Related Questions
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4
Which of the following is an unconventional source of energy?
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While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ × Tm (where, Tm Melting temperature).
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4
Normalising of a casting does not
B. Refine its grain structure
D. Improve its mechanical properties
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__________ of grey cast iron produces white cast iron.
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Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
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Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
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Steel produced from phosphatic iron is __________ in nature.
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Cast iron contains __________ percent carbon.
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4
Air intake for an air compressor should be preferably taken from
A. A site, where cooling towers are located nearby
B. A site, where open coal yard in located nearby
C. An air conditioned room maintained at a temperature of 18°C
D. An outside atmosphere at 10°C
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4
A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient.
B. Inversely proportional to
C. Directly proportional to
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Optical activity is a/an __________ property.
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With increase in annealing temperature, the following defect density decreases.
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Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.
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4
Steels with high carbon equivalent have poor Weldability, because in these steels during welding
A. Carbon and other alloying elements get oxidised from the weld pool
B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld
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4
The elastic strain in copper is due to the
A. Motion of dislocations
B. Stretching of atomic bonds
C. Breakage of atomic bonds
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4
Maximum hardenability of steel depends upon its
D. Alloying elements content
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A material subjected __________ must have high resilience.
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__________ is used for tying the steel columns to concrete foundation.
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The following type of bonding is strongly directional in solids.
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4
Air-petrol ratio for maximum power generation in spark ignition engine is about
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4
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
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4
The escape velocity of a body on earth which is independent of its mass is about __________ km/second.
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Which of the following gases cause global warming?
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Dislocations are __________ defects.
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Water flow in the river during flood can be categorised as the __________ flow.
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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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Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
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4
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
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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One ton of refrigeration is not equivalent to the heat removal rate of