| 1. | _________ structure has maximum hardness ? | |
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Troostile
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Pearlite
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Martensite
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Sorbite
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Report Question| 2. | _______ has least coefficient of expansion ? | |
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Manganin
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Invar
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Constantan
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Duralumin
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| 3. | _______ is the essential gradient of any hardened steel ? | |
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Carbon
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Pearlite
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Austenite
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Martensite
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| 4. | ______ structure can be studied by naked eye ? | |
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Atomic
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Grain
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Micro
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Macro
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| 5. | ______ is used for bearing liner ? | |
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Brass
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Bronze
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Gun metal
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Babbitt metal
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| 6. | ______ is the most important element which controls the physical properties of steel ? | |
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Carbon
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Chromium
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Vanadium
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Tungsten
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| 7. | Practical fluids ? | |
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are viscous
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possess surface tension
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are compressible
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possess all the above properties
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| 8. | Property of a fluid by which its own molecules are attracted is called ? | |
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adhesion
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cohesion
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viscosity
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compressibility
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| 9. | For very great pressures, viscosity of most gases and liquids ? | |
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remains same
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increases
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decreases
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shows erratic behaviour
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| 10. | The bulk modulus of elasticity ? | |
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has the dimensions of 1/pressure
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increases with pressure
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is large when fluid is more compressible
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is independent of pressure and viscosity
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