Question: ‘Hypersil’ is a __________ steel.
[A].high speed
silicon
molybdenum
tungsten
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
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Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
Question: Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is
[A].used for making axle & shafts of aeroplanes, automobiles and locomotives.
having poor fatigue resistance.
having poor toughness.
not helpful in producing cleaner steel due to oxidising action of vanadium.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Molybdenum steels containing 0.15 to 0.40% molybdenum
Question: Molybdenum steels containing 0.15 to 0.40% molybdenum
[A].are prone to temper brittleness.
are used for automobile parts like gears, axle, shaft, bearings etc.
have very poor fatigue resistance.
do not contain nickel or chromium or both.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
Question: Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
[A].1.5-2
3.5-4.5
7-9
12-14
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
‘Semi steel’ is
Question: ‘Semi steel’ is
[A].produced by adding 10-20% steel to the cupola charge.
stronger than cast iron.
both (a) and (b).
neither (a) nor (b).
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Addition of nickel to copper improves its
Question: Addition of nickel to copper improves its
[A].machinability
ductility
strength
hardness
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Creep is not exhibited at low temperature by
Question: Creep is not exhibited at low temperature by
[A].rubber
acrylics
lead
plastics
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Bollman extractor
Question: Bollman extractor
[A].is a static bed leaching equipment.
is used for extraction of oil from oilseed.
is a centrifugal extractor.
employs only counter-current extraction.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Interchain forces are the weakest in case of
Question: Interchain forces are the weakest in case of
[A].plastics
fibres
elastomers
both rubber & elastomers
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Invar contains the highest percentage of
Question: Invar contains the highest percentage of
[A].vanadium
iron
tungsten
cobalt
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.