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This quiz contains multiple-choice problems on boiling basics and equipment, boiling curve properties and calculations, reboiler classifications, and reboiler types.
In which type of boiling the temperature of steam is above its boiling point?
Which of the following boilers can be classified based on the position of water and hot gases?
Fire tube
Natural convection
External-fired
Internal-fired
There are two types of water feeding in a boiler; they are __ and __
Open-feed system and closed-feed system
Condensed and raw
Feed water and clean water
Hot and cold water
In a fire tube boiler, the water to be heated is kept in the
Tubes of the setup
Shell of the setup with hot gas in tubes
Tank with a fire chamber that conducts heat by steel rods
Tank and heated by fire below it
In water tube boilers, the flue/heating gases are passed through the __ of the setup.
Outer surface of the tank
Tubes of the setup
Covering shell
Chamber inside the water tank
When water is boiled, it releases saturated steam. Which one of the following industries cannot use this type of steam?
Steam locomotive
Food heating
Sanitation
Cooking
Water tube boilers generally give __ steam production rates and __ storage capacity than the fire tubes’ setup.
low, high
high, low
low, low
high, high
In flash boilers, the water is passed through __, which is/are very hot and lead(s) to quick vapour conversion or steam flashes.
Furnaces
Superheated steam
Sub-cooled steam
Explosives
The efficiency of the steam plant decreases by using superheated steam plants owing to the increased cost and consumption of fuels. True or false?
True
False
In a supercritical steam generator, water pressure is kept __ the critical pressure so that the water becomes steam directly and rotates turbines for electricity production.
Below
Above
Equal to
Much below
What boiling type involves a liquid temperature lower than saturation temperature and boiling occurring only in the heated surface’s vicinity?
Sub-cooled boiling
Superheated boiling
Saturated boiling
Pool boiling
The phenomenon of minimum heat flux in stable film boiling when heating a fluid with a tube is known as
Nucleate effect
Bubbling effect
Leiden frost effect
Radiation effect
Which of the following is not a classification of boilers?
Fire tube and water tube
Feed type
Pressure
Circulation
Fire tube boilers usually have a comparatively __ rate of steam production and __ steam storage capacity.
low, high
high, low
low, low
high, high
Furnace type boilers can be classified as single/dual furnace type boilers. True or false?
True
False
