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163.

Assertion (A): In the high energy rate forming method, the explosive forming has proved to be an excellent method of utilizing energy at high rate and utilizes both the high explosives and low explosives.
Reason (R):The gas pressure and rate of detonation can be controlled for both types of explosives.
(a) Both A and R are individually true and R is correct explanation of A
(b) Both A and R are individually true and R is not correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

asked in Mechanical Paper-2, 2010

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164.

Consider the following advantages of shell mould casting:
1. Close dimensional tolerance
2. Good surface finish
3. Low cost
4. Easier
Which of these are correct?
(a) 1, 2 and 3
(b) 2, 3 and 4
(c) 1, 2 and 4
(d) 1, 2, 3 and 4

asked in Mechanical Paper-2, 2010

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165.

The ratio between oxygen and acetylene gases for neutral flame in gas welding is
(a) 2 : 1
(b) 1 : 2
(c) 1 : 1
(d) 4 : 1

asked in Mechanical Paper-2, 2010

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166.

In arc welding, the arc length should be equal to
(a) 4.5 times the rod diameter
(b) 3 times the rod diameter
(c) 1.5 times the rod diameter
(d) rod diameter

asked in Mechanical Paper-2, 2010

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167.

In an inert gas welding process, the commonly used gas is
(a) hydrogen
(b) oxygen
(c) helium or argon
(d) krypton

asked in Mechanical Paper-2, 2010

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168.

Flank wear occurs on the
(a) relief face of the tool
(b) rake face
(c) nose of the tool
(d) cutting edge

asked in Mechanical Paper-2, 2010

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