Related Questions
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As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
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4
A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is
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4
The product of a commercial direct reduction process is
D. Iron saturated with carbon
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4
Thermal efficiency of an internal combustion engine is around __________ percent.
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4
Satellites burn off during re-entry to earth's atmosphere, because of the
B. Gravitational pull by earth
C. Friction with earth's atmosphere
D. Loss in weight of the satellite
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4
Sub zero treatment of steel is done to
A. Suppress martensite transformation
B. Enhance its working performance in sub zero atmosphere
C. Reduce the retained austenite in hardened steel
D. Induce temper brittleness after its hardening
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4
Pick out the correct combination about the role of various additives used in polymers.
A. Plasticiser: increases the polymer strength
B. Heat stabiliser: increases the maximum service temperature
C. Fillers: Does not affect the property of polymer but increases its weight
D. Lubricants: increases the flexibility of polymers
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4
'Flare tower' used in industry is meant for
A. Venting off (after burning) the excess inflammable/toxic gases at high pressure
B. Absorbing the pollutant gases from the furnace exhaust
C. Cooling of furnace exhaust gases
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4
__________ rubber is generally used for making 'O' rings used for vacuum sealings.
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Cementite is in the lamellar form in the __________ phase of steel.
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4
L.D. (Linz-Donawitz) converter is used in the production of
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4
Addition of silicon to cast iron
A. Promotes graphite module formation
B. Improves its ductility
C. Does not promote graphite flakes formation
D. Increases the fluidity of molten metal
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4
Quartz is a __________ material.
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4
Gantt charts are used for streamlining the
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Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when
A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
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4
Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
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4
Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
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4
Austempering process results in the formation of __________ structure.
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4
Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.
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Liquor poisoning generally occurs due to the presence of __________ in it.
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Drills are usually made of
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With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.
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The specific gravity of coal depends mainly on its __________ content.
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Cold heading or upsetting is categorised as the __________ process.
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Preheating before welding is done to
B. Burn oil & grease sticking to plate surfaces
C. Avoid plate distortion
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4
Encyclopaedia of Chemical Technology has been
A. Authored by Kirk Othmer
B. Edited by Perry and Chilton
D. Authored by Perry and Chilton
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4
Which of the following forces does not act on a fluid at rest?
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Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called
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Starting friction is low in case of the __________ lubrication.
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In the acid Bessemer process, the hot metal should have the following composition.
A. S < 0.05% and P < 0.05%
B. S < 0.05% and P < 1.5%
C. S < 0.05% and P > 1.5%
D. S > 1.5% and P < 0.05%