CBSE Class 12 fabrication technology theory Question Paper III 2011 (Set 1)

Solve 2011 CBSE : fabrication technology theory question paper Set 1

1. (a) What is a transition fit ? 2

(b) With the help of sketch, explain the shaft basis system of designating fits. 3

(c) Explain the following terms with the help of sketches: 3

(i) Limit

(ii) Basic size

(iii) Fundamental deviation

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2. (a) With the help of sketch, explain the use of an angle plate jig. 3

(b) What are the advantages of jigs and fixtures? 2

(c) How does a template jig differ from a channel jig? 3

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3. (a) How does a screw pitch gauge measure unknown pitch of a thread? 2

(b) With a neat sketch, explain the working of a vernier depth gauge. Set up a reading of 24.3 mm on the gauge. 3

(c) With a sketch explain the working of a dial indicator. 3

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4. (a) Explain with the help of example, the difference between single sampling and double sampling plan. 4

(b) Explain process capability with an example. 4

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5. (a) Explain the following: 4

(i) Fixed cost

(ii) Prime cost

(b) Estimate the cutting time required to turn a 600 mm long and 120 mm diameter brass rod, to reduce half of its length to 110 mm diameter and the remaining half to 104 mm diameter in two cuts, at a constant cutting speed of 30 m/minute, with a high speed steel tool. The first cut feed is 2 mm/rev. and second cut feed is 0.5 mm/rev. 4

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CBSE Class 12 fabrication technology theory Question Paper III 2011 (Set 1)