Related Questions
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4
Blast furnace slag is mainly molten
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Dry saturated steam can be converted into superheated steam by
A. Increasing its cross-sectional area of flow
B. Passing it through a pressure reducing valve
C. Forcing it downwards through a vertical tube
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4
To improve the machinability of steel, it is generally subjected to
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Energy of the sun arises mainly from __________ reactions.
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Quartz is a __________ material.
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4
Nitriding of a steel part does not increase its
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4
Use of flux during soldering is done to
A. Increase fluidity of solder by lowering its melting temperature
B. Prevent oxide formation
C. Wash away surplus solder
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4
Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.
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4
Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting)
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About __________ ton of coke is required in a cupola to produce one ton of casting.
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4
Moist climate is the most favourable factor in the site selection far a
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The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is
D. More but less than the diameter of bolt
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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
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Often earing defects are found during deep drawing operation, because the
A. Surface finish of the sheet is poor
B. Sheet material has been given substantial spring back
C. Starting sheet has planer anisotropy due to its texture
D. Starting sheet has normal anisotropy due to its texture
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4
Which of the following terminology is used for the temperature at which new grains are formed in a metal?
B. Lower critical temperature
C. Recrystallisation temperature
D. Upper critical temperature
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4
Which of the following is not a charge material for cupola?
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Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?
A. Emissivity of pipe surface
B. Diameter & length of the pipe
C. Temperature of hot pipe surface & that of air in the room
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4
Working of linear variable differential transducer (LVDT) is based on the principle of variable
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4
Silicon percentage in acid resistant cast iron is about
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__________ has the highest melting point out of the following.
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A material is capable of resisting softening at high temperature, because of its property termed as
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A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.
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Joining of thin foils is preferred to be done by
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Atomic __________ of an element is a whole number.
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Pick out the wrong statement about the machinability of metals. Machinability of a metal
A. Decreases with increase in strain hardening tendencies
B. Decreases with increase in hardness, in general
C. Depend on the composition, microstructure and physical & mechanical properties
D. Decreases with increases in tensile strength & decrease in grain size
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4
The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
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4
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to
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4
Consider an ideal solution of components A and B. The entropy of mixing per mole of an alloy containing 50% B is
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4
In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is
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The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6)