Mechanical Engineering - Workshop Technology

31. 

Cast iron and steel pipes are produced by

A. slush casting
B. investment casting
C. true centrifugal casting
D. die casting

Answer: Option C

Explanation:

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32. 

The acetylene cylinder is usually painted with

A. black colour
B. white colour
C. maroon colour
D. yellow colour

Answer: Option C

Explanation:

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33. 

In order to ram the sand harder at the back of the mould and softer on the pattern face, a __________ is used.

A. sand slinger
B. squeezing machine
C. jolt machine
D. stripper plate machine

Answer: Option B

Explanation:

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34. 

The property of sand due to which the sand grains stick together, is called

A. collapsibility
B. permeability
C. cohesiveness
D. adhesiveness

Answer: Option C

Explanation:

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35. 

The temperature produced by oxy-hydrogen flame is about

A. 1800° C
B. 2100° C
C. 2400° C
D. 3200° C

Answer: Option C

Explanation:

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