Related Questions
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4
Propulsion of rocket follows from the
A. Newton's second law of motion
B. Newton's third law of motion
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4
The most serious manufacturing defect from fracture toughness point of view is
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4
Carbon supply in pack carburising process is in the form of
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4
Basicity of the slag in Indian blast furnace is in the range of
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Cementite is in the lamellar form in the __________ phase of steel.
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4
Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
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4
Water hammer is caused in steam carrying pipelines, because of
A. Partial condensation of steam
B. Vibration of the pipeline
C. High degree of superheat of steam
D. Its exposure to torrential rain
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4
__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.
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4
Which of the following hardness tests does not measure the indentation hardness of metals and alloys?
B. Shore scleroscope test
D. Rockwell hardness test
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4
__________ stress cannot be sustained by a fluid in equilibrium.
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4
Enzymes belong to the category of
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4
The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
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4
Material of construction of foundry crucible is
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__________ is not used as the control rod material in a nuclear reactor.
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4
Magnesium is present in
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Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.
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__________ iron is produced by the annealing of white cast iron.
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4
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
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4
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
A. Small punches, broaches reamers and springs
B. Cutlery, screws, rivets and files
C. Mandrels, twist drills, small lathe tools and razors
D. Forgings like can shaft, structural steel plate, threading dies and drawing dies
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4
The dimensional formula of bulk modulus of elasticity is same as that of the
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4
Joining of thin foils is preferred to be done by
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4
Air-petrol ratio for maximum power generation in spark ignition engine is about
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4
In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will
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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 contributes maximum as main source of sulphur in the blast furnace charge?
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4
Pick out the wrong statement.
A. Cold cracking of a weld is due to the presence of hydrogen gas in the weld
B. True stress is given by, σ = σE (1 + εE), where σE and εE are engineering stress and engineering strain respectively
C. Phosphorous can be easily recovered in the iron blast furnace
D. High residual stress at the surface is beneficial for fatigue properties of a material
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4
In the blast furnace, incorporation of water vapour in the blast gives the following effect.
A. Increases the reducing potential of the gas
B. Increases the flame temperature
C. No significant change occurs
D. Increases the hydrogen content in the metal
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4
Boiler draught of 10 mm water column is equivalent to
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4
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
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Steel is welded using the __________ flame.