| 1. | As percentage of carbon increase in steel its _______ decreases ? | |
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Corrosion resistance
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Ultimate strength
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Hardness
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Ductility
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Report Question| 2. | Filling or decking in a cooling tower increases the rate of heat transfer by providing ? | |
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increased flow of water
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increased flow of air
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increased flow of water and air
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a large amount of wetted surface
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| 3. | For the products of_______ LD converter is used ? | |
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steel
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polythene
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graphite
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cast iron
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| 4. | In metals the size of coarse grains is greater than ? | |
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0.5 mm
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0.005mm
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0.0005 mm
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None of these
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| 5. | In blast furnace ______ is used as fuel ? | |
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producer gas
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coal
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coke
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diesel
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| 6. | By which of the following heat treatment processes, a small selected portion of the job can be hardened ? | |
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Nitriding
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Cyaniding
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Pack hardening
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None of these
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| 7. | Fluid is a substance that ? | |
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cannot be subjected to shear forces
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always expands until it fills any container
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has the same shear stress at a point regardless of its motion
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cannot remain at rest under action of any shear force
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| 8. | Liquids shapes ? | |
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can be compressed very much
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occupy definite shape
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are not affected by change in pressure and temperature
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None of these
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| 9. | The surface tension of mercury at normal temperature compared to that of water is ? | |
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more
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less
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same
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more or less depending on size of glass tube
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| 10. | Kinematic viscosity is dependent upon ? | |
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pressure
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distance
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density
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None of these
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