⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs331
Water tube boilers are those in which________________?
Aflue gases pass through tubes and water around it
Bwater passes through the tubes and flue gases around it
Cwork is done during adiabatic expansion
Dchange in enthalpy E. none of the above
332
Steam engine operates on_________________?
Acarnot cycle
Bjoule cycle
CStirling cycle
Dbrayton cycle E. none of the above
333
The lenght of Cornish boiler is of the order of _________________?
A2-4 m
B3-5 m
C5-7.5 m
D7-9 m E. 9-11 m
334
For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is___________________?
A1 kg
B4/3kg
C8/3kg
D2 kg E. 16/3 kg
335
Which of the following gases has the highest calorific value ________________?
Aproducer gas
Bcoal gas
Cwater gas
Dblast furnace gas E. coke oven gas
336
Efficiency of a thermal cycle increases by ________________?
Aand
BD. cooling of steam E. none of the above
Cboth
337
Efficiency of rankine cycle can be increased by_________________?
Adecreasing initial steam pressure and temperature
Bincreasing exhaust pressure
Cdecreasing exhaust pressure
Dincreasing the expansion ratio E. increasing number of regenerative heaters
338
Alkaline pyrogallate is used in Orsat’s apparatus for absorption of _________________?
AC02
BCO
C02
DN2 E. none of the above
339
The diameter of internal flue tubes in a Lancashire boiler compared to its shell is_________________?
Aone-half
Bone-third
Cone-fourth
Done-fifth E. two-fifth
340
Which of the following is steam dbal?
Anon-coking bituminous coal
Bbrown coal
Cpulverised coal
Dcoking bituminous coal E. none of the above