Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

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.

Gaseous-fuel guarantees are based on___________________?

A calorific value of oil

B low heat value of oil

C high heat value of oil

D mean heat value of oil

Review Detailed Answer

Correct Answer: low heat value of oil

A 75 cc engine has following parameter as 75 cc ___________________?

A fuel tank capacity

B lub oil capacity

C swept volume

D cylinder volume

Review Detailed Answer

Correct Answer: swept volume

Diesel fuel, compared to petrol is_________________?

A less difficult to ignite

B just about the same difficult to ignite

C more difficult to ignite

D highly ignitable

Review Detailed Answer

Correct Answer: more difficult to ignite

The air-fuel ratio of the petrol engine is controlled by__________________?

A fuel pump

B governor

C injector

D carburettor

Review Detailed Answer

Correct Answer: carburettor

The accunmulation of carbon in a cylinder results in increase of________________?

A clearance volume

B volumetric efficiency

C ignition time

D effective compression ratio

Review Detailed Answer

Correct Answer: effective compression ratio

In a typical medium speed 4-stroke cycle diesel engine________________?

A compression starts at 35° after bottom dead center and ends at top dead center

B compression starts at bottom dead center and ends at top dead center

C compression starts at 10° before bottom dead center and, ends just before top dead center

D may start and end anywhere

Review Detailed Answer

Correct Answer: compression starts at 35° after bottom dead center and ends at top dead center

The air requirement of a petrol engine during starting compared to theoretical airequired for complete combustion is___________________?

A more

B loss

C same

D may be more or less depending on engine capacity

Review Detailed Answer

Correct Answer: loss

The specific fuel consumption per BHP hour for diesel engine is approximately___________________?

A 0.15 kg

B 0.2 kg

C 0.25 kg

D 0.3 kg

Review Detailed Answer

Correct Answer: 0.2 kg

The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed____________________?

A 80°C

B 120°C

C 180°C

D 240°C

Review Detailed Answer

Correct Answer: 80°C

Combustion in compression ignition engines is____________________?

A homogeneous

B heterogeneous

C both A. and B.

D laminar

Review Detailed Answer

Correct Answer: heterogeneous

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Gaseous-fuel guarantees are based on___________________?

A 75 cc engine has following parameter as 75 cc ___________________?

Diesel fuel, compared to petrol is_________________?

The air-fuel ratio of the petrol engine is controlled by__________________?

The accunmulation of carbon in a cylinder results in increase of________________?

In a typical medium speed 4-stroke cycle diesel engine________________?

The air requirement of a petrol engine during starting compared to theoretical airequired for complete combustion is___________________?

The specific fuel consumption per BHP hour for diesel engine is approximately___________________?

The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed____________________?

Combustion in compression ignition engines is____________________?