Related Questions
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__________ of hard alloy and tool steel is done to make it easily machinable.
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Which of the following is a commonly used manometric liquid for low pressure range?
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A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
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Material of construction of foundry crucible is
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Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium
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The same volume of all gases is representative of their
C. Gas characteristic constants
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Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
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Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
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All of the following alloying elements of steel increases hardness but sacrifice ductility, except
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The rolling process cannot be used to produce
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The following type of bonding is strongly directional in solids.
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A form of stress corrosion failure termed as 'season cracking' is generally observed in
A. Thermosetting polymers
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Ultimate strength in tension as compared to that in shear for steel is
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The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
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Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________ hardness.
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Absolute zero pressure can be attained at a temperature of
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The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of __________ mm.
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Softening of hardened steel is done by its
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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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One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m- 1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
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Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas)
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Atomic __________ is a whole number for an element.
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Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are:
A. Nickel, cobalt & chromium
B. Tungsten, chromium & cobalt
C. Manganese, chromium & cobalt
D. Tungsten, molybdenum & nickel
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Function of fusible plug in a boiler is to
A. Drain out water and sludge from the boiler during repair
B. Put off fire in the furnace when water level in the boiler falls to unsafe limit
C. Guard the boiler in case of abnormal rise in steam pressure
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Boiling point of water gets lowered at high altitudes (e.g., hills), because
B. Atmospheric pressure is low
C. Atmospheric pressure is high
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With decrease in the grain size of a material, its creep resistance
D. Either (A) or (B); depends on the material
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The substance used as a smoke screen in warfare is
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4
In inventory control theory, the economic order quantity (EOQ) is the
A. Lot size corresponding to break even analysis
B. Average level of inventory
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__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.
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Which of the following is not the function of a volute casing provided in a centrifugal pump?
A. To reduce the head loss in discharge
B. To increase the pump efficiency
C. To collect liquid from the periphery of the impeller and to transmit it to the delivery pipe at constant velocity
D. To increase the pump discharge rate