluid
b) Heat
c) Momentum
d) Pressure
 
Answer: c

5. Which among the following is a device that converts a laminar flow into a turbulent flow?
a) Dead Weight Gauge
b) Vacuum Gauge
c) Turbulator
d) Ionization Gauge
 
Answer: c

6. Boundary layer separation does not undergo detachment.
a) True
b) False
 
Answer: b

7. With the boundary layer separation, displacement thickness________
a) Increases
b) Decreases
c) Remains Same
d) Independent
 
Answer: a

8. What is the instrument used for the automatic control scheme during the fluid flow?
a) Rotameters
b) Pulley plates
c) Rotary Piston
d) Pilot Static Tube
 
Answer: d

9. What is D’Alembert’s Paradox?
a) Resistance= 0
b) Drag force= 0
c) Temperature = 0
d) Pressure gradient= 0
 
Answer: b
 
10. The steady- state flow must satisfy ___________
a) Kirchhoff’s law
b) Newtons law
c) Rutherford’s experiment
d) Kepler’s law
 
Answer: a
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FLUID MECHANICS MCQS SET 04
February 06, 2020

FLUID MECHANICS MCQS SET 04

FLUID MECHANICS MCQS SET 04

1. Which kind of turbine is a Pelton Wheel turbine?
a) Tangential flow turbine.
b) Radial flow turbine
c) Outward flow turbine
d) Inward flow turbine
 
Answer: a

2. IN what type of turbine water enters in radial direction and leaves axial direction?
a) Tangential flow turbine
b) Axial flow turbine
c) Outward flow turbine
d) Mixed flow turbine
 
Answer: d

3. How many types of turbines can you classify on the basis of direction of flow through runner?
a) 6
b) 3
c) 4
d) 7
 
Answer: c

4. Into how many types can you classify radial flow turbines?
a) 4
b) 3
c) 6
d) 2
 
Answer: d

5. Into how many types can you classify turbines on basis of head at inlet?
a) 3
b) 4
c) 6
d) 5
 
Answer: a

6. Which method is used exclusively in fluid mechanics?
a) Lagrangian method
b) Eulerian method
c) Both Lagrangian and Eulerian methods
d) Neither Lagrangian nor Eulerian method
 
Answer: b

7. What type of flow can be taken for granted in a pipe of a uniform cross-section?
a) steady
b) unsteady
c) uniform
d) non-uniform
 
Answer: c
 
8. Can the flow inside a nozzle be steady and uniform?
a) yes
b) never
c) it can be steady but never uniform
d) it can be uniform but never steady
 
Answer: c
 
9. Which of the following statements is true regarding one and two-dimensional flows?
a) Flow in a pipe is always taken as one-dimensional flow
b) Flow in a pipe is always taken as two-dimensional flow
c) Flow in a pipe is taken as one-dimensional flow when average flow parameters are considered
d) Flow in a pipe is taken as two-dimensional flow when average flow parameters are considered
 
Answer: c
 
10. Which of the following is true?
a) Flow is rotational inside the boundary layer and irrotational outside
b) Flow is irrotational inside the boundary layer and rotational outside
c) Flow is rotational both inside and outside of the boundary layer
d) Flow is irrotational both inside and outside of the boundary layer
 
Answer: a

11. Which of the following is true?
a) Flow is laminar inside the boundary layer and turbulent outside
b) Flow is turbulent inside the boundary layer and laminar outside
c) Flow is laminar both inside and outside of the boundary layer
d) Flow is turbulent both inside and outside of the boundary layer
 
Answer: a
 
12. “The velocity of entrance and exit through a nozzle remains the same.” Is this ever possible?
a) only if the flow is compressible
b) only if the flow is laminar
c) only if the flow is rotational
d) never possible
 
Answer: a
 
13. Three flows named as 1,2 and 3 are observed. The Reynold’s number for the three are 100, 1000 and 10000. Which of the flows will be laminar?
a) only 1
b) only 1 and 2
c) 1, 2 and 3
d) only 3
 
Answer: b

14. Three flows named as 1,2 and 3 are observed. The flow velocities are v1 and v2. If all other geometrical factors remain the same along with the fluid considered, flow is more likely to be laminar?
a) flow 1 if v1 > v2
b) flow 2 if v1 > v2
c) always flow 1
d) always flow 2
 
Answer: b

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FLUID MECHANICS MCQS SET 03
February 06, 2020

FLUID MECHANICS MCQS SET 03

FLUID MECHANICS MCQS SET 03

1. Which type of turbine is a Francis Turbine?
a) Impulse Turbine
b) Screw Turbine
c) Reaction turbine
d) Turgo turbine
 
Answer: c

2. How many types of Reaction turbines are there?
a) 5
b) 4
c) 3
d) 9
 
Answer: a

3. Turgo Turbine is an impulsive turbine.
a) True
b) False
 
Answer: a

4. Which kind of turbine is a Fourneyron Turbine?
a) Inward flow turbine
b) Outward flow turbine
c) Mixed flow turbine
d) Radial flow turbine
 
Answer: b

5. Maximum Number of jets, generally, employed in an impulse turbine without jet interference can be?
a) 2
b) 3
c) 4
d) 6
 
Answer: d

6. The overall efficiency of a reaction turbine is the ratio of
a) Actual work available at the turbine to the energy imparted to the wheel
b) Work done on the wheel to the energy (or head of water) actually supplied to the turbine
c) Power produced by the turbine to the energy actually supplied by the turbine
d) Actual work available at the turbine to energy imparted to the wheel
 
Answer: a 

7. In a reaction turbine, the draft tube is used to _________
a) To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race
b) To prevent air to enter the turbine
c) To increase pressure energy of water
d) To transport water to downstream
 
Answer: a

8. In reaction turbine hydraulic efficiency is______________
a) Ratio of actual work at the turbine to the energy imparted to the wheel.
b) Ratio of work done on the wheel to energy that is supplied to the turbine.
c) Ratio of power produced by the turbine to the energy actually supplied by the turbine.
d) Ratio of Work done on the wheel to the energy (or head of water) actually supplied to the turbine.
 
Answer: b
 
9. Consider an inward flow reaction turbine, here, water _______
a) Flows parallel to the axis of the wheel
b) Enters the wheel at the outer periphery and then flows towards the centre of the wheel
c) Flow is partly radial and partly axial
d) Enters at the centre of the wheel and then flows towards the outer periphery of the wheel
 
Answer: b

10. The working of which of the following hydraulic units is based on Pascal’s law?
a) Air lift pump
b) Hydraulic coupling
c) Hydraulic press
d) Jet pump
 
Answer: c
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FLUID MECHANICS MCQS SET 02
February 06, 2020

FLUID MECHANICS MCQS SET 02

FLUID MECHANICS MCQS SET 02

1. Impulse turbine is generally fitted at ______________
a) At the level of tail race
b) Above the tail race
c) Below the tail race
d) About 2.5mts above tail race to avoid cavitations.
 
Answer: b

2. Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that?
a) Mechanical Energy
b) Electrical Energy
c) Nuclear Energy
d) Elastic Energy
 
Answer: a

3. In hydraulic turbines, inlet energy is greater than the outlet energy.
a) True
b) False
 
Answer: a

4. Which principle is used in Hydraulic Turbines?
a) Faraday law
b) Newton’s second law
c) Charles law
d) Braggs law
 
Answer: b

5. Buckets and blades used in a turbine are used to:
a) Alter the direction of water
b) Switch off the turbine
c) To regulate the wind speed
d) To regenerate the power
 
Answer: a

6. _______________is the electric power obtained from the energy of the water.
a) Roto dynamic power
b) Thermal power
c) Nuclear power
d) Hydroelectric power
 
Answer: d

7. Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft?
a) Mechanical Energy
b) Potential Energy
c) Elastic Energy
d) Kinetic Energy
 
Answer: a

8. Hydraulic Machines fall under the category :
a) Pulverizers
b) Kinetic machinery
c) Condensers
d) Roto-dynamic machinery
 
Answer: d

9. Which kind of turbines changes the pressure of the water entered through it?
a) Reaction turbines
b) Impulse turbines
c) Reactive turbines
d) Kinetic turbines
 
Answer: a

10. Which type of turbine is used to change the velocity of the water through its flow?
a) Kinetic turbines
b) Axial flow turbines
c) Impulse turbines
d) Reaction turbines
 
Answer: c
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