Chapter 3 Flashcards
In a top supported boiler any expansion is in the:
A) Upwards direction
B) Sideways direction
C) Downwards direction
D) Both upwards and downwards
C
On a bottom supported boilers the bottom drum has __________ which allow for expansion.
A) Sliding disks
B) Sliding pads or feet
C) Roller bearings
D) Tilting pads
B
Boiler casing is made of steel plate which can withstand temperatures up to approximately:
A) 300 oC
B) 500 oC
C) 400 oC
D) 200 oC
C
Boiler casing insulation can be made in the form of:
A) Mineral wool blanket
B) Rockwool insulation
C) Refractory
D) Fiber glass
A
Refractory is used:
A) In the convection part of the furnace
B) In the Economizer section
C) In very high temperature zones of the furnace like burner throat area
D) In the Superheater section
C
Lagging is the:
A) Membrane wall surrounding the furnace
B) Metal covering that protects outer surfaces of the boiler
C) Cinder brick wall in surrounding the furnace
D) Mineral wool blanket surrounding the furnace
B
Welded boiler tubes are normally:
A) Butt welded
B) Lap welded
C) Have a backing plate
D) V joint weld
B
Processes for making seamless pipe are piercing and ____________.
A) Rolling
B) Puncture
C) Reeling
D) Extrusion
D
In the Extrusion method of making seamless pipe, the outside diameter is controlled by the:
A) Tap
B) Mandrel
C) Die
D) Roller
C
Selection of plate material used for boiler construction is given in ASME section:
A) PG 27.1
B) PG 6.1
C) PG 62.3
D) PFT 16.3
B
