Materials and Construction

151. Diamagnetic materials are magnetised

1. Strongly
2. Only slightly
3. With eddy currents only
4. In a direction opposite to that of the applied field

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152. Dielectric strength of a material is

1. Its energy storage capacity
2. A magnetic property
3. Its capacity to resist the flow of current
4. Its capacity to withstand high voltage

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153. Dies for wire drawing are generally made of

1. Mild steel
2. Stainless steel
3. Carbides
4. High carbon steel

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154. Dilute sulphuric acid is transported in _________ pipes.

1. Mild steel
2. Lead
3. Copper
4. Special alloys

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155. Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of

1. Brass
2. Copper
3. High carbon steel
4. Aluminium

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156. Dry chlorine can be handled in a vessel made of

1. Iron or steel
2. PVC
3. Nickel
4. Brass

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157. Duralumin is an alloy of

1. Aluminium, copper and manganese
2. Aluminium, nickel and silicon
3. Aluminium and nickel
4. None of these

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158. Duriron is

1. Acid resistant, brittle and very hard
2. High silicon iron
3. Prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion
4. All (A), (B) and (C)

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159. Electronic structure of a material is generally studied by

1. Metallurgical microscope
2. Electron diffraction
3. Spectroscopic techniques
4. X-ray

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160. Evaporator used for concentrating tomato juice is made of

1. Nickel
2. Brass
3. Stainless steel-glass lined
4. Cast iron-rubber lined

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