BOILERMAKER COMPREHENSIVE EXAM QUESTIONS
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS BRAND NEW EXAM ALREADY GRADED A
The types of tray used in distillation columns are Ans✓✓✓sieve, valve
and bubble-cap
sieve tray Ans✓✓✓A metal plate containing drilled holes through which
the rising vapour can pass into the liquid flowing across the tray.
valve tray Ans✓✓✓Is fitted with a flapper valve which opens as vapour
passes through the hole.
valve tray Ans✓✓✓This type is used where vapour velocity is not
constant and prevent liquid from dumping through the holes at times of
low gas velocity.
bubble-cap Ans✓✓✓It consists of a number of 'Chimneys' or 'Risers'
(small, short pipes set into the tray), through which the vapour can pass.
weir Ans✓✓✓Maintains the liquid level on the tray.
downcomer Ans✓✓✓Carries the liquid down to the tray below, acting
as a seal to prevent gas from bypassing the tray above.
,tray type tower Ans✓✓✓Is a tall, cylindrical column. Inside, a series of
trays are placed, one above the other. They are used to bring the rising
vapour and falling liquid into intimate contact.
packed type tower Ans✓✓✓Is a vertical, steel column which contains
'Beds' of packing material which are used to bring the rising vapours into
intimate contact with falling liquid within the tower. The heat added to
the mixture before entering the tower partially vaporises the mixture and
the vapours rise up the tower and begin to cool.
Cross-Bolting Ans✓✓✓The proper tightening sequence for a flange is a
______________pattern.
Torque Ans✓✓✓The proper amount of tightening force for a flange is
know as the _______________.
Safety Relief Valves Ans✓✓✓Are installed on equipment to prevent
over-pressure (or excess vacuum), which could cause damage, rupture or
collapse of the equipment.
Glove valve Ans✓✓✓Is used where control of fluid flow or pressure is
required and it can be operated in any position between open and closed.
Gate valve Ans✓✓✓Is the most common type of valve in use in industry
and is used to start or stop the flow of fluids. It gives a positive shut-off
when closed and is often used as a 'Block Valve' for isolating systems.
, Check valve Ans✓✓✓These valves will allow fluid flow in ONE
DIRECTION ONLY. Their purpose is to prevent backflow
heat exchanger Ans✓✓✓Is a device used to transfer heat between one or
more fluids. The fluids may be separated by a solid wall to prevent
mixing or they may be in direct contact.
riley underfeed Ans✓✓✓A stoker is fitted with secondary pusher
blocks. This type would be know as a(n)
traveling grate Ans✓✓✓The type of mechanical stoker which uses
hollow grate bars is the ______________ stoker.
easier to clean fires Ans✓✓✓What is the advantage of dump grates over
stationary grates?
air pressure would decrease Ans✓✓✓If the ash pit is NOT continually
cleaned on a boiler having dump grates_________________.
soot from outside the tubes Ans✓✓✓The purpose of a steam lance, as
used in a boiler, is to remove.
soot Ans✓✓✓Is a mass of impure carbon particles resulting from the
incomplete combustion of hydrocarbons.
WITH DETAILED VERIFIED AND 100% ACCURATE
ANSWERS BRAND NEW EXAM ALREADY GRADED A
The types of tray used in distillation columns are Ans✓✓✓sieve, valve
and bubble-cap
sieve tray Ans✓✓✓A metal plate containing drilled holes through which
the rising vapour can pass into the liquid flowing across the tray.
valve tray Ans✓✓✓Is fitted with a flapper valve which opens as vapour
passes through the hole.
valve tray Ans✓✓✓This type is used where vapour velocity is not
constant and prevent liquid from dumping through the holes at times of
low gas velocity.
bubble-cap Ans✓✓✓It consists of a number of 'Chimneys' or 'Risers'
(small, short pipes set into the tray), through which the vapour can pass.
weir Ans✓✓✓Maintains the liquid level on the tray.
downcomer Ans✓✓✓Carries the liquid down to the tray below, acting
as a seal to prevent gas from bypassing the tray above.
,tray type tower Ans✓✓✓Is a tall, cylindrical column. Inside, a series of
trays are placed, one above the other. They are used to bring the rising
vapour and falling liquid into intimate contact.
packed type tower Ans✓✓✓Is a vertical, steel column which contains
'Beds' of packing material which are used to bring the rising vapours into
intimate contact with falling liquid within the tower. The heat added to
the mixture before entering the tower partially vaporises the mixture and
the vapours rise up the tower and begin to cool.
Cross-Bolting Ans✓✓✓The proper tightening sequence for a flange is a
______________pattern.
Torque Ans✓✓✓The proper amount of tightening force for a flange is
know as the _______________.
Safety Relief Valves Ans✓✓✓Are installed on equipment to prevent
over-pressure (or excess vacuum), which could cause damage, rupture or
collapse of the equipment.
Glove valve Ans✓✓✓Is used where control of fluid flow or pressure is
required and it can be operated in any position between open and closed.
Gate valve Ans✓✓✓Is the most common type of valve in use in industry
and is used to start or stop the flow of fluids. It gives a positive shut-off
when closed and is often used as a 'Block Valve' for isolating systems.
, Check valve Ans✓✓✓These valves will allow fluid flow in ONE
DIRECTION ONLY. Their purpose is to prevent backflow
heat exchanger Ans✓✓✓Is a device used to transfer heat between one or
more fluids. The fluids may be separated by a solid wall to prevent
mixing or they may be in direct contact.
riley underfeed Ans✓✓✓A stoker is fitted with secondary pusher
blocks. This type would be know as a(n)
traveling grate Ans✓✓✓The type of mechanical stoker which uses
hollow grate bars is the ______________ stoker.
easier to clean fires Ans✓✓✓What is the advantage of dump grates over
stationary grates?
air pressure would decrease Ans✓✓✓If the ash pit is NOT continually
cleaned on a boiler having dump grates_________________.
soot from outside the tubes Ans✓✓✓The purpose of a steam lance, as
used in a boiler, is to remove.
soot Ans✓✓✓Is a mass of impure carbon particles resulting from the
incomplete combustion of hydrocarbons.
