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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.

In the opposed piston diesel engine, the combustion chamber is located________________?

A above the piston (/;) below the piston

C between the pistons

D any when

Review Detailed Answer

Correct Answer: between the pistons

In a naturally aspirated diesel engine, the air is supplied by________________?

A a supercharger

B a centrifugal blower

C a vacuum chamber

D an injection tube

Review Detailed Answer

Correct Answer: a vacuum chamber

In the crankcase method of scavenging, the air pressure is produced by_________________?

A supercharger

B centrifugal pump

C natural aspirator

D movement of engine piston

Review Detailed Answer

Correct Answer: movement of engine piston

In loop scavenging, the top of the piston is________________?

A flat

B contoured

C slanted

D depressed

Review Detailed Answer

Correct Answer: contoured

A stoichiometric air-fuel ratio is______________________?

A chemically correct mixture

B lean mixture

C rich mixture for idling

D rich mixture for over loads

Review Detailed Answer

Correct Answer: chemically correct mixture

The air-fuel ratio in petrol engines-is controlled by__________________?

A controlling valve opening/closing

B governing

C injection

D carburettion

Review Detailed Answer

Correct Answer: carburettion

Pour point of fuel oil is the_________________?

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: temperature at which it solidifies or congeals

For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of _________________?

A 9 : 1

B 12 : 1

C 15 : 1

D 18 : 1

Review Detailed Answer

Correct Answer: 12 : 1

Air fuel ratio for idling speed of a petrol engine is approximately_________________?

A 1 : 1

B 5 : 1

C 10:1

D 15 : 1

Review Detailed Answer

Correct Answer: 10:1

Which of the following is the lightest and most volatile liquid fuel________________?

A diesel

B kerosene

C fuel oil

D gasoline

Review Detailed Answer

Correct Answer: gasoline

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

In the opposed piston diesel engine, the combustion chamber is located________________?

In a naturally aspirated diesel engine, the air is supplied by________________?

In the crankcase method of scavenging, the air pressure is produced by_________________?

In loop scavenging, the top of the piston is________________?

A stoichiometric air-fuel ratio is______________________?

The air-fuel ratio in petrol engines-is controlled by__________________?

Pour point of fuel oil is the_________________?

For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of _________________?

Air fuel ratio for idling speed of a petrol engine is approximately_________________?

Which of the following is the lightest and most volatile liquid fuel________________?