Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C.

A

50

B

70

C

90

D

140

If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.

A

Premix

B

Outside mixing type

C

Rotary

D

Diffusion

Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners?

A

PCM

B

Tar

C

Light diesel oil

D

Low viscosity furnace oil

Bunsen burner is an example of a/an __________ burner.

A

inside mixing/premix type

B

submerged combustion

C

rotary cup

D

outside mixing/diffusion flame/nozzle mix type

The length of each side of square A is increased by 100 percent to make square B. Again the length of each side of square B is increased by 50 percent to make square C. By what percent is the area of square C greater than the sum of the areas of square A and B?

A

75%

B

80%

C

85%

D

90%

The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

A

$$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{2{\text{g}}}}$$

B

$$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{\text{g}}}$$

C

$$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{2{\text{g}}}}$$

D

$$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$

A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is ________ of the jet velocity

A

One-half

B

One-third

C

Two-third

D

Three-fourth

Atomising steam to fuel oil ratio in a burner should be around

A

0.5

B

1.5

C

2.5

D

3.5

A small square region inside a larger square is shaded. The diagonal of the larger square is three times the diagonal of the small square in length. What fraction of the area of the larger square is not shaded?

A

1/9

B

1/3

C

2/3

D

8/9

The length of each of square A is increased by 100 percent to make square B.Again the length of the each side of square B is increased by 50 peacent to make square C.By of the area df square A and B?

A

75%

B

80%

C

85%

D

90%

Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

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