Chemical Engineering - Materials and Construction

26. 

Dielectric strength of a material is

A. its energy stroage capacity.
B. a magnetic property.
C. its capacity to resist the flow of current.
D. its capacity to withstand high voltage.

Answer: Option D

Explanation:

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27. 

Which of the following stainless steels is non-magnetic ?

A. Ferritic
B. Martensitic
C. Austenitic
D. None of these

Answer: Option C

Explanation:

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28. 

18-4-1 high speed steel contains 18%, 4% and 1% respectively of

A. tungsten, vanadium and chromium
B. tungsten, chromium and vanadium
C. vanadium, chromium and tungsten
D. chromium, tungsten and vanadium

Answer: Option B

Explanation:

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29. 

Aluminium as a material of construction suffers from the disadvantage of

A. very high cost.
B. rather low tensile strength.
C. very low strength to weight ratio.
D. scarce availability.

Answer: Option B

Explanation:

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30. 

Babbit metal used for bearings is a____base alloy.

A. tin
B. lead
C. aluminium
D. copper

Answer: Option A

Explanation:

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