Question56:-Which of the following 15 the best way to assess boiler losses 7
A:-Benchmarking evaporation ratio
B:-Indirect efficiency evaluation
C:-Direct efficiency evaluation
D:-None of the above
Correct Answer:- Option-B
Question57:-A boiler trial indicated 2% 02 at boiler exit and 7% 02 at stack. The in-leak air quanity between these two
measurement is
2:-25%
B:-50%
C:-40%
0-6
Correct Answer:- Option-C
Question58:-Enthalpy of evaporation of steam will be higher at
A2 kgl em™M2)
8:-8 धुन (2
C:-12 kgl em™(2)
0:-20 (0 दा (2)
Correct Answer:- Option-A
Question59:-The element that does not contribute to heating value during combustion process is
A:-Sulphur
B:-Hydrogen
C:-Carbon
D:-Nitrogen
Correct Answer:- Option-D
Question60:-Which of the following is not one of the 3 Ts of combustion 7
A:-Time
B:-Temperature
C:-Turbulence
D:-Tertiary
Correct Answer:- Option-D
Question61:-Which of the following is not required in the boiler efficiency evaluation by direct method 7
A:-Steam flow
B:-Fuel flow
C:-Oxygen % in the flue gas
D:-Feed water temperature
Correct Answer:- Option-C
Question62:-The dry saturated steam when throttled to a lower pressure will
A:-Become wet
B:-Become superheated
C:-Remain dry saturated
D:-Become condensate
Correct Answer:- Option-B
Question63:-Velocity of steam in च pipe does strongly depend on
A:-Number of bends and valves in the pipe
B:-Specific volume of steam
C:-Length of the pipe
D:-None of the above
Correct Answer:- Option-B
Question64:-Latent heat of steam at the critical point is
A:-Zero
B:-540 kCalkg
C:-Infinite
D:-Equal to sensible heat
Correct Answer:- Option-A
Question65:-Fumace oil contains 84% carbon by weight. How many kg of *CO_(2)" does complete combustion of 1 kg of
fumace oil generate 7
2:-2.4
B:-4