The normal stress in a fluid will be constant in all directions at a point only if

The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress.

A

Working

B

Damaging

C

Allowable

D

None of these

The normal stress is the same in all directions at a point in a fluid, only when the fluid

A

Is at rest & has zero viscosity

B

Is frictionless

C

Fluid layer has no motion relative to an adjacent layer of fluid

D

Is incompressible & frictionless

The normal stress is the same in all directions at a point in a fluid, when the fluid is

A

Non-viscous

B

Incompressible

C

Both A and B

D

Having no motion of one fluid layer relative to the other

The normal stress is same in all directions at a point in a fluid

A

Only when the fluid is frictionless

B

Only when the fluid is incompressible and has zero viscosity

C

When there is no motion of one fluid layer relative to an adjacent layer

D

Irrespective of the motion of one fluid layer relative to an adjacent layer

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

The pressure at a point in a fluid will not be same in all the directions when the fluid is

A

Moving

B

Viscous

C

Viscous and static

D

Viscous and moving

The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and

A

Moving

B

Static

C

Cold

D

Hot

Point A is 10 miles West of Point B. Point b is 30 miles North of pint C. Point C is 20 miles East of Point D. What is the distance (in miles) between Point A and Point D?

A

1010

B

1020

C

2010

D

3010

Point A is 10 km west of point B. Point B is 30 km north of point C. Point C is 20 km east of point D. What is the distance between point A and D?

A

1020Km

B

1010Km

C

2010Km

D

3010Km

According to maximum normal stress theory, the maximum normal stress in the shaft is

A

$$\frac{1}{2}\sqrt {{\sigma ^2} \times 4{\tau ^2}} $$

B

$$\sqrt {{\sigma ^2} \times 4{\tau ^2}} $$

C

$$\frac{1}{2}\left( {\sigma + \sqrt {{\sigma ^2} \times 4{\tau ^2}} } \right)$$

D

$$\sigma + \sqrt {{\sigma ^2} \times 4{\tau ^2}} $$

The normal stress in a fluid will be constant in all directions at a point only if

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