0iJ -: Roll No ~1\~ . [Total No. of Pages : 04 Total No. of Questions: 09] B. Tech. (AE) (ANE) (IE) (ME) (Sem. - 3rd) MACmNE DRAWING SUBJECT CODE: ME-207 Paper ID : [A0804] Time: 04 Hours Maximum Marks: 60 Instruction to Candidates: 1) Section - A is compulsory consisting of Ten questions carrying Two marks each. 2) Section - B contains Five questions carrying Five marks each and students has to attempt any Four questions. 3) Section - C contains three questions carrying Ten marks each and students has to attempt any Two questions. Section - A Ql) a) Explain with the help of suitable sketches the method of dimensioning: i) Arcs and ii) Angles. b) What is the purpose of caulking and fullering of rivet joints? c) What is the function of an eccentric in an engine? d) Name two head forms of rivets? e) Sketch the conventional method of representing pipe threads (internal and external). f) What is the specific use of an expansion pipe joint? g) What is the function of clearances in a Cottered joint? h) Why brasses are used in connecting rod ends and why are these made of soft metals? i) What is blow-off cock and where it is used? j) What is the advantage of providing bush in a bearing? Section - B Q2) Draw to scale 1: 1, the standard profile of a METRIC SCREW THREAD (external), taking an enlarged pitch = 55 mm. Give all the standard dimensions. Q3) Discuss the use of following commands available in Auto-CAD: a) Array b) Offset, and c) Mirror. R-1769 P.T.o. Q4) Represent two views of hexagonal nut and square nut with proportions and dia of bolt as 30 mm. Q5) Draw by a conventional method a right handed square thread. Take outside diameter = 64 mm, threaded length = 65 mm, and pitch = 15 mm. Q6) Draw free hand upper half sectional-front elevation of a protected type flange coupling on proportionate scale. Section - C Q7) Draw the full sectional Front view and Top view of the screw-jack assembly as shown in Figure below. Also make bill of Materials. ; ~ : I I t---- I <%>75 I I 6 I IPso J I 3 ! ..,., Q>IOO I ::? I ~ R-1769 2 Q8) FirstAngJe, Detail Drawings ofa25 mm Plummer Block are given in the next Figure. Assemble the parts and the following on a full scale a) Elevation, Right Half in Section b) Right End View, Right Hal f in Section c) Plan, Outside. Also prepare a BOM. PLUMMER R-1769 3 BLOCK