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.

Which of the following medium is compressed in a Diesel engine cylinder __________________?

A air aione

B air and fuel

C air and lub oil

D fuel alone

Review Detailed Answer

Correct Answer: air aione

As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

A peak pressure

B rate of rise of pressure

C rate of rise of temperature

D peak temperature

Review Detailed Answer

Correct Answer: rate of rise of pressure

Most high speed compression engines operate on __________________?

A Diesel cycle

B Otto cycle

C Dual combustion cycle

D Special type of air cycle

Review Detailed Answer

Correct Answer: Dual combustion cycle

For the same compression ratio_____________________?

A Otto cycle is more efficient than the Diesel

B Diesel cycle is more efficient’than Otto

C both Otto and Diesel cycles are, equally efficient

D compression ratio has nothing to do with efficiency

Review Detailed Answer

Correct Answer: Otto cycle is more efficient than the Diesel

It the temperature of intake air in IC engines is lowered, then its efficiency will_______________________?

A increase

B decrease

C remain same

D increase upto certain limit and then decrease

Review Detailed Answer

Correct Answer: increase

The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?

A 180°

B 125°

C 235°

D 200°

Review Detailed Answer

Correct Answer: 235°

The specific fuel consumption per BH hour for a petrol engine is approximately__________________?

A 0.15 kg

B 0.2 kg

C 0.25 kg

D 0.3kg

Review Detailed Answer

Correct Answer: 0.25 kg

Crankcase explosion in I.C. engines usuall occurs as ___________________?

A first a mild explosion followed by a bi explosion

B first a big explosion followed by a mil explosion

C both mild and big explosions occi simultaneously

D never occurs

Review Detailed Answer

Correct Answer: first a mild explosion followed by a bi explosion

The maximum temperature in the I.C. engine cylinder is of the order of ________________?

A 500- 1000°C

B 1000- 1500°C

C 1500-2000°C

D 2000-2500°C

Review Detailed Answer

Correct Answer: 2000-2500°C

The fuel in diesel engine is normally injected at pressure of_________________?

A 5-10 kg/cm2

B 20-25 kg/cm2

C 60-80 kg/cm2

D 90-130 kg/cm2

Review Detailed Answer

Correct Answer: 90-130 kg/cm2

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Which of the following medium is compressed in a Diesel engine cylinder __________________?

As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

Most high speed compression engines operate on __________________?

For the same compression ratio_____________________?

It the temperature of intake air in IC engines is lowered, then its efficiency will_______________________?

The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?

The specific fuel consumption per BH hour for a petrol engine is approximately__________________?

Crankcase explosion in I.C. engines usuall occurs as ___________________?

The maximum temperature in the I.C. engine cylinder is of the order of ________________?

The fuel in diesel engine is normally injected at pressure of_________________?