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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

Compression ratio of LC. engines is ___________________?
A the ratio of volumes of air in cylinder before compression stroke and after compression stroke
B volume displaced by piston per stroke and clearance volume in cylinder
C ratio of pressure after compression and before compression
D swept volume/cylinder volume
Correct Answer: the ratio of volumes of air in cylinder before compression stroke and after compression stroke
Supercharging is the process of_____________________?
A supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
B providing forced cooling air
C injecting excess fuel for raising more load
D supplying compressed air to remove combustion products fully
Correct Answer: supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
The patrol is distilled at a temperature from :
A 6° to 20°
B 220° to 345°
C 65° to 220°
D 15° to 120°
Correct Answer: 65° to 220°
Which of the following is mostly used used as blast furnace fuel for extracting pig iron from iron ores?
A Brown coal
B Anthracite coal
C Hard coke
D Woodchar coal
Correct Answer: Hard coke
Which of the following solid fuel has high carbon content?
A Coke
B Coal
C Peat
D None of these
Correct Answer: Coke
Which of the following solid fuel has high caloric value : ___________?
A Wood
B Peat
C Bituminous coal
D Anthracite coal
Correct Answer: Anthracite coal
The average calorific value of wood is about : __________?
A 33500 kj/kg
B 25000 kj/kg
C 23000 kj/kg
D 19700 kj/kg
Correct Answer: 19700 kj/kg
The natural solid fuels are : ________?
A Wood
B Peat
C Lignite
D All of above
Correct Answer: All of above
Diesel Cycle is also known as : __________?
A Constant temperature cycle
B Constant Volume cycle
C Constant Pressure Cycle
D All of above
Correct Answer: Constant Pressure Cycle
Pick up false statement?
A For petrol and large gas engines, quantity governingds preferred
B In quantity governing, air fuel ratio is almost constant and quantity of charge is changed depending on load
C In hit and miss governing, fuel supply is completely cut off during one or more number of cycles
D In quality governing, quantity of fuel is varied to suit the load and total charge of air is varied
Correct Answer: In quality governing, quantity of fuel is varied to suit the load and total charge of air is varied

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