The component of acceleration resulting due to unsteady nature of flow is called __________ acceleration. (A) Normal (B) Local (C) Convective (D) Tangential

The component of acceleration resulting due to unsteady nature of flow
is called __________ acceleration.
(A) Normal
(B) Local
(C) Convective
(D) Tangential
by

1 Answer

Answer :

(B) Local
by

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Description : What causes convective acceleration in fluid flow? (A) Steep slope in flow (B) Unsteady nature of flow (C) Non-uniformity of flow (D) Turbulence in flow

Last Answer : (C) Non-uniformity of flow

Nature of fluid flow during the opening of a valve in a pipeline is (A) Laminar (B) Unsteady (C) Steady (D) Uniform

Description : Nature of fluid flow during the opening of a valve in a pipeline is (A) Laminar (B) Unsteady (C) Steady (D) Uniform

Last Answer : (B) Unsteady

Which component of the electric field intensity is always continuous at the boundary? a) Tangential b) Normal c) Horizontal d) Vertical

Description : Which component of the electric field intensity is always continuous at the boundary? a) Tangential b) Normal c) Horizontal d) Vertical

Last Answer : a) Tangential

Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone. (A) Laminar (B) Transition (C) Both 'a' & 'b' (D) Highly turbulent

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Littoral drift (A) Is the raised line of sand, parallel to the sea coast (B) Is the slow movement of surface water at sea caused by the wind (C) Is a current parallel to the shore, caused due to tangential component of the wind (D) Is a current perpendicular to the shore line caused due to wind

Description : Littoral drift (A) Is the raised line of sand, parallel to the sea coast (B) Is the slow movement of surface water at sea caused by the wind (C) Is a current parallel to the shore, caused due to tangential component of the wind (D) Is a current perpendicular to the shore line caused due to wind

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The flow of a liquid through tapering pipe at a constant rate is an example of __________ flow. (A) Steady uniform (B) Steady non uniform (C) Unsteady uniform

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Last Answer : (B) Steady non uniform

Gradually varied flow in open channel is a/an __________ flow. (A) Steady uniform (B) Steady non-uniform (C) Unsteady uniform (D) Unsteady non-uniform

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Last Answer : (B) Steady non-uniform

Water flow in the river during flood can be categorised as the __________ flow. (A) Unsteady uniform (B) Unsteady non-uniform (C) Steady uniform (D) Steady non-uniform

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An equipotential line is __________ to the velocity vector at every point. (A) Normal(B) Parallel(C) Tangential(D) None of these

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The hyperboloid shape also aids in accelerating the upward convective air flow, improving __________ efficiency. a. Heating b. Warming c. Cooling d. Cold

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Normal depth in open channel flow is the depth of flow corresponding to (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Uniform flow

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A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have a.angular velocity b.centripental acceleration c.tangential acceleration d.all of the above e.107 dynes

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Last Answer : c. tangential acceleration

A flywheel 200 cm in diameter is rotating at 100 rpm. A point one the rim of the flywheel will not have a.angular velocity b.centripetal acceleration c.tangential acceleration d.all of the above e.107 dynes

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A particle moving with uniform speed can possess : (a) radial acceleration (b) tangential acceleration © both radial and tangential accelerations (d) neither radial nor tangential acceleration

Description : A particle moving with uniform speed can possess :  (a) radial acceleration (b) tangential acceleration © both radial and tangential accelerations (d) neither radial nor tangential acceleration

Last Answer : Neither radial nor tangential... as if it move in a straight line.. but it possess radial acceleration if it moves in a uniform circular path

A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. (A) Steady (B) Streamline (C) Turbulent (D) Unsteady

Description : A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. (A) Steady (B) Streamline (C) Turbulent (D) Unsteady

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A flow through a long pipe at decreasing rate is called __________ uniform flow. (A) Steady (B) Unsteady (C) Both A and B (D) None of these

Description : A flow through a long pipe at decreasing rate is called __________ uniform flow. (A) Steady (B) Unsteady (C) Both A and B (D) None of these

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Surging basically implies A. Unsteady, periodic and reversed flow B. Forward motion of air at a speed above sonic velocity C. The surging action due to the blast of air produced in a compressor D. Forward movement of aircraft

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Last Answer : ANSWER : A

For a laminar flow of fluid in a circular tube, 'h1 ' is the convective heat transfer co-efficient at velocity 'V1 '. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is (A) 1.26 h1(B) 0.794 h1(C) 0.574 h1(D) 1.741 h1

Description : For a laminar flow of fluid in a circular tube, 'h1 ' is the convective heat transfer co-efficient at velocity 'V1 '. If the velocity is reduced by half and assuming the fluid properties are constant, the new convective heat transfer co-efficient is (A) 1.26 h1 (B) 0.794 h1 (C) 0.574 h1 (D) 1.741 h1

Last Answer : (B) 0.794 h1

In air, the tangential component of flux density is continuous at the boundary. State True/False. a) True b) False

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Last Answer : a) True

The tangential component of the magnetic field intensity is continuous at the boundary of separation of two media. State True/False. a) True b) False

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Last Answer : a) True

The tangential component of electric field intensity is always continuous at the interface. State True/False. a) True b) False

Description : The tangential component of electric field intensity is always continuous at the interface. State True/False. a) True b) False

Last Answer : a) True

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation (A) Pressure falls below the vapour pressure (B) Pressure becomes very high (C) Temperature becomes low (D) All 'a', 'b' & 'c'

Description : Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation (A) Pressure falls below the vapour pressure (B) Pressure becomes very high (C) Temperature becomes low (D) All 'a', 'b' & 'c'

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The law of conservation of mechanical energy is valid a.Irrespective of the nature of force field b.Only in gravitational field c.Only if the total work done by the particle in moving around in a closed trajectory is zero d.Only if the force is tangential to the trajectory e.None of the above

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Last Answer : c. Only if the total work done by the particle in moving around in a closed trajectory is zero

A streamline is a line in flow field, (A) That is traced by all the fluid particles passing through a given point (B) Along which a fluid particle travels (C) Such that at every point on it, the velocity is tangential to it (D) None of these

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Last Answer : (C) Such that at every point on it, the velocity is tangential to it

A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Description : A thin, flat & square plate measuring 2 m 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m2. The plate temperature will ... heat transfer co-efficient is __________ W/m2 °C. (A) 50 (B) 100 (C) 150 (D) 200

Last Answer : (B) 100

Unsteady state heat conduction occurs, when (A) Temperature distribution is independent of time (B) Temperature distribution is dependent on time (C) Heat flows in one direction only (D) Three dimensional heat flow is concerned

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Last Answer : (B) Temperature distribution is dependent on time

In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant? (A) Rotational (B) Unsteady (C) Turbulent (D) Non-uniform

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Unsteady uniform flow is represented by flow through a/an (A) Long pipe at constant rate (B) Long pipe at decreasing rate (C) Expanding tube at increasing rate (D) Expanding tube at constant rate

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For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by (A) ∂u/∂x = 0 (B) ∂(ρu)/∂x = 0 (C) (∂u/∂x) = - (∂ρ/∂t) (D) ∂ρ/∂t = 0

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Last Answer : (A) ∂u/∂x = 0

Mass velocity is independent of temperature & pressure, when the flow is (A) Unsteady through unchanged cross-section (B) Steady through changing cross-section (C) Steady and the cross-section is unchanged (D) Unsteady and the cross-section is changed

Description : Mass velocity is independent of temperature & pressure, when the flow is (A) Unsteady through unchanged cross-section (B) Steady through changing cross-section (C) Steady and the cross-section is unchanged (D) Unsteady and the cross-section is changed

Last Answer : (C) Steady and the cross-section is unchanged

The energy equation, E + (p/ρ) + (V 2 /2g) + gZ = constant (E = internal energy/mass), is applicable to (A) Perfect gases only (B) Isothermal flow of gases (C) Adiabatic unsteady flow of gases (D) All compressible fluids

Description : The energy equation, E + (p/ρ) + (V 2 /2g) + gZ = constant (E = internal energy/mass), is applicable to (A) Perfect gases only (B) Isothermal flow of gases (C) Adiabatic unsteady flow of gases (D) All compressible fluids

Last Answer : (D) All compressible fluids

One dimensional flow implies (A) Flow in a straight line (B) Steady uniform flow (C) Unsteady uniform flow (D) A flow which does not account for changes in transverse direction

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Last Answer : (D) A flow which does not account for changes in transverse direction

Unsteady non-uniform flow is represented by flow through a/an (A) Long pipe at constant rate (B) Long pipe at decreasing rate (C) Expanding tube at increasing rate (D) Expanding tube at constant rate

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Pick out the wrong statement. (A) Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces(B) A hydrometer used for the determination of specific gravities of liquidsworks on the principle of buoyant forces(C) In case of unsteady fluid flow, the velocity at any given point does notchange with time(D) Turbulent fluid flow is characterised by the rapid fluctuation ofinstantaneous pressure & velocity at a poin

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In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) Discharge of water by a centrifugal pump being run at a constant rpm (B) Water flow in the suction and discharge pipe of a reciprocating pump (C) Water discharge from a vertical vessel in which constant level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Description : In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) ... level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Last Answer : (B) Water flow in the suction and discharge pipe of a reciprocating pump

An example of unsteady non uniform flow is the flow of liquid under pressure through a (A) Tapering pipe at constant flow rate (B) Tapering pipe at either decreasing or increasing flow rate (C) Long pipeline of constant diameter (D) None of these

Description : An example of unsteady non uniform flow is the flow of liquid under pressure through a (A) Tapering pipe at constant flow rate (B) Tapering pipe at either decreasing or increasing flow rate (C) Long pipeline of constant diameter (D) None of these

Last Answer : (B) Tapering pipe at either decreasing or increasing flow rate

The hyperboloid shape also aids in accelerating the upward convective air flow, improving ________ efficiency. • Performance • Cooling • Heating • All of the above

Description : The hyperboloid shape also aids in accelerating the upward convective air flow, improving ________ efficiency. • Performance • Cooling • Heating • All of the above

Last Answer : cooling

Pulverised fuel fired furnaces employ __________ fuel firing. (A) Horizontal (B) Vertical (C) Tangential (D) All (A), (B) and (C)

Description : Pulverised fuel fired furnaces employ __________ fuel firing. (A) Horizontal (B) Vertical (C) Tangential (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The curve of metacentre for a floating body __________ the curve of buoyancy. (A) Is always below (B) Is the evolute of (C) Intersects at right angle (D) Is tangential to

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18. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow. A) Yes B) No

Description : 18. A flow through an expanding tube at increasing rate is called unsteady non-uniform flow. A) Yes B) No

Last Answer : A

A flow in which the quantity of liquid flowing per second is not constant, is called (A) Streamline flow (B) Turbulent flow (C) Steady flow (D) Unsteady flow

Description : A flow in which the quantity of liquid flowing per second is not constant, is called (A) Streamline flow (B) Turbulent flow (C) Steady flow (D) Unsteady flow

Last Answer : Answer: Option D

A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Description : A flow in which the viscosity of fluid is dominating over the inertia force is called (A) Steady flow (B) Unsteady flow (C) Laminar flow (D) Turbulent flow

Last Answer : Answer: Option C

A flow through a long pipe at constant rate is called (A) Steady uniform flow (B) Steady non-uniform flow (C) Unsteady uniform flow (D) Unsteady non-uniform flow

Description : A flow through a long pipe at constant rate is called (A) Steady uniform flow (B) Steady non-uniform flow (C) Unsteady uniform flow (D) Unsteady non-uniform flow

Last Answer : Answer: Option A

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

Description : 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

Last Answer : Answer: Option B

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number. (A) Condensation (B) Grashoff (C) Stanton (D) Brinkman

Description : A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the __________ number. (A) Condensation (B) Grashoff (C) Stanton (D) Brinkman

Last Answer : (D) Brinkman

Equilibrium of a chemical reaction as viewed by kinetics is a __________ state. (A) Dynamic steady (B) Static steady (C) Dynamic unsteady (D) None of these

Description : Equilibrium of a chemical reaction as viewed by kinetics is a __________ state. (A) Dynamic steady (B) Static steady (C) Dynamic unsteady (D) None of these

Last Answer : (A) Dynamic steady

Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process. (A) Equilibrium (B) Adiabatic (C) Steady (D) Unsteady

Description : Filling of gas from a high pressure cylinder into small bottles is an example of a/an __________ process. (A) Equilibrium (B) Adiabatic (C) Steady (D) Unsteady

Last Answer : (D) Unsteady

Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called (A) Cyclonic precipitation (B) Convective precipitation (C) Orographic precipitation (D) None of these

Description : Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called (A) Cyclonic precipitation (B) Convective precipitation (C) Orographic precipitation (D) None of these

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Precipitation caused by lifting of an air mass due to the pressure difference, is called (A) Cyclonic precipitation (B) Convective precipitation (C) Orographic precipitation (D) None of these

Description : Precipitation caused by lifting of an air mass due to the pressure difference, is called (A) Cyclonic precipitation (B) Convective precipitation (C) Orographic precipitation (D) None of these

Last Answer : Answer: Option A