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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

The pressure and temperature at the end of compression stroke in a petrol engine are of the order of___________________?
A 4 – 6 kg/cm2 and 200 – 250°C
B 6 – 12 kg/cm2 and 250 – 350°C
C 12 – 20 kg/cm2 and 350 – 450°C
D 20 – 30 kg/cm2 and 450 – 500°C
Correct Answer: 6 – 12 kg/cm2 and 250 – 350°C
In case of gas turbines, the gaseous fuel consumption guarantees are based on________________?
A high heat value
B low heat value
C net calorific value
D middle heat value
Correct Answer: low heat value
Fuel oil consumption guarantees for I .C. engine are usually based on__________________?
A low heat value of oil
B high heat value of oil
C net calorific value of oil
D calorific value of fuel
Correct Answer: high heat value of oil
All heat engines utilize_____________________?
A low heat value of oil
B high heat value of oil
C net claorific value of oil
D calorific value of fuel
Correct Answer: low heat value of oil
The calorific value of gaseous fuels is expressed in terms of__________________?
A kcal
B kcal/kg
C kcal/m2
D kcal/m²
Correct Answer: kcal
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
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