Related Questions

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
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
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
Main gas valve in a gaseous fuel burner is a __________ valve.
A Gate
B Butterfly
C Globe
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
Turn down ratio of a burner
A Should be as low as possible i.e., 1 : 2
B Should be 1:1 for a batch type furnace.
C Is the ratio of maximum to minimum permissible heat input rates
D Is normally much more for a continuous furnace as compared to a batch furnace
দুটি এক-পরমাণুক আদর্শ গ্যাস পরস্পরের সাথে তাপীয় সাম্যাবস্থায় আছে। A গ্যাস m ভরের অণু দ্বারা গঠিত, এবং B গ্যাস 4m ভরের অণু দ্বারা গঠিত। A গ্যাসের আয়তন ৪ গ্যাসের আয়তনের দ্বিগুণ। এদের চাপের অনুপাত PA / PB কত? (Two monoatomic ideal gases are in thermal equilibrium with each other. Gas A is composed of molecules with mass m while gas B is composed of molecules with mass 4m. The volume of gas A is twice that of gas B. What it the ratio of their pressures PA / PB ?)
A 1/4
B 1/2
C 1
D 2
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
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ °C.
A 50
B 70
C 90
D 140
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

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