Multiple-Choice Questions or Objective Type Questions on Boilers [PDF Included]

In every examination, Multiple-Choice Questions have a vital role. If you have a great collection of MCQ questions, you can increase your score easily. In this article, I will keep 40 numbers of Multiple-Choice Questions on Boilers that will help you in examinations and also in viva.

In the last section, there will be a Quiz test of 10 marks on Boilers. So, a total of 50 number questions are there.

At the end of this article, you will also find a PDF downloadable button from where you can download the PDF format of this MCQ sheet. So now let’s start the objective-type questions or viva questions.

MCQ questions or Viva Questions on Boilers

• Which one of the following is the water tube boiler?

1. Lancashire boiler
2. Locomotive boiler
3. Cornish boiler
4. Babcock and Wilcox boiler  ✔

• Which one of the following is not a water tube boiler?

1. Babcock and Wilcox boiler
2. Stirling boiler
3. Cornish boiler  ✔
4. La-Mont boiler

• Which one of the following boiler is a fire tube boiler?

1. Benson boiler
2. Yarrow boiler
3. Loeffler boiler
4. Scotch marine boiler  ✔

• Which one of the following boiler is not a fire tube boiler?

1. Benson boiler  ✔
2. Velcon boiler
3. Locomotive boiler
4. Cochran boiler

• Which one of the following is a horizontal boiler?

1. Cochran boiler
2. Lancashire boiler  ✔
3. Both 1 and 2
4. None of these

• Which one of the following is a vertical boiler?

1. Cochran boiler  ✔
2. Locomotive boiler
3. Lancashire boiler
4. Babcock and Wilcox boiler

• Which one of the following is not a high pressure boiler?

1. La-mont boiler
2. Benson boiler
3. Locomotive boiler  ✔
4. Velcon boiler

• How many flue tubes are there in Cornish boiler?

1. 1  ✔
2. 2
3. 3
4. 4

• How many flue tubes are there in Lancashire boiler?

1. 1
2. 2  ✔
3. 3
4. 4

• Which one of the following statement is not true?

1. Capacity of Cornish boiler is lower than that of Lancashire boiler  ✔
2. Capacity of Cornish boiler is higher than that of Lancashire boiler.

• Water tube boiler generates steam at pressure

1. Upto 65 bar
2. Upto 165 bar  ✔
3. Uptob 25 bar
4. Upto 80 bar

• Fire tube boiler generates steam at pressure

1. Upto 65 bar
2. Upto 165 bar 
3. Uptob 25 bar  ✔
4. Upto 80 bar

• Overall efficiency with economiser of a water tube boiler is

1. 90%  ✔
2. 75%
3. 65%
4. 55%

• Overall efficiency of a fire tube boiler is

1. 90%
2. 75%  ✔
3. 65%
4. 55%

• The rate of generation of steam in a water tube boiler is

1. 9 tonnes per hour
2. 90 tonnes per hour
3. 250 tonnes per hour
4. 450 tonnes per hour  ✔

• The rate of generation of steam in a water tube boiler is

1. 9 tonnes per hour  ✔
2. 90 tonnes per hour
3. 250 tonnes per hour
4. 450 tonnes per hour

• In a simple vertical boiler, the water tubes are:

1. Vertical
2. Horizontal
3. Inclined  ✔
4. None of these

• The diameter of the flue tubes of a Lancashire boiler is ____times that of shell.

1. 0.2
2. 0.4  ✔
3. 0.6
4. 0.8

• The diameter of the flue tubes of a Cornish boiler is ____times that of shell.

1. 0.2
2. 0.4 
3. 0.6  ✔
4. 0.8

• The locomotive boiler has____ numbers of fire tubes and ____ numbers of water tubes.

1. 157,34  ✔
2. 127,14
3. 117,04
4. 17,04

• Which type of boiler produce steam at high pressure?

1. Fire tube boiler
2. Water tube boiler  ✔

• Which one of the following is an example of mounting?

1. Water level indicator  ✔
2. Superheater
3. Economizer
4. None of these

• Which one of the following is an example of accessories?

1. Water level indicator
2. Safety valve
3. Pressure gauge
4. Superheater  ✔

• Which one of the following ensures the safety of the boiler?

1. Accessories
2. Mountings  ✔
3. None of these

• Which one of the following enhances the efficiency of the boiler?

1. Accessories  ✔
2. Mountings
3. None of these

• The function of the blow off cock valve is

1. To control the flow of steam
2. To regulate the supply of water
3. To put off the fire when the level of water falls to an unsafe level
4. To empty the boiler whenever required  ✔

• The function of the steam stop valve is

1. To control the flow of steam  ✔
2. To regulate the supply of water
3. To put off the fire when the level of water falls to an unsafe level
4. To empty the boiler whenever required

• The function of the feed check valve is

1. To control the flow of steam
2. To regulate the supply of water  ✔
3. To put off the fire when the level of water falls to an unsafe level
4. To empty the boiler whenever required

• The function of the fusible plug is

1. To control the flow of steam
2. To regulate the supply of water
3. To put off the fire when the level of water falls to an unsafe level  ✔
4. To empty the boiler whenever required

• Due to use Air Pre-heater, the changes in efficiency is:

1. 2% increase  ✔
2. 2% decrease
3. 20% increase
4. 20% decrease

• The heat losses in a boiler are:

1. Heat lost in dry flue gases
2. Heat lost in moisture present in the fuel
3. Heat lost due to unburnt carbon
4. All of these  ✔

• Equivalent evaporation is:

1. (total heat required to evaporate feed water)/2275
2. (total heat required to evaporate feed water)/2257  ✔
3. (total heat required to evaporate feed water)/7522
4. (total heat required to evaporate feed water)/5722

• The factor of evaporation is:

1. (h-hf)/2275
2. (h-hf)/7522
3. (h-hf)/7252
4. (h-hf)/2257  ✔

• In forced draught boiler, the fan is placed:

1. After the fire gate
2. Before the fire gate  ✔
3. None of these

• In an induced draught boiler, the fan is placed:

1. After the fire gate  ✔
2. Before the fire gate
3. None of these

• In which type of boiler, pressure inside the furnace is above the atmospheric pressure?

1. Induced draught boiler
2. Forced draught boiler  ✔
3. None of these.

• In which type of boiler, pressure inside the furnace is below the atmospheric pressure?

1. Induced draught boiler  ✔
2. Forced draught boiler
3. None of these.

• Which type of boiler requires more power to run?

1. Induced draught boiler  ✔
2. Forced draught boiler
3. None of these.

• Which type of boiler requires less power to run?

1. Induced draught boiler 
2. Forced draught boiler  ✔
3. None of these.

• The velocity of the flue gases through the chimney under the static draught of H’ is:

1. 2gH’
2. Sqrt of (2gH’) ✔
3. 2g/H’
4. H’/2g

Quiz on Boilers

Here is the quiz for you:

Conclusion

I hope that the Multiple-Choice Questions on Boilers will help you in your college/university examinations and different types of competitive examinations. I will be more encouraged if I get feedback from your end. Please don’t forget to give the feedback by writing in the comment box. Good Luck!