C:-21%
D:-0%
Correct Answer:- Option-A
Question85:-Which of the following is not true of steam 7
A:-Highest specific heat and latent heat
B:-Low heat transfer coefficient
C:-Easy to control and distribute
D:-Cheap and inert
Correct Answer:- Option-B
Question86:-The draught produced by the chimney is due to the
A:-Density difference between the column of hot gases inside the chimney and the cold air outside
B:-Pressure difference between the column of hot gases inside the chimney and the cold air outside
C:-Velocity difference between the column of hot gases inside the chimney and the cold air outside
D:-All of the above
Correct Answer:- Option-A
Question87:-The efficiency of the chimney is directly proportional to the
A:-Height of the chimney
B:-Bottom area of the chimney
C:-Top area of the chimney
D:-None of the above
Correct Answer:- Option-A
೧6580788: -77 theoretical available draught at about percentage of total static draught calculated.
A:-20
B:-40
C:-60
D:-80
Correct Answer:- Option-D
Question89:-The function of a chimney in forced draught is
A:-To produce draught
B:-To discharge gases high in to the atmosphere
C:-To make draught and discharge gases to atmosphere
D:-None of the above
Correct Answer:- Option-B
Question90:-Induced draught is used when
A:-An economiser is used
B:-An air preheater is used
C:-An economiser and air preheater are used
D:-None of the above
Correct Answer:- Option-C
Question91:-Which is not true in the case of a steam jet draught 7
A:-It occupies minimum space
B:-It can't be started until high pressure steam is available
C:-Many classes of low grade fuels can be used
D:-Maintenance cost is very high
Correct Answer:- Option-D
Question92:-The efficiency of artificial draught is nearly
A%
B:-15%
C:-25%
D:-30%
Correct Answer:- Option-A
Question93:-The efficiency of the chimney draught is hardly
A%
8:-5%
C:-3%
D:-1%
Correct Answer:- Option-D
Question94:-The fuel buming capacity of the grate mechanical draught in comparison with natural draught is
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