Related Questions

An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
Large tonnage of refractory bricks are dried in a
A Shaft furnace
B Rotary hearth furnace
C Tunnel kiln
D Muffle furnace
A red house is built from red bricks . A blue house is built from blue bricks. A white house is built from white bricks. Then what is a greenhouse made from ?
A green bricks
B wood
C glass
D steel
The solid brick shown is made of small square shaped bricks of side 1. when the large brick is disassembled into its component small bricks. the total surface area of all the small bricks is how much greater than the surface area of the large brick?
A 32
B 40
C 60
D 72
Milk is dried usually in a __________ dryer.
A Freeze
B Spray
C Tray
D Rotary
Drying of refractory is normally carried out in a __________ dryer.
A Open pan
B Tray
C Rotary vacuum
D Truck/tunnel
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
A Mortars
B Cements
C Castables
D None of these
If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
Sticky material can be dried in a __________ dryer.
A Tray
B Rotary
C Fluidised bed
D None of these
Heat sensitive materials like certain pharmaceuticals and food stuffs can be dried in a/an __________ dryer.
A Indirect tray
B Spray
C Freeze
D None of these

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