The once through boiler is
The Benson boiler employs forced circulation and has a unique characteristic of the absence of steam separating drum. The entire process of heating, steam formation and superheating is done in a continuous tube and accordingly it is called as once-through boiler.
A supercritical boiler has a pressure range of
Blowing down of boiler water is the process to
Fusible plug is fitted in a boiler to
Which of the following is not a safety valve for the boilers?
Sliding type valve is used on steam engines for regulating flow of steam.
Which of the following fitting is a boiler mounting?
The basic purpose of boiler drum is to
Which one of the following safety devices is used to protect the boiler when the water level falls below a minimum level?
Example of water tube boilers:
- Babcock-Wilcox boiler (straight tube)
- Stirling boiler(bent tube)
- Benson boiler
- LaMont boiler
A device which is used to drain off water from steam pipes without escape of steam is called
In thermal power plants, the deaerator is used mainly to
In steam generators, a stoker acts as one of the following devices. What is this device?
Which device is used in thermal power plants to reduce level of pollution?
Which one of the following boiler accessories does not need "flue-gas” for its operation?
Economizer is used to preheat the feed water by using heat of flue gases. Air preheater is used to preheat the air by using heat of flue gases. Superheater is used to superheat the steam by using flue gases.
Injector does not uses flue gases during its operation.
A device used to heat feed water by utilizing the heat in exhaust flue gases before leaving through the chimney is called
Economizer utilizes exhaust gases to preheat the feed water.
Which one of the following is NOT an accessory for the boiler?
The blow-off valve of a boiler helps to
The function of an economizer in a steam power plant is to
An economizer is a device used to heat feed water by utilizing the heat in the exhaust Flue gases before leaving through the chimney, i.e., to increase the enthalpy of feed water.
An at temperature is used in same utility boilers
At temperature is used to control degree of superheat.
Benson boiler is one of the boiler having
Since Benson boiler is a super critical boiler hence no drum is required.
Blow down from boiler drum is carried with a view to
Once through boilers operate at
One through boiler operates above the critical pressure of water hence they are known as supercritical boiler.
Once through boilers will not have
Benson boiler is an example of once through boiler. Entire heating, from the steam formation to superheating is done in a single continuous tube.
But in this pump is required to make forced circulation of water.
The draught produced by a steam jet issuing from a nozzle placed in the chimney is called
In steam jet draught, draught is produced by a steam jet issuing from a nozzle placed in the chimney. Steam jet draught was used in locomotive boilers.
Draught in locomotive boilers is produced by
Match List-I (Name of Boiler) with List-ll (Type) and select the correct answer using the codes given below the lists:
1. Bent water tube
2. Once through flow
3. Vertical fire tube
4. Inclined water tube
5. Horizontal fire tube
A B C D
(a) 2 5 4 1
(b) 1 3 5 2
(c) 2 3 5 1
(d) 1 5 4 2
Which of the following thermal power plants will have the highest overall thermal efficiency?
Performance of mechanical draft cooling tower is superior to natural draft with
The shape of the lid of a manhole in a boiler is
Which one of the following sequence indicates the correct order for flue gas flow in the steam power plant layout?
The correct sequence is superheater, economizer, air preheater.
The main objective of boiler trial is