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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

Cochran boiler is a__________________?
A horizontal fire-tube boiler
B horizontal water-tube boiler
C veritcal water-tube boiler
D vertical fire tube boiler
Correct Answer: vertical fire tube boiler
Orsat meter is used for__________________?
A gravimetric analysis of the flue gases
B volumetric analysis of the flue gases
C mass flow of the flue gases
D measuring smoke density of flue gases
Correct Answer: volumetric analysis of the flue gases
An ideal regenerative cycle is ______________________?
A equal to carnot cycle
B less than carnot cycle
C more than carnot cycle
D could be anything
Correct Answer: less than carnot cycle
Lancashire ‘boiler is a__________________?
A stationary fire tube boiler
B stationary water tube boiler
C water tube boiler with natural/forced circulation
D mobile fire tube boiler
Correct Answer: stationary fire tube boiler
One kilowatt-hour energy is equivalent to ________________?
A 1000 J
B 360 kJ
C 3600 kJ
D 3600 kW/sec
Correct Answer: 3600 kJ
100% efficiency of a thermal cycle cannot be achieved because of __________________?
A frictional losses
B it is not possible to achieve 0°K temperature
C leakage
D non-availability of ideal substance
Correct Answer: it is not possible to achieve 0°K temperature
The diameter of fire tube of Cornish boiler compared to its shell is__________________?
A one half
B one third
C one-fifth
D two-fifth
Correct Answer: one half
The change in internal energy in steam engines equals to__________________?
A work done during the rankine cycle ;
B work done during compression.
C work done during adiabatic expansion
D change in enthalpy
Correct Answer: work done during the rankine cycle ;
Locomotive type’ boiler is__________________?
A horizontal multitubular water tube boiler
B water wall enclosed furnace type
C vertical tubular fire tube type
D horizontal multi-tubular fire tube type
Correct Answer: horizontal multi-tubular fire tube type
Fire 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 forced circulation takes place
D tubes are laid vertically
Correct Answer: flue gases pass through tubes and water around it
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