A. smoky chimney exit
B. excess air in flue gases
C. measuring carbon mono-oxide in flue gases
D. measuring temperature of flue gases at exit of furnace
E. measuring oxygen in flue gases
Related Mcqs:
- For combustion of a fuel, following is essential_____________________?
A. correct fuel air ratio
B. proper ignition temperature
C. 02 to support combustion
D. all the three above
E. none of the above - The three “Ts” for good combustion are____________________?
A. temperature, time, and turbulance
B. total air, true fuel, and turbulance
C. thorough mixing, total air, and temperature
D. total air, time, and temperature
E. none of the above - Spontaneous combustion is a phenomenon in which____________________?
A. all the fuel burns instantaneously producing high energy release
B. fuel burns with less air
C. coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal
D. explosion in furnace
E. none of the above - Coke is produced by__________________?
A. pulverising coal in inert atmosphere
B. heating wood in a limited supply of air at temperatures below 300GC
C. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
D. binding the pulverised coal into brick-etts
E. enriching carbon in the coal - A wet vapour can be completely specified by__________________?
A. pressure only
B. temperature only
C. dryness fraction only
D. specific volume only
E. pressure and dryness fraction - The height of chimney in a power plant is governed by__________________?
A. the draft to be created
B. limitation of construction facilities
C. control of pollution
D. quantity of flue gases to be handled
E. all of the above - In open combustion chamber in diesel engines____________________?
A. the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on fuel mixture
B. fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
C. only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge
D. fuel is injected at atmospheric pres¬sure
E. there are no valves. - The basic requirement of a good combustion chamber is___________________?
A. high compression ratio
B. low compression ratio
C. low volumetric efficiency
D. minimum turbulence
E. high power output and high thermal efficiency - Power impulses from an I.C. engine are somoothed out by__________________?
A. governor
B. crank shaft
C. gear box
D. flywheel
E. timing spark properly - Flow of water in a pipe about 3 metres in diameter can be measured by__________________?
A. orifice plate
B. venturi
C. rotameter
D. pitot tube
E. nozzle
