Main gas valve in a gaseous fuel burner is a __________ valve.

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

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

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

A

400-500

B

900-1000

C

1400-1500

D

1700-1800

Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.

A

[

A.

B.

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

A

Output & fineness

B

Velocity

C

Both A & B

D

None of these

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

A

0.5

B

1.5

C

2.5

D

3.5

In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous

A

Uranium oxide

B

Uranium hexaflouride

C

Uranium carbide

D

Uranium sulphate

In case of gas turbines, the gaseous fuel consumption guarantees are based on

A

High heat value

B

Low heat value

C

Net calorific value

D

Calorific value

The main function of primary air in pulverised coal fired burner is to

A

Burn CO to CO₂

B

Dry and transport the coal

C

Have proper combustion by supplying it around the burner

D

Preheat the tertiary air used for complete combustion of CO to CO₂

Turndown ratio of a gas burner is equal to the

A

Maximum to minimum heat input ratio

B

Maximum to minimum permissible gas flow rate

C

Both A & B

D

Minimum to maximum heat input ratio

Main gas valve in a gaseous fuel burner is a __________ valve.

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