Force between the molecules of the same substance is called __________ force.
A. Adhesive
B. Cohesive
C. Molecular
D. Vander Walls
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The trace metal present in insulin is
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Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
A. Cooling produces tension on the surface
B. Cooling produces compression on the surface
C. Heating does not produces any thermal stress
D. Heating produces compression on the surface
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Bad odour in sanitary latrines is reduced by periodically sprinkling
A. Bleaching powder
B. Lime powder
C. Aluminium sulphate
D. None of these
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Ceramic materials are
A. Organic in nature
B. Stronger in compression than in tension
C. Always amorphous in nature
D. Always bad heat conductors
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Electrostatic separation of minerals from each other is based on their differences in the following property.
A. Densities
B. Magnetic permeabilities
C. Electrical conductivities
D. Hardness
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Which of the following manufacturing processes produces the strongest components ?
A. Forging
B. Cold rolling
C. Hot rolling
D. Die casting
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Powder metallurgy processing can be used for making
A. Dispersion strengthened copper rod
B. Self lubricating bearing and cemented carbide
C. Connecting rod
D. Piston
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The leg of a barometric leg pump is longer than the Toricellian leg, which is about __________ metres.
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Which is the most lethal weapon ?
A. Atom (fusion) bomb
B. Hydrogen bomb
C. Cobalt bomb
D. Neutron bomb
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Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation
A. Pressure falls below the vapour pressure
B. Pressure becomes very high
C. Temperature becomes low
D. All of the above
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Tip of the match stick contains a mixture of
A. K + S
B. K + S + K2 Cr2 O7
C. S + K2 Cr2 O7 + White P
D. None of these
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A friction lighter is normally used for lighting gas welding torch, because of the reason that
A. Its initial cost is very low
B. Duration of spark created is very small
C. Safety of welder is ensured
D. It is easier to operate & maintain
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Gratings is associated with the measurement of
A. Linear displacement
B. Concavity/convexity
C. Surface texture
D. Flatness
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Nickel is a __________ material.
A. Ferromagnetic
B. Semi-conductor
C. Paramagnetic
D. Ferroelectric
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Coarse grained steels have
A. Low toughness
B. No tendency to distort
C. High density
D. Very high toughness
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Colloids can be purified by
A. Dialysis
B. Reverse osmosis
C. Coagulation
D. Peptization
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An oxidation process is accompanied with decrease in the
A. Number of electrons
B. Oxidation number
C. Number of ions
D. All of the above
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A reduction process is accompanied with increase in the
A. Number of electrons
B. Oxidation number
C. Both A & B
D. Neither A nor B
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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
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