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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

All Topics  1919

In natural circulation type boiler _______________?
A heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B water is supplied in durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam
C feed pump is employed to supplement natural circulation in water wall type furnace
D water is converted into steam in one . pass without any recirculation
Correct Answer: heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
Which of the following is steam dbal?
A non-coking bituminous coal
B brown coal
C pulverised coal
D coking bituminous coal
Correct Answer: non-coking bituminous coal
The diameter of cylindrical shell of the Lancashire boiler is of the order of__________________?
A 1 tp 1.25m
B 1 to 1.75 m
C 2 to 4 m
D 1.75 to 2.75 m
Correct Answer: 1.75 to 2.75 m
Which of the following is a fire tube boiler________________?
A locomotive boiler
B Babcock and Wilcox boiler
C Stirling boiler.
D all of the above
Correct Answer: locomotive boiler
Which of the following substance will have same percentage in both proximate and ultimate analysis___________________?
A ash
B volatile matter
C moisture
D hydrogen
Correct Answer: ash
Water tube boilers are those in which________________?
A flue gases pass through tubes and water around it
B water passes through the tubes and flue gases around it
C work is done during adiabatic expansion
D change in enthalpy
Correct Answer: work is done during adiabatic expansion
Steam engine operates on_________________?
A carnot cycle
B joule cycle
C Stirling cycle
D brayton cycle
Correct Answer: brayton cycle
The lenght of Cornish boiler is of the order of _________________?
A 2-4 m
B 3-5 m
C 5-7.5 m
D 7-9 m
Correct Answer: 5-7.5 m
For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is___________________?
A 1 kg
B 4/3kg
C 8/3kg
D 2 kg
Correct Answer: 4/3kg
Which of the following gases has the highest calorific value ________________?
A producer gas
B coal gas
C water gas
D blast furnace gas
Correct Answer: coal gas
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