Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
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Expansion device used in a window air-conditioner is a/an
A. Automatic expansion valve
B. Thermostatic expansion valve
C. Float valve
D. Capillary tube
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With increase in annealing temperature, the following defect density decreases.
A. Vacancy
B. Dislocation
C. Grain boundary
D. All of the above
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Which of the following has the least oili-ness ?
A. Mineral oils
B. Vegetable oils
C. Greases
D. Animal oils
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Which of the following is a permanent fastening?
A. Rivets
B. Bolts
C. Screws
D. Keys
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Which of the following is a synthetic abrasive ?
A. Corundum
B. Emery
C. Pumice
D. Silicon carbide
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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?
A. Cresylic acid
B. Xanthaies
C. Pine oil
D. All of the above
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In __________ process, there is an increase in entropy with no degradation of energy.
A. Isothermal expansion
B. Isochoric heat addition
C. Polytropic expansion
D. Isobaric heat addition
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Wrought iron does not have
A. Uniform strength in all directions
B. Ability to hold protective coating
C. High ductility & corrosion resistance
D. Easily weldable characteristics
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Wrought iron does not have the
A. Uniform strength in all directions
B. Ability to hold protective coating
C. High ductility & corrosion resistance
D. Easily weldable characteristics
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Wrought iron is not
A. Uctile & resistant to corrosion/rusting
B. Weldable easily
C. Having uniform strength in all directions
D. Having maximum tensile strength along the lines of slag distribution
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Pick out the wrong statement.
A. Dry bulb temperature, wet bulb temperature & dew point are the same in case of saturated air
B. Dew point is reached by cooling the humid air at constant moisture content
C. Heating of humid air is done for its dehumidification
D. None of these
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Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.
A. Grey
B. Red
C. Orange
D. Violet
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Out of the following, the materials having maximum magnetic permeability is
A. Silicon steel (Si = 4%)
B. Cast iron
C. Wrought iron
D. Mild steel
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The phenomenon occurring during explosion of a hydrogen bomb is
A. Nuclear fission
B. Nuclear fusion
C. A combination of both nuclear fission & fusion
D. None of these
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X-rays are
A. Positively charged
B. Negatively charged
C. Neutral
D. Of higher wavelength than visible light
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Minimum thermal efficiency of a steam boiler may be around __________ percent
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Optical activity is a/an __________ property.
A. Additive
B. Constitutive
C. Both A & B
D. Neither A nor B
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The most important requirement for aluminium industry is the availability of cheap
A. Ore
B. Electrical power
C. Labour
D. Abundant water
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Shampoos are commercially not available in the form of
A. Powder
B. Gaseous mixture
C. Solution
D. Emulsion
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