In case of coutte flow, the fluid flow is between two large flat parallel plates with

In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, $$l$$ = Span of the spring, n = Number of plates, b = Width of plates and t = Thickness of plates)

A

$$\frac{{{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

B

$$\frac{{3{\text{W}}l}}{{2{\text{nb}}{{\text{t}}^2}}}$$

C

$$\frac{{2{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

D

$$\frac{{3{\text{W}}l}}{{{\text{nb}}{{\text{t}}^2}}}$$

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

In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

A

Equal to

B

More than

C

Less than

D

Either more or less than (depending upon the fluid)

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

A

constant over the cross section

B

parabolic distribution across the section

C

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

D

zero at plates and increases linearly to midpoint

The ratio of maximum to average velocity in case of streamline flow between parallel plates is

A

1

B

1.5

C

2

D

2.5

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

A

Higher than the surface of liquid

B

The same as the surface of liquid

C

Lower than the surface of liquid

D

Unpredictable

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as ________ double cover butt joint.

A

Single riveted

B

Double riveted

C

Multi riveted

D

None of these

When two plates are butt together and riveted with cover plates with two rows of rivets, the joint is known as

A

Lap joint

B

Butt joint

C

Single riveted single cover butt joint

D

Double riveted double cover butt joint

When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.

A

Single riveted

B

Double riveted

C

Both (A) and (B)

D

None of these

Velocity distribution for flow between two fixed parallel plates

A

Varies parabolically across the section

B

Is constant over the entire cross-section

C

Is zero at the plates and increases linearly to the midplane

D

None of these

In case of coutte flow, the fluid flow is between two large flat parallel plates with

Related Questions