Related Questions
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4
Brazing is the joining of metals
A. Without melting the base metal
B. With a non-ferrous filler
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4
Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
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4
The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
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4
A solid aluminium ball, when quenched in a water bath maintained at 40°C, cools down from 550°C to 450°C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about __________ °C.
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4
Powder metallurgy technique is used in the production of __________ tools.
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4
Electrochemical corrosion can occur, only if __________ is present in contact with metal.
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4
The most suitable material of construction for a sewer to carry sewage under high pressure is
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4
Carbon is present in the form of __________ in grey cast iron.
B. Nodular aggregates of graphite
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4
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
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4
Spheroidising of a material is a/an __________ process.
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4
Compressed dry air is used as the cutting fluid, while machining
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4
In chemical dehumidification process
A. Wet bulb temperature increases
B. Dry bulb temperature remains constant
C. Dew point temperature increases
D. Dry bulb temperature increases
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4
Broaching tools are usually made of
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4
As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.
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4
Plasma is
A. A high temperature neutral gas
B. Nothing but ionised gas
C. A source of steady and highest controllable pressure
D. Formed at very low temperature
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4
On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is
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4
The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.
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4
Which of the following metals reacts violently with water?
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4
Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per of steel strip.
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4
Stainless steel is welded using
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4
Speisses is a mixture of the following:
A. Arsenides of heavy metals
B. Antimonides of heavy metals
C. Arsenides & antimonides of heavy metals
D. Iron, cobalt and nickel
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4
Resilience of a bolt can be increased by increasing its
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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
When the wavelength of incident X-rays increases, the angle of diffraction
D. Shows no systematic variation
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4
Stresses encountered in the metal forming processes are less than the __________ of the material.
D. Limit of proportionality
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4
Faraday's law of electrolysis is related to the
B. Atomic number of the cation
C. Equivalent mass of the electrolyte
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4
Pick out the wrong statement.
A. A soft magnetic material should have high permeability and small area of hysteresis loop
B. Poisson's ratio of high melting point metals is more than unity
C. Solders generally melt at less than 185°C
D. Steel produced by B.O.F process is ideally suited for manufacturing flat product
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4
Steel & cast iron pipes are produced by __________ casting.
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4
A material being tested for endurance strength is subjected to the __________ load.
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4
Which of the following alloying elements is present in maximum percentage in high speed steel?