905 + Mcqs in Hydraulics And Fluid Mechanics In Me Page 9 McqOptions

401.	/_The total pressure on an immersed surface inclined at an angle ≈í‚àè with the liquid surface is?
A.	wA
B.	wx
C.	wAx
D.	wAx/sin≈í‚àè
Answer» D. wAx/sin≈í‚àè

Discussion

402.	/_A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a?
A.	Notch
B.	Weir
C.	Mouthpiece
D.	Nozzle
Answer» D. Nozzle

Discussion

403.	/_Bernoulli's equation is applied to?
A.	Venturimeter
B.	Orifice meter
C.	Pitot tube
D.	All of these
Answer» E.

Discussion

404.	/_Medium specific speed of turbine implies it is?
A.	Propeller turbine
B.	Francis turbine
C.	Impulse turbine
D.	Any one of the above
Answer» C. Impulse turbine

Discussion

405.	/_Fluid is a substance which offers no resistance to change of?
A.	Pressure
B.	Flow
C.	Shape
D.	Volume
Answer» D. Volume

Discussion

406.	/_The optimum value of vane exit angle for a centrifugal pump impeller is?
A.	10-15¬¨‚àû
B.	20-25¬¨‚àû
C.	30-40¬¨‚àû
D.	50-60¬¨‚àû
Answer» C. 30-40¬¨‚àû

Discussion

407.	/_The tangential velocity of the water element having a free vortex is?
A.	Directly proportional to its distance from the centre
B.	Inversely proportional to its distance from the centre
C.	Directly proportional to its (distance)2 from the centre
D.	Inversely proportional to its (distance)2 from the centre
Answer» C. Directly proportional to its (distance)2 from the centre

Discussion

408.	/_An ideal flow of any fluid must satisfy?
A.	Pascal law
B.	Newton's law of viscosity
C.	Boundary layer theory
D.	Continuity equation
Answer» E.

Discussion

409.	/_If the surface of liquid is convex, men?
A.	Cohesion pressure is negligible
B.	Cohesion pressure is decreased
C.	Cohesion pressure is increased
D.	There is no cohesion pressure
Answer» D. There is no cohesion pressure

Discussion

410.	/_Working principle of dead weight pressure gauge tester is based on?
A.	Pascal's law
B.	Dalton's law of partial pressure
C.	Newton's law of viscosity
D.	Avogadro's hypothesis
Answer» B. Dalton's law of partial pressure

Discussion

411.	/_The divergent portion of a Venturimeter is made longer than convergent portion in order to?
A.	Avoid the tendency of breaking away the stream of liquid
B.	To minimize frictional losses
C.	Both (A) and (B)
D.	None of these
Answer» D. None of these

Discussion

412.	/_The total head of a liquid particle in motion is equal to?
A.	Pressure head + kinetic head + potential head
B.	Pressure head - (kinetic head + potential head)
C.	Potential head - (pressure head + kinetic head)
D.	Kinetic head - (pressure head + potential head)
Answer» B. Pressure head - (kinetic head + potential head)

Discussion

413.	/_Euler's equation in the differential form for the motion of liquids is given by?
A.	dp/≈ì√Ö + g.dz + v.dv = 0
B.	dp/≈ì√Ö - g.dz + v.dv = 0
C.	≈ì√Ö.dp + g.dz + v.dv = 0
D.	≈ì√Ö.dp - g.dz + v.dv = 0
Answer» B. dp/≈ì√Ö - g.dz + v.dv = 0

Discussion

414.	/_General energy equation holds for?
A.	Steady flow
B.	Turbulent flow
C.	Laminar flow
D.	Non-uniform flow
Answer» E.

Discussion

415.	/_For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred?
A.	Centrifugal
B.	Axial flow
C.	Reciprocating
D.	Mixed flow
Answer» C. Reciprocating

Discussion

416.	/_One poise is equal to?
A.	0.1 N-s/m2
B.	1 N-s/m2
C.	10 N-s/m2
D.	100 N-s/m2
Answer» B. 1 N-s/m2

Discussion

417.	/_The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the?
A.	Pressure head
B.	Velocity head
C.	Pressure head + velocity head
D.	Pressure head - velocity head
Answer» B. Velocity head

Discussion

418.	/_The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)?
A.	(≈í¬∫≈ì√Ñ¬¨‚â§N/60t) ‚àö√≥ (R‚Äö√á√Ö - R‚Äö√á√á)
B.	(≈í¬∫≈ì√Ñ¬¨‚â§N/60t) ‚àö√≥ (R‚Äö√á√Ö¬¨‚â§ - R‚Äö√á√á¬¨‚â§)
C.	≈í¬∫≈ì√Ñ¬¨‚â§N/60t) ‚àö√≥ (R‚Äö√á√Ö¬¨‚â• - R‚Äö√á√á¬¨‚â•)
D.	(≈í¬∫≈ì√Ñ¬¨‚â§N/60t) ‚àö√≥ (R‚Äö√á√Ö‚Äö√Ö¬• - R‚Äö√á√á‚Äö√Ö¬•)
Answer» E.

Discussion

419.	/_Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be?
A.	1000 kg
B.	4000 kg
C.	2000 kg
D.	8000 kg
Answer» B. 4000 kg

Discussion

420.	/_The most efficient section of a channel is?
A.	Triangular
B.	Rectangular
C.	Square
D.	Trapezoidal
Answer» E.

Discussion

421.	/_The efficiency of a Pelton wheel working under constant head ________ with the increase in power.?
A.	Remain same
B.	Increases
C.	Decreases
D.	None of these
Answer» C. Decreases

Discussion

422.	/_A hydraulic accumulator normally consists of?
A.	Two cylinders, two rams and a storage device
B.	A cylinder and a ram
C.	Two coaxial rams and two cylinders
D.	A cylinder, a piston, storage tank and control valve
Answer» C. Two coaxial rams and two cylinders

Discussion

423.	/_The specific speed of a turbine is given by the equation?
A.	N‚Äö√ √∂P / H3/2
B.	N‚Äö√ √∂P / H¬¨‚â§
C.	N‚Äö√ √∂P / H5/4
D.	N‚Äö√ √∂P / H3
Answer» D. N‚Äö√ √∂P / H3

Discussion

424.	/_A flow through an expanding tube at constant rate is called?
A.	Steady uniform flow
B.	Steady non-uniform flow
C.	Unsteady uniform flow
D.	Unsteady non-uniform flow
Answer» C. Unsteady uniform flow

Discussion

425.	/_Discharge of a centrifugal pump is?
A.	Directly proportional to diameter of its impeller
B.	Inversely proportional to diameter of its impeller
C.	Directly proportional to (diameter)¬¨‚â§ of its impeller
D.	Inversely proportional to (diameter)¬¨‚â§ of its impeller
Answer» E.

Discussion

426.	/_The ratio of the normal force of jet of water on a plate inclined at an angle of 30¬¨‚àû as compared to that when the plate is normal to jet, is?
A.	1/‚Äö√ √∂2
B.	1/2
C.	1
D.	‚Äö√ √∂2
Answer» C. 1

Discussion

427.	/_Ratio of inertia force to surface Jension is known as?
A.	Mach number
B.	Froude number
C.	Reynolds‚Äö√Ñ√¥s number
D.	Weber‚Äö√Ñ√¥s number
Answer» E.

Discussion

428.	/_A flow whose streamline is represented by a curve, is called?
A.	One-dimensional flow
B.	Two-dimensional flow
C.	Three-dimensional flow
D.	Four-dimensional flow
Answer» C. Three-dimensional flow

Discussion

429.	/_The horizontal component of buoyant force is?
A.	Negligible
B.	Same as buoyant force
C.	Zero
D.	None of the above
Answer» D. None of the above

Discussion

430.	/_If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have?
A.	Geometric similarity
B.	Kinematic similarity
C.	Dynamic similarity
D.	None of these
Answer» B. Kinematic similarity

Discussion

431.	/_A hydraulic coupling belongs to the category of?
A.	Power absorbing machines
B.	Power developing machines
C.	Energy transfer machines
D.	Energy generating machines
Answer» D. Energy generating machines

Discussion

432.	/_Pressure intensifier increases the pressure in proportion to?
A.	Ratio of diameters
B.	Square of ratio of diameters
C.	Inverse ratio of diameters
D.	Square of inverse ratio of diameters
Answer» C. Inverse ratio of diameters

Discussion

433.	/_A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will?
A.	Sink to bottom
B.	Float over fluid
C.	Partly immersed
D.	Be fully immersed with top surface at fluid surface
Answer» E.

Discussion

434.	/_True one-dimensional flow occurs when?
A.	The direction and magnitude of the velocity at all points are identical
B.	The velocity of successive fluid particles, at any point, is the same at successive periods of time
C.	The magnitude and direction of the velocity do not change from point to point in the fluid
D.	The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane
Answer» B. The velocity of successive fluid particles, at any point, is the same at successive periods of time

Discussion

435.	/_The speed of sound in a ideal gas varies directly as it‚Äö√Ñ√¥s?
A.	Absolute temperature
B.	Temperature
C.	Density
D.	Modulus of elasticity
Answer» B. Temperature

Discussion

436.	/_The velocity of the liquid flowing through the divergent portion of a Venturimeter?
A.	Remains constant
B.	Increases
C.	Decreases
D.	Depends upon mass of liquid
Answer» D. Depends upon mass of liquid

Discussion

437.	/_The flow in which conditions do not change with time at any point, is known as?
A.	One dimensional flow
B.	Uniform flow
C.	Steady flow
D.	Turbulent flow
Answer» D. Turbulent flow

Discussion

438.	/_According to equation of continuity,?
A.	w1a1 = w2a2
B.	w1v1 = w2v2
C.	a1v1 = a2v2
D.	a1/v1 = a2/v2
Answer» D. a1/v1 = a2/v2

Discussion

439.	/_Principle of similitude forms the basis of?
A.	Comparing two identical equipments
B.	Designing models so that the result can be converted to prototypes
C.	Comparing similarity between design and actual equipment
D.	Hydraulic designs
Answer» C. Comparing similarity between design and actual equipment

Discussion

440.	/_The product of mass and acceleration of flowing liquid is called?
A.	Inertia force
B.	Viscous force
C.	Gravity force
D.	Pressure force
Answer» B. Viscous force

Discussion

441.	/_Which of the following instrument can be used for measuring speed of an aeroplane??
A.	Venturimeter
B.	Orifice plate
C.	Pitot tube
D.	Rotameter
Answer» D. Rotameter

Discussion

442.	/_A large Reynold number is indication of?
A.	Smooth and streamline flow
B.	Laminar flow
C.	Steady flow
D.	Highly turbulent flow
Answer» E.

Discussion

443.	/_The torque required to overcome viscous resistance of a footstep bearing is (where ≈í¬∫ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)?
A.	≈í¬∫≈ì√Ñ¬¨‚â§NR/60t
B.	≈í¬∫≈ì√Ñ¬¨‚â§NR¬¨‚â§/60t
C.	≈í¬∫≈ì√Ñ¬¨‚â§NR¬¨‚â•/60t
D.	≈í¬∫≈ì√Ñ¬¨‚â§NR‚Äö√Ö¬•/60t
Answer» E.

Discussion

444.	/_A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called?
A.	Steady flow
B.	Uniform flow
C.	Streamline flow
D.	Turbulent flow
Answer» D. Turbulent flow

Discussion

445.	/_In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle '≈í‚àè'. Sensitivity of inclined tube to sensitivity of U-tube is equal to?
A.	Sin≈í‚àè
B.	1/Sin≈í‚àè
C.	Cos ≈í‚àè
D.	1/Cos≈í‚àè
Answer» C. Cos ≈í‚àè

Discussion

446.	/_The property of a fluid which enables it to resist tensile stress is known as?
A.	Compressibility
B.	Surface tension
C.	Cohesion
D.	Adhesion
Answer» D. Adhesion

Discussion

447.	/_High specific speed of a pump implies it is?
A.	Centrifugal pump
B.	Mixed flow pump
C.	Axial flow pump
D.	Any one of the above
Answer» D. Any one of the above

Discussion

448.	/_The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m¬¨‚â§, and V = Velocity of jet in m/s)?
A.	waV / 2g
B.	waV / g
C.	waV¬¨‚â§ / 2g
D.	waV¬¨‚â§ / g
Answer» E.

Discussion

449.	/_The units of dynamic or absolute viscosity are?
A.	Metres¬¨‚â§ per sec
B.	kg sec/meter
C.	Newton-sec per meter
D.	Newton-sec¬¨‚â§ per meter
Answer» D. Newton-sec¬¨‚â§ per meter

Discussion

450.	/_One liter of water occupies a volume of?
A.	100 cm3
B.	250 cm3
C.	500 cm3
D.	1000 cm3
Answer» E.

Discussion

Explore topic-wise MCQs in Mechanical Engineering.

*/*_The total pressure on an immersed surface inclined at an angle ≈í‚àè with the liquid surface is?

*/*_A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a?

*/*_Bernoulli's equation is applied to?

*/*_Medium specific speed of turbine implies it is?

*/*_Fluid is a substance which offers no resistance to change of?

*/*_The optimum value of vane exit angle for a centrifugal pump impeller is?

*/*_The tangential velocity of the water element having a free vortex is?

*/*_An ideal flow of any fluid must satisfy?

*/*_If the surface of liquid is convex, men?

*/*_Working principle of dead weight pressure gauge tester is based on?

*/*_The divergent portion of a Venturimeter is made longer than convergent portion in order to?

*/*_The total head of a liquid particle in motion is equal to?

*/*_Euler's equation in the differential form for the motion of liquids is given by?

*/*_General energy equation holds for?

*/*_For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred?

*/*_One poise is equal to?

*/*_The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the?

*/*_The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)?

*/*_Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be?

*/*_The most efficient section of a channel is?

*/*_The efficiency of a Pelton wheel working under constant head ________ with the increase in power.?

*/*_A hydraulic accumulator normally consists of?

*/*_The specific speed of a turbine is given by the equation?

*/*_A flow through an expanding tube at constant rate is called?

*/*_Discharge of a centrifugal pump is?

*/*_The ratio of the normal force of jet of water on a plate inclined at an angle of 30¬¨‚àû as compared to that when the plate is normal to jet, is?

*/*_Ratio of inertia force to surface Jension is known as?

*/*_A flow whose streamline is represented by a curve, is called?

*/*_The horizontal component of buoyant force is?

*/*_If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have?

*/*_A hydraulic coupling belongs to the category of?

*/*_Pressure intensifier increases the pressure in proportion to?

*/*_A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will?

*/*_True one-dimensional flow occurs when?

*/*_The speed of sound in a ideal gas varies directly as it‚Äö√Ñ√¥s?

*/*_The velocity of the liquid flowing through the divergent portion of a Venturimeter?

*/*_The flow in which conditions do not change with time at any point, is known as?

*/*_According to equation of continuity,?

*/*_Principle of similitude forms the basis of?

*/*_The product of mass and acceleration of flowing liquid is called?

*/*_Which of the following instrument can be used for measuring speed of an aeroplane??

*/*_A large Reynold number is indication of?

*/*_The torque required to overcome viscous resistance of a footstep bearing is (where ≈í¬∫ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)?

*/*_A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called?

*/*_In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle '≈í‚àè'. Sensitivity of inclined tube to sensitivity of U-tube is equal to?

*/*_The property of a fluid which enables it to resist tensile stress is known as?

*/*_High specific speed of a pump implies it is?

*/*_The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m¬¨‚â§, and V = Velocity of jet in m/s)?

*/*_The units of dynamic or absolute viscosity are?

*/*_One liter of water occupies a volume of?

/_The total pressure on an immersed surface inclined at an angle ≈í‚àè with the liquid surface is?

/_A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a?

/_Bernoulli's equation is applied to?

/_Medium specific speed of turbine implies it is?

/_Fluid is a substance which offers no resistance to change of?

/_The optimum value of vane exit angle for a centrifugal pump impeller is?

/_The tangential velocity of the water element having a free vortex is?

/_An ideal flow of any fluid must satisfy?

/_If the surface of liquid is convex, men?

/_Working principle of dead weight pressure gauge tester is based on?

/_The divergent portion of a Venturimeter is made longer than convergent portion in order to?

/_The total head of a liquid particle in motion is equal to?

/_Euler's equation in the differential form for the motion of liquids is given by?

/_General energy equation holds for?

/_For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred?

/_One poise is equal to?

/_The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the?

/_The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)?

/_Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be?

/_The most efficient section of a channel is?

/_The efficiency of a Pelton wheel working under constant head ________ with the increase in power.?

/_A hydraulic accumulator normally consists of?

/_The specific speed of a turbine is given by the equation?

/_A flow through an expanding tube at constant rate is called?

/_Discharge of a centrifugal pump is?

/_The ratio of the normal force of jet of water on a plate inclined at an angle of 30¬¨‚àû as compared to that when the plate is normal to jet, is?

/_Ratio of inertia force to surface Jension is known as?

/_A flow whose streamline is represented by a curve, is called?

/_The horizontal component of buoyant force is?

/_If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have?

/_A hydraulic coupling belongs to the category of?

/_Pressure intensifier increases the pressure in proportion to?

/_A metal with specific gravity of 'a' floating in a fluid of same specific gravity 'a' will?

/_True one-dimensional flow occurs when?

/_The speed of sound in a ideal gas varies directly as it‚Äö√Ñ√¥s?

/_The velocity of the liquid flowing through the divergent portion of a Venturimeter?

/_The flow in which conditions do not change with time at any point, is known as?

/_According to equation of continuity,?

/_Principle of similitude forms the basis of?

/_The product of mass and acceleration of flowing liquid is called?

/_Which of the following instrument can be used for measuring speed of an aeroplane??

/_A large Reynold number is indication of?

/_The torque required to overcome viscous resistance of a footstep bearing is (where ≈í¬∫ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)?

/_A flow in which each liquid particle has a definite path, and the paths of individual particles do not cross each other, is called?

/_In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle '≈í‚àè'. Sensitivity of inclined tube to sensitivity of U-tube is equal to?

/_The property of a fluid which enables it to resist tensile stress is known as?

/_High specific speed of a pump implies it is?

/_The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Cross-sectional area of jet in m¬¨‚â§, and V = Velocity of jet in m/s)?

/_The units of dynamic or absolute viscosity are?

/_One liter of water occupies a volume of?