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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.

Cetane___________________?

A has zero cetane number

B has 100 cetane number

C helps detonation

D is a straight chain paraffin

Review Detailed Answer

Correct Answer: is a straight chain paraffin

Iso-oct ,ne________________?

A has octane number of 0

B has octane number of 50

C has octane number of 100

D is an index of detonation quality

Review Detailed Answer

Correct Answer: has octane number of 100

Kerosene is distilled at________________?

A 30 – 65°C

B 65 – 220°C

C 220 – 350°C

D 350 – 450°C

Review Detailed Answer

Correct Answer: 220 – 350°C

Ignition quailty of petrol is expressed by___________________?

A octane number

B cetane number

C calorific value

D self ignition temperature

Review Detailed Answer

Correct Answer: octane number

In order to prevent formation of carbon on the injector, the temperature of nozzle tip should be__________________?

A less than 100°C

B between 100-250°C

C between 250 – 300°C

D between 400 – 500°C

Review Detailed Answer

Correct Answer: between 250 – 300°C

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

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Cetane___________________?

Iso-oct ,ne________________?

Kerosene is distilled at________________?

Ignition quailty of petrol is expressed by___________________?

In order to prevent formation of carbon on the injector, the temperature of nozzle tip should be__________________?

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______________________?