Related Questions
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__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.
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__________ test can be termed as the semidestructive test.
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Normalising of a casting does not
B. Refine its grain structure
D. Improve its mechanical properties
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Which of the following forces does not act on a fluid at rest?
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Fahrenheit and Centigrade scales have the same readings at
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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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Screws are specified by their __________ diameters.
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For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
A. 100% indirect reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction
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In __________ process, there is an increase in entropy with no degradation of energy.
B. Isochoric heat addition
D. Isobaric heat addition
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Pick out the wrong statement.
A. A ferromagnetic material becomes paramagnetic above the 'Curie temperature'
B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials
C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces
D. Tungsten steel and alnico are not hard magnetic materials
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Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?
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Potable water means the water used for
D. Evaporation to produce steam
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The joint for soldering is supported by binding wire made of
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Laser is a device to produce
D. A beam of coherent light
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Electrostatic separation of minerals from each other is based on their differences in the following property.
B. Magnetic permeabilities
C. Electrical conductivities
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The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be
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What is the percentage of chromium in 18-4-1 high speed steel?
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If the head is doubled in & centrifugal pump, the power required will increase in the ratio of
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The most important requirement for aluminium industry is the availability of cheap
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The product of a commercial direct reduction process is
D. Iron saturated with carbon
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Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.
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Plants produce carbohydrates from the CO2 present in the atmosphere by
B. Photochemical reaction
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The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.
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The product out from a cupola is called
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Boiler tube size is specified by its thickness and __________ diameter.
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While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.
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The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.
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The emf of a Deniell cell Zn | Zn2+ || Cu2+ | Cu can be increased by
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
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For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by
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Auto collimator is used to check