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.

The proximate analysis of fuel lists__________________?

A various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume

B various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight

C fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash

D fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

Review Detailed Answer

Correct Answer: fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

The safety valve on boiler drum compared to safety valve on super heater is set at ________________?

A same value

B higher value

C lower value

D lower/higher depending on steam flow

Review Detailed Answer

Correct Answer: higher value

The three “Ts” for good combustion are____________________?

A temperature, time, and turbulance

B total air, true fuel, and turbulance

C thorough mixing, total air, and temperature

D total air, time, and temperature

Review Detailed Answer

Correct Answer: temperature, time, and turbulance

Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?

A higher effectiveness of boiler

B high calorific value coal being burnt

C fouling of heat transfer surfaces

D raising of steam temperature

Review Detailed Answer

Correct Answer: fouling of heat transfer surfaces

The capacity of induced draft fan compared to forced draft fan in a boiler is__________________?

A same

B more

C less

D less or more depending on size of boiler

Review Detailed Answer

Correct Answer: more

Boiler parameters are expressed by ___________________?

A tonnes/hr. of steam

B pressure of steam in kg/cm2

C temperature of steam in °C

D all of the above

Review Detailed Answer

Correct Answer: all of the above

Calorific value of coal is of the order of _______________________?

A 200-400 kcal/kg

B 800-1200 kcal/kg

C 2000-4000 kcal/kg

D 5000-8000 kcal/kg

Review Detailed Answer

Correct Answer: 2000-4000 kcal/kg

The condition of steam in boiler drum is always ___________________?

A dry

B wet

C saturated

D supersaturated

Review Detailed Answer

Correct Answer: wet

In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?

A remain unaffected

B improve C. worsen

C may improve/worsen depending on size

D unpredictable

Review Detailed Answer

Correct Answer: may improve/worsen depending on size

Overfire burning is the phenomenon of _____________________?

A supply of excess, air

B supply of excess coal

C burning CO and unburnts in upper zone of furnace by supplying more air

D fuel bed firing

Review Detailed Answer

Correct Answer: burning CO and unburnts in upper zone of furnace by supplying more air

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The proximate analysis of fuel lists__________________?

The safety valve on boiler drum compared to safety valve on super heater is set at ________________?

The three “Ts” for good combustion are____________________?

Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?

The capacity of induced draft fan compared to forced draft fan in a boiler is__________________?

Boiler parameters are expressed by ___________________?

Calorific value of coal is of the order of _______________________?

The condition of steam in boiler drum is always ___________________?

In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?

Overfire burning is the phenomenon of _____________________?