Engineering :: Metallurgy
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| 81. |
Bronze is an alloy |
| A. |
Copper, lead and tin |
B. |
Copper, zinc and tin |
| C. |
Copper, zinc and tin |
D. |
Zinc, nickel and tin |
| E. |
Nickel, aluminium and copper |
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Answer: Option C
Explanation:
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| 82. |
Stellite contains |
| A. |
Cobalt, chromium and tungsten |
B. |
Cobalt, vanadium and nickel |
| C. |
Nickel, copper and zinc |
D. |
Nickel, zinc and aluminium |
| E. |
Copper, tin and lead |
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Answer: Option A
Explanation:
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| 83. |
Babbit metal is an alloy of |
| A. |
Tin, antimony and copper |
B. |
Tin, antimony and lead |
| C. |
Tin, copper and lead |
D. |
Tin, zinc and copper |
| E. |
Lead, zinc and copper |
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Answer: Option A
Explanation:
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| 84. |
Bell metal is an alloy of |
| A. |
Coper, tin, lead and zinc |
B. |
Copper, antimony, aluminium and zinc |
| C. |
Copper, lead and tin |
D. |
Copper and tin |
| E. |
Copper and lead |
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Answer: Option D
Explanation:
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| 85. |
Which of the following is the hardest? |
| A. |
Talc |
B. |
Fluorite |
| C. |
Quartz |
D. |
topaz |
| E. |
Corundum |
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Answer: Option E
Explanation:
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| 86. |
Which of the following is the softest material? |
| A. |
Corundum |
B. |
Diamond |
| C. |
Calcite |
D. |
Quartz |
| E. |
Fluorite |
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Answer: Option C
Explanation:
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| 87. |
Approximate Brinell Hardness number for talc is |
Answer: Option D
Explanation:
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| 88. |
Vicker's hardness number of diamond could be of the order of |
Answer: Option C
Explanation:
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| 89. |
Which of the following is a noble metal? |
| A. |
Aluminium |
B. |
Stainless steel |
| C. |
Nickel |
D. |
Platinum |
| E. |
Chromium |
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Answer: Option D
Explanation:
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| 90. |
Constantan is an alloy containing |
| A. |
Copper and zinc |
B. |
Copper and nickel |
| C. |
Lead and zinc |
D. |
Zinc and nickel |
| E. |
Lead and copper |
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Answer: Option B
Explanation:
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