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Q1. | Two pieces of metal when immersed in a liquid have equal upthrust on them, then |

A. | Both pieces must have equal weig.hts [Wrong Answer] |

B. | Both pieces must have equal densities [Wrong Answer] |

C. | Both pieces must have equal volumes [Correct Answer] |

D. | Both are floating to the same depth [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ A wooden piece floats half submerged in a tub of water. If the system is transferred to a lift ascending, with acceleration the wooden piece will

Sink a little more

Rise a little

Remain half submerged

Will sink to the bottom

⇒ If in a satellite orbiting the earth, a cork is immersed in a jar of water and released, it will

Rise

Sink

Remain where left

None of the above

⇒ A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be

1 m

10m

100m

none of the above

⇒ In which of the following the friction drag is generally larger than pressure drag?

a circular disc or plate held normal to flow

a sphere

a cylinder

an airfoil

⇒ In case of an airfoil, the separation of flow occurs

at the extreme rear of body

at the extreme front of body

midway between rear and front of body

any where between rear and front of body depending upon Reynolds number

⇒ An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to

g/3

g/2

2g/3

g

⇒ The discharge over a broad crested weir is maximum when the depth of flow is.

H/3

H/2

2 H/5

2 H/3

⇒ For laminar flow in circular pipes, the Darcy's friction factor f is equal to.

16/Re

32/ Re

64/ Re

none of the above where R,, is Reynolds number.

⇒ The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is.

constant over the cross section

parabolic distribution across the section

zero at the mid plane and varies linearly with distance from mid plane

zero at plates and increases linearly to midpoint

⇒ The pressure drag depends upon

The boundary layer formation

The separation of boundary layer

The size of wake

Both (B) and (C) above

⇒ The force exerted by jet on vane is determined by

Energy conservation principle

Momentum principle

Continuity equation

None of the above

⇒ Which of the following velocity potentials satisfies continuity equation ?

x2y

x2-y2

cosx

x2 + y2

⇒ An aeroplane works on

Archimedes' principle

Pascal's law

Bernoulli's principle

Stoke's law

⇒ In steady flow of a fluid, the total accele ration of any fluid particle.

can be zero

is never zero

is always zero

is independent of coordinates

⇒ An ideal flow of any fluid must fulfil the following

Newton's law of viscosity

Newton's law of motion

Boundary Layer theory

Continuity equation

⇒ The wake

always occurs before a separation point

always occurs after a separation point

is a region of high pressure intensity

none of the above

⇒ Mach's number is square root of the ratio between inertia force and the

Viscous force

Pressure force

Elastic force

Surface tension force

⇒ Weir may also be used to measure

Velocity of flow

Pressure

Discharge in a river or channel

Kinetic energy

⇒ Two pipe systems are said to be equivalent when.

head loss and discharge are same in two systems

length of pipe and discharge are same in two systems

friction factor and length are same in two systems

length and diameter are same in two systems

⇒ Flow in a pipe is laminar if the Reynold's number is

Less than 2000

Between 2000 and 4000

Between 4000 and 6000

Equal to 10000

⇒ Size of a venturimeter is specified by.

pipe diameter

throat diameter

angle of diverging section

both pipe diameter as well as throat diameter

⇒ A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be.

less than 1 m/sec

1 m/sec

1.5 m/sec

2 m/sec

⇒ Magnus effect is very near to the

Magnetic field

Electric field

Bernoulli's theorem

Magnetic effect of current

⇒ In a forced vortex motion, the velocity of flow is.

directly proportional to its radial distance from axis of rotation

inversely proportional to its radial distance from the axis of rotation

inversely proportional to the square of its radial distance from the axis of rotation

directly proportional to the square of its radial distance from the axis of rotation

⇒ Hydraulic turbines are the machine which convert water energy into

Mechanical energy

Electrical energy

Solar energy

Automatic energy

⇒ When the flow in open channel is gradually varied, the flow is said to be

Steady uniform flow

Steady non-uniform flow

Unsteady uniform flow

Unsteady non-uniform flow

⇒ Metacentric height for small values of angle of heel is the distance between the.

centre of gravity and centre of buoy-ancy

centre of gravity and metacentre

centre of buoyancy and metacentre

free surface and centre of buoyancy

⇒ The point at which the resultant pressure on an immersed surface acts is known as

Centre of gravity

Centre of depth

Centre of pressure

Centre of immersed surface

⇒ Stream lines and path lines always coincide in case of

steady flow

laminar flow

uniform flow

turbulent flow

⇒ If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be

from reservoir A to reservoirs B and C

from reservoir B to reservoirs C and A

from reservoir C to reservoirs A and B

unpredictable