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Modern Materials
In general terms, in contrasting metallic and ceramic materials:
ceramics are less durable chemically than metals
most metals are more brittle than most ceramics
most ceramics are more brittle than most metals
none of the above
Author:
rikazzz
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Everyday Science
Communication satellite are in which orbit?
Geostationary orbit
Geosynchronous orbit
Semi synchronous orbit
None of these
Author:
rikazzz
Comment
Modern Materials
Feldspars are:
naturally occurring anhydrous aluminosilicates
synthetic anhydrous aluminosilicates
naturally occurri ng hydrous aluminosilicates
synthetic hydrous aluminosilicates
Author:
rikazzz
Comment
Everyday Science
The usual raw material for ceramics, generally found beneath the top soil is?
Sand
Slit
Clay
Plaster of Paris
Author:
rikazzz
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Everyday Science
The removal of top soil by water or wind is called
Soil wash
Soil erosion
Soil creep
Silting of soil
Author:
rikazzz
Comment
Everyday Science
Vacuum tubes have been replaced by:
Conductors
Diodes
Transistors
None of these
Author:
rikazzz
Comment
Everyday Science
Television signals are converted into light signals by:
Optical fiber
Transistor
Decoder
Photo diode
Author:
rikazzz
Comment
Modern Materials
Arthur C Clark the famous science fiction author while working as a radio operator in the World War –II
Proposed building a space elevator from carbon mono filaments
Postulated the existence of extra terrestrial artifacts on the moon
Proposed that a network of satellite in stationary orbit at very high altitudes around the earth be used to bounce communication signals all over the world
None of these
Author:
rikazzz
Comment
Modern Materials
In the usage of acrylic resins for denture construction, biocompatibility is improved by minimizing the quantity of which constituent?
benzoyl peroxide
tertiary amine
methyl methacrylate
PMMA
Author:
rikazzz
Comment
Modern Materials
The typical volumetric firing shrinkage of a conventional powder-slurry ceramic is:
l%
5%
10%
30-40%
Author:
rikazzz
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