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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.

Volatility of diesel fuel oil is_________________?

A minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

B temperature at which it solidifies or congeals

C it catches fire without external aid

D indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

Review Detailed Answer

Correct Answer: indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

A 5 BHP engine running at full load would consume diesel of the order of_________________?

A 0.3 kg/hr

B 1 kg/hr

C 3 kg/hr

D 5 kg/hr

Review Detailed Answer

Correct Answer: 1 kg/hr

The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?

A 1 m3

B 5 m3

C 5-6 m3

D 9-10 m3

Review Detailed Answer

Correct Answer: 9-10 m3

Air fuel ratio at which a petrol engine can not work is_________________?

A 8 : 1

B 10 : 1

C 15 : 1

D 20 : 1 and less

Review Detailed Answer

Correct Answer: 20 : 1 and less

The theoretically correct air fuel ratio for petrol engine is of the order of___________________?

A 6 : 1

B 9 : 1

C 12 : 1

D 15 : 1

Review Detailed Answer

Correct Answer: 15 : 1

Scavenging is usually done to increase__________________?

A thermal efficiency

B speed

C power output

D fuel consumption

Review Detailed Answer

Correct Answer: power output

For the same power developed in I.C. engines, the cheaper system is_____________?

A naturally aspirated

B supercharged

C centrifugal pump

D turbo charger

Review Detailed Answer

Correct Answer: supercharged

Flash point of fuel oil is __________________?

A minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

B temperature at which it solidifies or congeals

C temperature at which it catches fire without external aid

D indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off

Review Detailed Answer

Correct Answer: minimum temperature to which1 oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

The operation of forcing additional air under pressure in the engine cylinder is known as________________?

A scavenging

B turbulence

C supercharging

D pre-ignition

Review Detailed Answer

Correct Answer: supercharging

The magneto in an automobile is basically__________________?

B d.c. generator

C capacitor

D magnetic circuit

Review Detailed Answer

Correct Answer: d.c. generator

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Volatility of diesel fuel oil is_________________?

A 5 BHP engine running at full load would consume diesel of the order of_________________?

The following volume of air is required for consuming 1 liter of fuel by a four stroke engine_______________?

Air fuel ratio at which a petrol engine can not work is_________________?

The theoretically correct air fuel ratio for petrol engine is of the order of___________________?

Scavenging is usually done to increase__________________?

For the same power developed in I.C. engines, the cheaper system is_____________?

Flash point of fuel oil is __________________?

The operation of forcing additional air under pressure in the engine cylinder is known as________________?

The magneto in an automobile is basically__________________?