Model Question Paper

BF6-INTRODUCTION OF MANUFACTURING

Time : 3 hrs Maximum marks : 75

 

Instruction:

1. Question paper is divided into Group A, Group B and Group C

2. Each Group is 25 Marks

3. Figure to the right in bracket indicates marks.

4. Good Handwriting is expected

5. Assume suitable data if necessary.

 

Group A (25 Marks)

 

Answer any three questions (Question 1 is compulsory)

	(5)

 

(10)

Q.1 Draw a neat block diagram of a lathe showing its main parts ?

Q.2 Write short notes on any four of the following (i) hot forging,

(ii) wire drawing, (iii) recrystalization temperature (iv) hot spinning (v) rolling.

(10)

Q.3 What is Oxy-Acetylene Welding? Explain its Principle of Working. Also explain

(10)

various types of Gas Flames with the help of neat sketches. ?

Q.4 Sketch and describe the following milling operations:

(a) Slot milling, (b) end milling, (c) profile milling and (d) side milling.

(10)

Q.5 What are the properties of moulding sand, explain?

 

Group B (25 Marks)

Answer any three questions (Questions 6 is compulsory)

	(5)

 

Q.6 What are the various allowances given on a pattern, Explain ?

	(10)

 

Q.7 Define a core and core print. What are various components of a

(10)

gating system?

Q.8 Write down advantages and disadvantages of Patterns ?

(10)

Q. 9 Discuss lost wax- method of casting mentioning their advantages and

disadvantages?

 

(10)

Q.10 Write short notes on :

a) Roll forming b) Roll bending c) Shot preening

 

 

.

 

 

Group C (25 Marks)

All Questions are Compulsory.

Q.11 Fill in the blanks ( each question carry 2 marks)

 

1. --------- flame is used to weld hard surfacing materials.

 

2.In a lathe, cross-slide is mounted on the ----------.

 

3.An operation of reducing the cross-section of a bar and increasing its length is called as ------------.

 

4.The hot working is done above ----------- temperature.

 

5.In order to deliver molten metal from pouring basin to gate, a -------- is used.

Q.11 Multiple choice question. (Each question carry 2 marks)

 

1. A casting defect which result general enlargement of casting is called

(a) Shift (b) sand wash

(c) Swell (d) blowholes

 

2. The maximum temperature in ⁰C obtained in acetylene gas welding is

(a) 3200 (b) 1600

(c) 3800 (d) 3750

 

3. In carbon arc welding the electrode used is

(a) Consumable (b) non-consumable

(c) Both (d) none of these

 

4. Cast iron & steel pipes are produced by

(a) Slush casting (b) investment casting

(c) True centrifugal casting (d) die-casting

 

5. The operation to enlarge the mouth of a drilled hole to set the bolt heads and nuts is called

(a) Counter-sinking (b) Boring

(c) Counter-boring (d) any of these.

 

 

Q.11 True or false (each question carry 1 marks).

 

1. Boring is an operation of enlarging a hole.

2. A neutral flame is obtained by supplying equal volume of oxygen and acetylene.

3. In a hot chamber die casting machine melting pot is separate from the machine.

4. In forward welding, the weld is made from right to left.

5. Cold working process removes cracks.

 

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