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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.

Piston rings are plated with chromium,cadmium or phosphate in order to__________________?

A reduce cost

B improve surface finish

C prevent clogging

D reduce wear and eliminate scuffing

Review Detailed Answer

Correct Answer: reduce wear and eliminate scuffing

The pistons are usually given a coating such as tin plating in order to________________?

A reduce weight

B conduct heat efficiently

C reduce possibility of scoring

D reduce friction

Review Detailed Answer

Correct Answer: reduce possibility of scoring

If overhead clearance is less, then the following type of engine should be selected__________________?

A V-type

B In-line

C Vertical

D Horizontal

Review Detailed Answer

Correct Answer: Horizontal

The top piston ring nearer to the piston crown is known as_____________________?

A compression ring

B oil ring

C scrapper ring

D groove ring

Review Detailed Answer

Correct Answer: compression ring

Piston rings are usually made of___________________?

A cast iron

B aluminium

C phosphor bronze

D babbitt

Review Detailed Answer

Correct Answer: cast iron

Detonation is caused by the following unstable compounds______________________?

A peroxides, aldehydes and ketones

B peroxides, aldehydes, oxides and sul-phides

C aldehydes, oxides and ketones

D ketones and sulphur compounds

Review Detailed Answer

Correct Answer: peroxides, aldehydes and ketones

The function of a fuel pump in a petrol pump is to______________________?

A inject fuel in cylinder

B supply fuel when carburettor fails

C pump fuel so that it reaches carburettor (to improve thermal efficiency)

D does not exist

Review Detailed Answer

Correct Answer: pump fuel so that it reaches carburettor (to improve thermal efficiency)

The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?

A higher

B lower

C same

D depends on size of engine

Review Detailed Answer

Correct Answer: lower

The spark plug gap is normally maintained at________________?

A 0.1 to 0.2 mm

B 0.2 to 0.4 mm

C 0.45 to 0.6 mm

D 0.6 to 0.8 mm

Review Detailed Answer

Correct Answer: 0.45 to 0.6 mm

The delay period in petrol engine is of the order of__________________?

A 0.001 sec

B 0.002 see

C 0.01 sec

D 0.05 sec

Review Detailed Answer

Correct Answer: 0.002 see

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Piston rings are plated with chromium,cadmium or phosphate in order to__________________?

The pistons are usually given a coating such as tin plating in order to________________?

If overhead clearance is less, then the following type of engine should be selected__________________?

The top piston ring nearer to the piston crown is known as_____________________?

Piston rings are usually made of___________________?

Detonation is caused by the following unstable compounds______________________?

The function of a fuel pump in a petrol pump is to______________________?

The thermal efficiency of a petrol engine of two stroke with crank case scavenging as compared to four stroke petrol engine with same comperssion ratio will be_____________________?

The spark plug gap is normally maintained at________________?

The delay period in petrol engine is of the order of__________________?