Ceramic nuclear metals compared to solid nuclear metals have

Ceramic compounds as compared to metallic compounds

A

Crystallise faster

B

Resist greater tensile stress at room temperature

C

Have higher melting temperature

D

Are better conductor of electricity at higher temperature

Ceramic recuperators compared to metallic recuperators for the same duty

A

Are lighter

B

Occupy more space

C

Are less costly

D

Have higher pressure differential between flue gas & air side

A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?

A

Ceramic capacitor

B

Mica capacitor

C

Both will have identical value of capacitance

D

It depends on applied voltage

Heavy metals got their name because compared to other atoms they have

A

Higher densities

B

Higher atomic masses

C

Higher atomic numbers

D

Higher atomic radii

Which of the following ceramic packing materials is the costliest of all?

A

Berl saddles

B

Raschig rings

C

Pall rings

D

Intalox saddles

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

Which of the following is not used as the ceramic material in 'cermets'?

A

Silicides

B

Oxides

C

Carbides

D

Nitrides

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 cutting tools are

A

Made by cold pressing of aluminium oxide powder

B

Available in the form of tips

C

Brittle and have low bending strength

D

All of these

Ceramic tools are fixed to tool body by

A

Soldering

B

Brazing

C

Welding

D

Clamping

Ceramic nuclear metals compared to solid nuclear metals have

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