Related Questions

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
Colour imparted to the Bunsen flame by strontium salt is
A Bluish green
B Apple-green
C Brick red
D Crimson red
Main gas valve in a gaseous fuel burner is a __________ valve.
A Gate
B Butterfly
C Globe
D None of these
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C.
A 50
B 70
C 90
D 140
Turndown ratio of a burner gives an idea of the __________ in the furnace.
A Range of fuel firing rates
B Volume of the combustion chamber
C Maximum heat input rate only
D Minimum heat input rate only
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
A Its calorific value is very less
B Tar neutralises the residual acids present in pitch
C It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
D All of the above
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
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
Atomising steam to fuel oil ratio in a burner should be around
A 0.5
B 1.5
C 2.5
D 3.5

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