Production Engineering - Section 1 (2)

Directions to Solve

Production Engineering - Section 1

9.

The machining of titanium is difficult due to

A.	high thermal conductivity of titanium
B.	chemical reaction between tool and work
C.	low tool-chip contact area
D.	none of these

Answer: Option C

Explanation:

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10.

In up milling, the thickness of chip is

A.	minimum at the beginning of the cut and maximum at the end of the cut
B.	maximum at the beginning of the cut and minimum at the end of the cut
C.	uniform throughout the cut
D.	none of these

Answer: Option A

Explanation:

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11.

In the relation VTⁿ = C, the value of n for carbide tools is

A.	0.1 to 0.2
B.	0.20 to 0.25
C.	0.25 to 0.40
D.	0.40 to 0.55

Answer: Option B

Explanation:

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12.

Which of the following statement is incorrect with reference of lathe cutting tools?

A.	The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
B.	The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
C.	The heel is that part of the tool which is shaped to produce the cutting edges and face
D.	The base is that surface of the shank which bears against the support and takes tangent pressure of the cut

Answer: Option C

Explanation:

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13.

The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

A.	carbide, ceramic, cermet, borazon
B.	ceramic, carbide, borazon, cermet
C.	cermet, carbide, ceramic, borazon
D.	borazon, ceramic, carbide, cermet

Answer: Option C

Explanation:

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14.

A left hand tool on a lathe cuts most efficiently when it travels

A.	from left to right end of the lathe bed
B.	from right to left end of the lathe bed
C.	with the help of a compound slide
D.	across the bed

Answer: Option A

Explanation:

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15.

The lead screw of a lathe has __________ threads.

A.	single start
B.	double start
C.	multi-start
D.	any one of these

Answer: Option A

Explanation:

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16.

Larger end cutting edge angle __________ tool life.

A.	increases
B.	decreases
C.	does not effect

Answer: Option B

Explanation:

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