Steam Boilers and Engines MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Steam Boilers and Engines, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Steam Boilers and Engines MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Steam Boilers and Engines mcq questions that explore various aspects of Steam Boilers and Engines problems. Each MCQ is crafted to challenge your understanding of Steam Boilers and Engines principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Steam Boilers and Engines MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

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Steam Boilers and Engines MCQs | Page 3 of 25

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Q21.
Cut-off governing of steam engines is a method of controlling the engine output by varying

a.

volume of intake steam

b.

pressure of intake steam

c.

temperature of intake steam

d.

all of these

Discuss
Answer: (a).volume of intake steam
Q22.
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

a.

56%

b.

63%

c.

74%

d.

78%

Discuss
Answer: (b).63%
Q23.
A safety valve mainly used with locomotive and marine boilers is

a.

lever safety valve

b.

dead weight safety valve

c.

high steam and low water safety valve

d.

spring loaded safety valve

Discuss
Answer: (d).spring loaded safety valve
Q24.
Which of the following boiler is best suited to meet the fluctuating demand of steam ?

a.

Locomotive boiler

b.

Lancashire boiler

c.

Cornish boiler

d.

Babcock and Wilcox boiler

Discuss
Answer: (a).Locomotive boiler
Q25.
Which of the following statement is correct ?

a.

Lancashire boiler is a fire tube boiler.

b.

Fire tube boilers are internally fired.

c.

Babcock and Wilcox boiler is a water tube boiler.

d.

all of the above

Discuss
Answer: (d).all of the above
Q26.
The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called

a.

induced steam jet draught

b.

chimney draught

c.

forced steam jet draught

d.

none of these

Discuss
Answer: (c).forced steam jet draught
Q27.
Which of the following statement is wrong ?

a.

The factor of evaporation for all boilers is always greater than unity.

b.

The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.

c.

The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.

d.

none of the above

Discuss
Answer: (d).none of the above
Q28.
The function of a crosshead is to guide motion of the __________ and to prevent it from bending.

a.

piston rod

b.

connecting rod

c.

eccentric rod

d.

valve rod

Discuss
Answer: (a).piston rod
Q29.
The cylinder dimensions of a compound engine may be designed on the basis of

a.

equal power developed in each cylinder for uniform turning moment

b.

equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders

c.

equal temperature drop in each cylinder for economy of steam

d.

all of the above

Discuss
Answer: (d).all of the above
Q30.
The function of a piston rod is

a.

to guide motion of the piston rod and to prevent it from bending

b.

to transfer motion from the piston to the cross head

c.

to convert heat energy of the steam into mechanical work

d.

to exhust steam from the cylinder at proper moment

Discuss
Answer: (b).to transfer motion from the piston to the cross head
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