Related Questions

Cermets are used for making
A Cutting tools
B Abrasives
C Both A & B
D Neither A nor B
Cermets are
A Composite material containing both ceramic & metallic constituents
B Having high strength & resistance to high temperature
C Used in space vehicles, missiles & nuclear energy plants
D All of the above
Cermets are __________ materials.
A Refractory
B Reinforced
C Abrasive
D Fully metallic
Ferromagnetic ceramic material is not used in the
A Thermal insulation
B Transformers
C Magnetic switches
D Television sets
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
A Slag cement
B Glasses
C Porcelain/Potteries
D Teflon
Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
A Graphite powder
B Thoria
C Zircon powder
D Beryllium
Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of
A Fireclay
B Silicon carbide
C Corrundum
D Siliceous fireclay
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
A 250
B 650
C 850
D 1000
Ceramic materials fabrication can not be done by
A Welding
B Slip casting
C Extrusion
D Plastic pressing
The instruction state that Sumi may need 4/9 square yards of one type of material and 2/3 square yards of another type of material for a project. She buys exactly that amount. After finishing the project, however, she has 8/18 square yards left that she did not use. What is the total amount of square yards of material Sumi used?
A 1/12
B 1/9
C 2/3
D 10/9

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