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.

Presence of moisture in fuel oil would____________________?

A keep the burner tips cool

B aid in proper combustion

C cause sputtering, possibly extinguish¬ing flame

D clean the nozzles

Review Detailed Answer

Correct Answer: cause sputtering, possibly extinguish¬ing flame

Primary air is the air used to__________________?

A provide air around burners for obtaining optimum combustion

B transport and dry the coal

C convert CO (formed in lower zone of furnace) into C02 at higher zone

D air-delivered by forced draft fan

Review Detailed Answer

Correct Answer: transport and dry the coal

02 content in atmospheric air on volume basis is___________________?

A 21%

B 23%

D 40%

Review Detailed Answer

Correct Answer: 21%

The economizer is used in boilers to _______________________?

A increase thermal efficiency of boiler

B economise on fuel

C extract heat from the exhaust flue gases

D increase flue gas temperature

Review Detailed Answer

Correct Answer: increase thermal efficiency of boiler

For combustion of a fuel, following is essential_____________________?

A correct fuel air ratio

B proper ignition temperature

C 02 to support combustion

D all the three above

Review Detailed Answer

Correct Answer: all the three above

Bomb calorimeter is used to determine ___________________?

A Higher calorific value at constant volume

B Lower calorific value at constant volume ,

C Higher calorific value at constant pressure

D Lower calorific value at constant pressure

Review Detailed Answer

Correct Answer: Higher calorific value at constant volume

Proximate analysis of fuel is determination of percentage of ____________________?

A carbon, hydrogen, nitrogen, sulphur, moisture

B fixed carbon, ash, volatile matter, moisture

C higher calorific value

D lower calorific value

Review Detailed Answer

Correct Answer: fixed carbon, ash, volatile matter, moisture

Reheating of steam under ideal conditions takes place at constant __________________?

A entropy

B enthaply

C pressure

D temperature

Review Detailed Answer

Correct Answer: temperature

Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?

A desirable

B economical

C essential

D optional

Review Detailed Answer

Correct Answer: economical

Steam exhaust from high pressure turbine is reheated in _____________________?

A boiler drum

B superheater tubes

C economiser

D a separate coil

Review Detailed Answer

Correct Answer: a separate coil

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Presence of moisture in fuel oil would____________________?

Primary air is the air used to__________________?

02 content in atmospheric air on volume basis is___________________?

The economizer is used in boilers to _______________________?

For combustion of a fuel, following is essential_____________________?

Bomb calorimeter is used to determine ___________________?

Proximate analysis of fuel is determination of percentage of ____________________?

Reheating of steam under ideal conditions takes place at constant __________________?

Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?

Steam exhaust from high pressure turbine is reheated in _____________________?