Home
Current Affairs January 2024

What is the correct answer?

4

The mass per unit volume of a liquid at a standard temperature and pressure is called

A. Specific weight

B. Mass density

C. Specific gravity

D. None of these

Correct Answer :

B. Mass density


Related Questions

What is the correct answer?

4

The pressure of air __________ with the increase of height from the surface of the earth.

A. Does not change

B. Decreases

C. Increases

D. None of these

What is the correct answer?

4

Free surface of a liquid tends to contract to the smallest possible area due to force of

A. Surface tension

B. Viscosity

C. Friction

D. Cohesion

What is the correct answer?

4

The product of mass and acceleration of flowing liquid is called

A. Inertia force

B. Viscous force

C. Gravity force

D. Pressure force

What is the correct answer?

4

A differential manometer is used to measure

A. Atmospheric pressure

B. Pressure in pipes and channels

C. Pressure in Venturimeter

D. Difference of pressures between two points in a pipe

What is the correct answer?

4

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2where m is equal to

A. 0.405 + (0.003/H)

B. 0.003 + (0.405/H)

C. 0.405 + (H/0.003)

D. 0.003 + (H/0.405)

What is the correct answer?

4

A fluid is said to be ideal, if it is

A. Incompressible

B. Viscous and incompressible

C. Inviscous and compressible

D. Inviscous and incompressible

What is the correct answer?

4

The angle of contact in case of a liquid depends upon

A. The nature of the liquid and the solid

B. The material which exists above the free surface of the liquid

C. Both of die above

D. Any one of the above

What is the correct answer?

4

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 minimise frictional losses

C. Both (A) and (B)

D. None of these

What is the correct answer?

4

According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A. A × M × m1/2 × i2/3

B. A × M × m2/3 × i1/2

C. A1/2 × M2/3 × m × i

D. A2/3 × M1/3 × m × i

What is the correct answer?

4

If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm, the pressure at a depth of 50 m below the oil surface will be

A. 2 meters of water column

B. 3 meters of water column

C. 5 meters of water column

D. 6 meters of water Column

What is the correct answer?

4

A uniform body 3 m long, 2 m wide and 1 m deep floats in water. If the depth of immersion is 0.6 m, then the weight of the body is

A. 3.53 kN

B. 33.3 kN

C. 35.3 kN

D. None of these

What is the correct answer?

4

Non uniform 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. Velocity, depth, pressure, etc. change from point to point in the fluid flow.

D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

What is the correct answer?

4

The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

A. v²/2g

B. 0.5v²/2g

C. 0.375v²/2g

D. 0.75v²/2g

What is the correct answer?

4

In a static fluid

A. Resistance to shear stress is small

B. Fluid pressure is zero

C. Linear deformation is small

D. Only normal stresses can exist

What is the correct answer?

4

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

What is the correct answer?

4

The resultant of all normal pressures acts

A. At C.G. of body

B. At center of pressure

C. Vertically upwards

D. At metacentre

What is the correct answer?

4

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

What is the correct answer?

4

The water pressure per metre length on a vertical masonry wall of dam is (where w = Specific weight of the liquid, and H = Height of the liquid)

A. wH/2

B. wH

C. wH2/2

D. wH2/4

What is the correct answer?

4

In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

A. p/sinα

B. 2p/sinα

C. p/2sinα

D. 2p/sin (α/2)

What is the correct answer?

4

When a body is placed over a liquid, it will sink down if

A. Gravitational force is equal to the up-thrust of the liquid

B. Gravitational force is less than the up-thrust of the liquid

C. Gravitational force is more than the up-thrust of the liquid

D. None of the above

What is the correct answer?

4

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

What is the correct answer?

4

A flow is called super-sonic if the

A. Velocity of flow is very high

B. Discharge is difficult to measure

C. Mach number is between 1 and 6

D. None of these

What is the correct answer?

4

The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe)

A. v²/2g

B. 0.5v²/2g

C. 0.375v²/2g

D. 0.75v²/2g

What is the correct answer?

4

Mercury does not wet glass. This is due to property of liquid known as

A. Adhesion

B. Cohesion

C. Surface tension

D. Viscosity

What is the correct answer?

4

The centre of gravity of the volume of the liquid displaced by an immersed body is called

A. Centre of gravity

B. Centre of pressure

C. Metacentre

D. Centre of buoyancy

What is the correct answer?

4

The most efficient section of a channel is

A. Triangular

B. Rectangular

C. Square

D. Trapezoidal

What is the correct answer?

4

For hypersonic flow, the Mach number is

A. Unity

B. Greater than unity

C. Greater than 2

D. Greater than 4

What is the correct answer?

4

The kinematic viscosity of an oil (in stokes) whose specific gravity is 0.95 and viscosity 0.011 poise, is

A. 0.0116 stoke

B. 0.116 stoke

C. 0.0611 stoke

D. 0.611 stoke

What is the correct answer?

4

A channel is said to be of most economical cross-section, if

A. It gives maximum discharge for a given cross-sectional area and bed slope

B. It has minimum wetted perimeter

C. It involves lesser excavation for the designed amount of discharge

D. All of the above

What is the correct answer?

4

A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

A. Incompressible

B. Compressible

C. Viscous

D. None of these