Materials and Construction

31. A material capable of undergoing large permanent deformation, when subjected to tension is termed as

1. Friable
2. Ductile
3. Brittle
4. None of these

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32. A material is able to retain the deformation permanently by virtue of its

1. Elasticity
2. Plasticity
3. Ductility
4. Malleability

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33. A material is called 'ductile', if it can be

1. Drawn into wires
2. Hammered to a thin sheet
3. Fractured without deformation
4. Made lustrous by heating it

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34. A material no longer behaves elastically beyond

1. Plastic limit
2. Limiting load
3. Elastic limit
4. Breaking load

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35. A measure of toughness of a material is its

1. Percentage elongation
2. Yield strength
3. Ultimate strength
4. Area under stress-strain diagram

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36. A metallic alloy in which one of the constituent metal is _________, is called an amalgam.

1. Zinc
2. Mercury
3. Lead
4. Tin

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37. A steel alloy containing 36% nickel is called _________, which has a zero co-efficient of expansion.

1. Austenitic stainless steel
2. Heat resisting steel
3. Invar
4. High speed steel

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38. A suitable material of construction to use with fuming sulphuric acid is

1. Carbon steel
2. Stainless steel type 304
3. Nickel
4. Monel

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39. Ability of a material to _________ is indicated by its damping capacity.

1. Withstand compression
2. Absorb vibration
3. Absorb shock
4. None of these

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40. Ability of a material to absorb energy in deformation in the plastic range is characterised as its

1. Ductility
2. Toughness
3. Creep
4. Resilience

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