Deemed University 2011 B.Tech Mechanical Engineering University: Lingayas University Term: V Title of the : Machine Drawing and CAD - Question Paper

Roll No. ..

 

Lingayas University

B.Tech. 2^nd Year (Term V)

Examination Feb 2011

Machine Drawing and CAD (ME - 206)

 

[Time: 1 Hours] [Max. Marks: 50]

Before answering the question, candidate should ensure that they have been supplied the correct and complete question paper. No complaint in this regard, will be entertained after examination.

Note: Attempt three questions in all. Question no. 1 is compulsory. Select two questions from Section B. Question no. 3 will be done on provided Graph Sheet.

Section A

Q-1.

Select the correct answer of the following multiple choice questions and fill in blanks. [10x1=10]

(i) The Direction option in ARC command is the direction of a

(a) tangent point at the end point (b) tangent line at the start point

(c) radial line between the center and start point (d) radial line between the center and end point

(ii) In CHAMFER command, the distances for chamfer

(a) have to be equal and can be given in any order

(b) can be equal or unequal and can be given in any order

(c) can be equal or unequal and the order depends upon the selection order of line to be chamfered

(d) None of the above

(iii) OFFSET command at a time allows offsetting an object

(a) only on one side of the object at a fixed distance

(b) on both sides of the object at a fixed distance

(c) only on one side of the object at any variable distance

(d) on both sides of the object at a variable distance

(iv) An Allen head screw has__________________ cavity in head.

(v) A key of semicircular shape is called as __________________Key.

(vi) To transmit the power at angle _______________ coupling is used.

(vii) Shaft parallel but with slight offset use ________________ coupling to transmit the power.

(viii) A tension spring gets _______________ load is applied.

(ix) Axial distance between centers of two adjacent coils in the helical spring is ________________

(x) A table containing list of items, material and quanity is called ____________________________

Section B

Q-2. (a) What is ment by the fit? What are the various types of fits? Give examples of each type. [12]

(b) Classify the different types of rivited joints [8]

 

Q-3. Draw the sectional front view, side view and top view of the following figures. [2x10=20]

 

(a) (b)

 

 

 

 

Q-4. The below given figure indicates a component with tolerance . Calculate the dimension 27g8 as

per IS-919 and determine the gap dimension G with tolerance. Given fundamental tolerance unit,

i=0.45(D)^1/3 +0.001(D) Microns

where D is the geometric mean of diameter step between 18 and 30 mm

Grade of tolerance, IT8 = 25i microns

Fundamental deviation, g = -2.5 (D)^0.34 Microns [20]