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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

Boiler stays are used to___________________?
A prevent flat surfaces under pressure from tearing apart
B take care of failure in shear
C take care of failure in compression
D provide support for boiler
Correct Answer: prevent flat surfaces under pressure from tearing apart
It is required to produce large amount of steam at low pressure. Which boiler should be used ?
A pulverised fuel fired boiler
B cochran boiler
C lancashire boiler
D babcock and wilcox boiler
Correct Answer: lancashire boiler
Steam in water tube boiler as compared to fire tube boiler_________________?
A can be raised rapidly
B is raisd at slower rate
C is raised at same rate
D could be raised at fast/slow rate depending on design
Correct Answer: can be raised rapidly
In accelerated circulation type boiler________________?
A heating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm
B water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam
C feed pump is employed to supplement natural circulation in water wall type furnace
D
Correct Answer: water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam
In forced recirculation 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 drum and through down-comers located in atmospheric condition 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: feed pump is employed to supplement natural circulation in water wall type furnace
Atmospheric pressure is equal to____________?
A 1.013 bar
B 760mm of Hg
C 101.3KN/m2
D All of these
Correct Answer: All of these
Which of the following variables controls the physical properties of a perfect gas_________________?
A pressure
B temperature
C volume
D all of the above
Correct Answer: all of the above
The unit of time in S.I. units is__________________?
A second
B minute
C hour
D day
Correct Answer: second
Which of the following laws is applicable for the behavior of a perfect gas__________________?
A Boyle’s law
B Charles’law
C Gay-Lussac law
D all of the above
Correct Answer: all of the above
The unit of temperature in S.I. units is _________________?
A Centigrade
B Celsius
C Fahrenheit
D Kelvin
Correct Answer: Kelvin
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