Related Questions
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4
The phenomenon occurring during explosion of a hydrogen bomb is
C. A combination of both nuclear fission & fusion
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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
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
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4
Silicon percentage in acid resistant cast iron is about
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For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys.
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4
The condition of diffraction from a crystal is given by
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Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of
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The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
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4
Preheating before welding is done to
B. Burn oil & grease sticking to plate surfaces
C. Avoid plate distortion
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4
The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double.
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Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.
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Magnesium is present in
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Laser welding is widely employed in the __________ industries.
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Which of the following if present in iron ore, enhances its value?
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4
A jet engine turbine blade is normally manufactured by
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4
The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
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Which of the following forces does not act on a fluid at rest?
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__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
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__________ of air does not increase with increase in temperature.
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Which of the following is a commonly used manometric liquid for low pressure range?
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Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
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4
Pick out the wrong statement.
A. Molecules with symmetrical arrangements (e.g. CH4 or CCl4) are non-polar
B. Generally, non-polar compounds are chemically inactive, conduct electricity poorly and do not ionise
C. Most of the hydrocarbons are non-polar
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4
Holes for riveting purposes should be preferably made by
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Which of the following contributes maximum as main source of sulphur in the blast furnace charge?
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The swift cup test evaluates the following property of a sheet metal.
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Which of the following phenomenon/ phenomena is/are diffusion controlled?
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Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene welding is __________ Nm3.
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4
Minimum thermal efficiency of a steam boiler may be around __________ percent
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4
Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?
B. Reichert-Meissl value test
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4
Energy of the sun arises mainly from __________ reactions.