The unit of surface tension is

When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the

A

tension in the tight side of the belt

B

tension in the slack side of the belt

C

sum of the tensions on the tight side and slack side of the belt

D

average tension of the tight side and slack side of the belt

Unit of surface tension in S.I. unit is

A

Watt/m

B

Joule/m²

C

Newton/m²

D

Joule/m

The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

A

One-third

B

Two-third

C

Double

D

Three times

The tension on the slack side of the belt is __________ the tension on the tight side of the belt.

A

Equal to

B

Less than

C

Greater than

D

None of these

If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

A

$$\frac{{\text{g}}}{2}$$

B

$$\frac{{\text{g}}}{3}$$

C

$$\frac{{\text{g}}}{4}$$

D

None of these

The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than

A

18 bar diameters

B

24 bar diameters

C

30 bar diameters

D

36 bar diameters

If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is

A

$$\frac{{\text{g}}}{2}$$

B

$$\frac{{\text{g}}}{3}$$

C

$$\frac{{\text{g}}}{4}$$

D

$$\frac{{\text{g}}}{5}$$

Which one is the unit of surface tension of a liquid

A

Newton /m²

B

Electron volt /cm²

C

Joule/ mm

D

None of the above

Unit of surface tension is

A

Energy/unit area

B

Velocity/unit area

C

Both of the above

D

It has no units

The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

A

Emissivity

B

Transmissivity

C

Reflectivity

D

Intensity of radiation

The unit of surface tension is

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