Zinc is highly __________ at room temperature.
A. Ductile
B. Resistant to atmospheric corrosion
C. Malleable
D. Brittle
Select an option to see the answer and solution.
Brine solution is stored/treated in __________ lined vessels/pipes.
A. Rubber
B. Lead
C. Glass
D. Nickel
Select an option to see the answer and solution.
High speed cutting tool steels contain about __________ percent of tungsten.
A. 6-8
B. 18-20
C. 30-35
D. 50-55
Select an option to see the answer and solution.
Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel
A. Rubber
B. Monel
C. Glass
D. Nickel
Select an option to see the answer and solution.
Austenitic manganese steel used for making jaws of crushing machines contains about __________ percent manganese.
A. 1.5-2
B. 3.5-4.5
C. 7-9
D. 12-14
Select an option to see the answer and solution.
18-4-1 high speed steel contains 18%, 4% and 1% respectively of
A. Tungsten, vanadium and chromium
B. Tungsten, chromium and vanadium
C. Vanadium, chromium and tungsten
D. Chromium, tungsten and vanadium
Select an option to see the answer and solution.
SO3 is absorbed using H2 SO4 in a
A. Cast iron packed tower
B. Stainless steel plate tower
C. Packed steel tower lined with acid proof bricks
D. None of these
Select an option to see the answer and solution.
How many molecules per unit cell are there in a face centred cubic lettice?
Select an option to see the answer and solution.
Percentage elongation of a material is a measure of its
A. Ductility
B. Brittleness
C. Toughness
D. Malleability
Select an option to see the answer and solution.
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the
A. Ultimate tensile strength (U.T.S.)
B. Endurance limit
C. Elastic limit
D. None of these
Select an option to see the answer and solution.
Acid proof stoneware
A. Has very low strength
B. Cannot be heated
C. Is broken by small temperature changes
D. All of the above
Select an option to see the answer and solution.
Steel pipes are normally manufactured by __________ process.
A. Extrusion
B. Cold working
C. Forging
D. Electroforming
Select an option to see the answer and solution.
Invar contains the highest percentage of
A. Vanadium
B. Iron
C. Tungsten
D. Cobalt
Select an option to see the answer and solution.
The most distinguished property of malleable cast iron is its high
A. Ductility
B. Hardness
C. Malleability
D. None of these
Select an option to see the answer and solution.
Which of the following is not an alloy of nickel and chromium?
A. Inconel
B. Hastealloy
C. Nimonic alloys
D. Duralumin
Select an option to see the answer and solution.
Ball bearings are normally made of __________ steel.
A. High speed
B. High carbon
C. Chrome
D. Silicon
Select an option to see the answer and solution.
Steel balls for ball bearings are generally made of __________ steel.
A. Cast
B. Stainless
C. Free carbon
D. Carbon chrome
Select an option to see the answer and solution.
Clock pendulums are usually made of __________ steel.
A. High speed
B. Stainless
C. Heat resisting
D. None of these
Select an option to see the answer and solution.
Presence of high amount of silicon in cast iron
A. Suppresses the decomposition of Fe3 C
B. Increases the formation of graphite
C. Increases the contraction of the metal
D. Reduces its fluidity
Select an option to see the answer and solution.
18/8 steel is a/an __________ stainless steel.
A. Austenitic
B. Ferritic
C. Martensitic
D. None of these
Select an option to see the answer and solution.