A neutral flame is obtained by supplying

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

A

Balanced beam

B

Under reinforced beam

C

Over reinforced beam

D

None of the above

In a D.C. generator the magnetic neutral axis coincides with the geometrical neutral axis, when

A

There is no load on the generator

B

The generator runs on full load

C

The generator runs on overload

D

The generator runs on designed speed

In case of an under-reinforced beam, the depth of actual neutral axis is __________ that of the critical neutral axis.

A

Same as

B

Less than

C

Greater than

D

None of these

The temperature of the inner luminous cone of neutral flame is about

A

1000°C

B

1250°C

C

2100°C

D

3200°C

Actual flame temperature is always lower than the adiabatic flame temperature, because there is

A

No possibility of obtaining complete combustion at high temperature

B

Always loss of heat from the flame

C

Both A & B

D

Neither A nor B

The maximum adiabatic flame temperature in air is __________ the maximum flame temperature in pure oxygen.

A

Lower than

B

Higher than

C

Same as

D

Not related to

The maximum adiabatic flame temperature of fuels in air is __________ the maximum flame temperature in pure oxygen.

A

Lower than

B

Higher than

C

Same as

D

Not related to

An hmh flame speed is obtained in diesel engine when air fuel ratio is

A

Uniform throughout the mixture

B

Chemically correct mixture

C

About 35% of rich mixture

D

About 10% of rich mixture

When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.

A

Neutral

B

Oxidizing

C

Carburizing

D

None of these

The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

A

10

B

8

C

12

D

15

A neutral flame is obtained by supplying

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