Related Questions

In Oxyacetylene gas welding, temperature at the inner cone of the flame is around
A 3500°C
B 3200°C
C 2900°C
D 2550°C
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the
A Incomplete combustion
B Complete combustion
C High oxygen in flue gas
D None of these
A sooty flame can be made non-luminous by
A Admitting more gas
B Shutting gas supply
C Admitting more air
D Shutting air supply
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
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
A neutral flame is obtained by supplying
A Equal volumes of oxygen and acetylene
B More volume of oxygen and less volume of acetylene
C More volume of acetylene and less volume of oxygen
D None of the above

Next steps