Related Questions
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Super conduction in metals is observed at a temperature of __________ °K.
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Which of the following heat treatment processes is usually applied to castings?
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The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres
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Basicity of the slag in Indian blast furnace is in the range of
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Pick out the wrong statement.
A. Complete unity of command exists in a line organisation
B. Line organisation is net suitable for expansion and growth of an industry
C. In line and staff organisation, line executes and staff directs
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4
In a good rimming steel
A. Carbon and silicon should be low
B. Silicon should be low but carbon should be high
C. Both silicon & carbon should be high
D. Silicon should be high but carbon should be low
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4
Ferromagnetic materials owe their properties to __________ inner sub-shells.
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Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of
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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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Viscoelastic behaviour is observed in __________ materials.
A. Non-crystalline organic polymeric
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What is the range of tempering temperature (°C) for most of the materials?
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Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
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For separating small pieces of metal from engine oil of a car, the best separating technique is the
D. Fractional distillation
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Ganister contains maximum percentage of
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__________ is a non volatile film forming constituent of a paint.
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Cold chisels hammers are made of
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Damage to metal surface by mechanical action is called
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In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material?
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Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
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Which of the following is the correct nature of shear stress distribution along the cross section in a horizontal circular pipe under steady state fluid flow condition?
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Which of the following gases cause global warming?
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__________ joint is mostly used for joining pipes carrying water at low pressure.
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The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
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Spherical shape of mercury droplets is due to its
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The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the 'Curie point', which is __________ °C.
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Tip of the match stick contains a mixture of
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With increase in temperature, the surface tension of water
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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
Dies for wire drawing are generally made of
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In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will