Related Questions
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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
Dislocation cross-slip is difficult in those materials, which have
A. Large number of slip systems
B. High work hardening rate
D. Low stacking fault energy
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4
Mild steel has __________ crystal lattice structure.
A. Face centred cubic (fcc)
B. Body centred cubic (bcc)
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4
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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4
Which of the following low melting alloy containing bismuth and lead is used for electric fuse?
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4
When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively
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4
Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
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4
Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
D. Thermal co-efficient of expansion
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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
In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, = velocity gradient).
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4
Name the safety device used to protect the boiler, when the water level falls below a minimum level.
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4
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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4
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
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4
At 100% relative humidity, the dew point temperature of moist air is
A. Less than the wet bulb temperature
B. More than the wet bulb temperature
C. Equal to the wet bulb temperature
D. Equal to the ambient temperature
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4
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%
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4
The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
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4
If a solid is compressed adiabatically in its elastic range, its __________ remains constant
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4
Stainless steel is welded with difficulty because of
A. Its high melting temperature
D. Chromium carbide formation
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4
__________ are normally subjected to sub-zero treatment.
B. Gauges or precision parts
D. Non machinable materials
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4
Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.
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4
Main constituent of bone ash is
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4
Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.
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4
The starting of a car takes time in winter, because the
A. Octane number of fuel is decreased
B. Fuel supply for ignition is not sufficient
C. Vaporisation of the fuel is decreased
D. Pour point of fuel decreases
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4
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
A. Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller
B. Maintaining vacuum on tube side is more difficult than that on the shell side
C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam
D. Condenser can act as a storage unit for condensed steam
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4
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
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4
Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
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4
Which of the following metals cannot be hot worked at room temperature?
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4
Temperature attained in soldering of metals is about __________ °C.
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4
__________ cannot increase the fatigue strength of a material.
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4
A psychrometer does not measure the __________ temperature of moist air.