Home
Current Affairs January 2024

What is the correct answer?

4

The atmospheric pressure at sea level is

A. 103 kN/m2

B. 10.3 m of water

C. 760 mm of mercury

D. All of these

Correct Answer :

D. All of these


Related Questions

What is the correct answer?

4

A fluid which obeys the Newton's law of viscosity is termed as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

What is the correct answer?

4

When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

A. Gauge pressure

B. Absolute pressure

C. Positive gauge pressure

D. Vacuum pressure

What is the correct answer?

4

Surface tension has the units of

A. Newton-sec/m

B. Newton-m/sec

C. Newton/m

D. Newton

What is the correct answer?

4

The horizontal component of buoyant force is

A. Negligible

B. Same as buoyant force

C. Zero

D. None of the above

What is the correct answer?

4

The pressure intensity in kN/m2 (or kPa) at any point in a liquid is (where w = Specific weight of liquid, and h = Depth of liquid from the surface)

A. w

B. wh

C. w/h

D. h/w

What is the correct answer?

4

Euler's number is the ratio of __________ force to pressure force.

A. Inertia

B. Gravity

C. Viscous

D. None of these

What is the correct answer?

4

In order to measure the flow with a Venturimeter, it is installed in

A. Horizontal line

B. Inclined line with flow upwards

C. Inclined line with flow downwards

D. Any direction and in any location

What is the correct answer?

4

The ratio of the inertia force to the elastic force is called

A. Reynold's number

B. Froude's number

C. Weber's number

D. Mach number

What is the correct answer?

4

The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at (ω) rad/s about its vertical axis, is

A. π w ω² r²/4g

B. π w ω² r³/4g

C. π w ω² r⁴/4g

D. π w ω² r²/2g

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

The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

A. Effects

B. Does not effect

C. Both A and B

D. None of these

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

Manometer is used to measure

A. Pressure in pipes, channels etc.

B. Atmospheric pressure

C. Very low pressure

D. Difference of pressure between two points

What is the correct answer?

4

Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called

A. Adhesion

B. Cohesion

C. Viscosity

D. Compressibility

What is the correct answer?

4

The hydraulic mean depth for a circular pipe of diameter (d) is

A. d/6

B. d/4

C. d/2

D. d

What is the correct answer?

4

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?

A. Venturimeter

B. Orifice plate

C. Hot wire anemometer

D. Pitot tube

What is the correct answer?

4

Choose the wrong statement. Alcohol is used in manometer, because

A. Its vapour pressure is low

B. It provides suitable meniscus for the inclined tube

C. Its density is less

D. It provides longer length for a given pressure difference

What is the correct answer?

4

Kinematic viscosity is dependent upon

A. Pressure

B. Distance

C. Density

D. Flow

What is the correct answer?

4

Euler's dimensionless number relates the following

A. Inertial force and gravity

B. Viscous force and inertial force

C. Viscous force and buoyancy force

D. Pressure force and inertial force

What is the correct answer?

4

For measuring flow by a Venturimeter, if should be installed in

A. Vertical line

B. Horizontal line

C. Inclined line with flow downward

D. In any direction and in any location

What is the correct answer?

4

If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

A. Neutral equilibrium

B. Stable equilibrium

C. Unstable equilibrium

D. None of these

What is the correct answer?

4

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. 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 pleasure

What is the correct answer?

4

When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is

A. ω.r/2g

B. ω².r²/2g

C. ω.r/4g

D. ω².r²/4g

What is the correct answer?

4

According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

A. Equal to

B. Directly proportional

C. Inversely proportional

D. None of these

What is the correct answer?

4

In an isothermal atmosphere, the pressure

A. Decreases linearly with elevation

B. Remain constant

C. Varies in the same way as the density

D. Increases exponentially with elevation

What is the correct answer?

4

Rain drops are spherical because of

A. Viscosity

B. Air resistance

C. Surface tension forces

D. Atmospheric pressure

What is the correct answer?

4

The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

A. μπ²NR/60t

B. μπ²NR²/60t

C. μπ²NR³/60t

D. μπ²NR⁴/60t

What is the correct answer?

4

A pressure of 25 m of head of water is equal to

A. 25 kN/ m²

B. 245 kN/ m²

C. 2500 kN/m²

D. 2.5 kN/ m²

What is the correct answer?

4

The pressure of the liquid flowing through the divergent portion of a Venturimeter

A. Remains constant

B. Increases

C. Decreases

D. Depends upon mass of liquid

What is the correct answer?

4

The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

A. Equal to

B. Less than

C. More than

D. None of these