Mechanical Engineering - Workshop Technology

36. 

The oxidising flame is similar to neutral flame but the inner cone is less luminous and shorter.

A. Yes
B. No

Answer: Option A

Explanation:

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37. 

A hacksaw blade is specified by its

A. length
B. material
C. width
D. number of teeth

Answer: Option A

Explanation:

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38. 

According to Indian standard specifications, 100 H6/g 5 means that.

A. basic size is 100 mm
B. actual size is 100 mm
C. difference between the actual size and basic size is 100 mm
D. none of the above

Answer: Option A

Explanation:

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39. 

Which of the following statement is wrong?

A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
C. The castings produced by centrifugal casting method have open and coarse grained structure.
D. all of the above

Answer: Option C

Explanation:

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40. 

The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is

A. less than 0.1 percent
B. less than 0.3 percent
C. more than 0.3 percent
D. any where between 0.1 to 1 percent

Answer: Option C

Explanation:

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