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GROUP A: Answer any three questions. (Question No. 1 is compulsory)

Q.1 Explain the procedure for designing an axially loaded unsymmetrical welded

section. (05)

Q.2 Write a rief note on the design of casting. (10)Q.! "esign a hollow shaft re#uired to transmit 11.2 $W at a speed of !00 rpm.

%he $ax. &hear stress allowed in the shaft is '0 $a and the ratio if the inner

t outer diameter is !*. (10)

Q.* "iscuss the design procedure of &pigot and &oc+et ,otter -oint. (10)

Q.5 "iscuss the arious types of &tresses induced in a flywheel rim. (10)

GROUP : Answer any three questions. (Question No. ! is compulsory)

Q./ What are the factors to e considered for the selection of the materials for the

design of machine elements (05)

Q. Explain clearly the earing stress deeloped at the area of contact etween twomemers. (10)

Q.' rectangular plate 50mm x 10mm with a hole 10mm dia. 3s su-ected to an

axial load of 104. %a+ing stress concentration into account6 find the

maximum stress induced.

(10)

Q.7 What are flexile couplings and what are their applications. (10)

Q.10 8nder what circumstances a fier rope and a wire rope is used &tate

adantages of wire rope. (10)

GROUP ": All Questions are "ompulsory.

Q.11 #ill in the $lan%s (&ach question carries ' mar%s)

(i) 3n thrust earing the load acts 9999999999999.

(ii) %he chain drie transmitspower as compared to elt drie.

(iii) %he electric arc welding is a type of 99999999999999 welding.

(i) law clutch is essentially a 999999999999 clutch.

() %he ,s of the flywheel arms is usually 9999999999999.

Q.1' ultiple choice question. (&ach question carries ' mar%s)

(i) %he taper on a rectangular sun +ey is 99999999999.

(a) 1 in 1/

() 1 in !2

(c) 1 in *'

(d) 1 in 100

(ii) :oo+s law holds good up to 99999999999.

(a) ;ield point

() Elastic point

(c) lastic limit

(d)

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(c) =inc

(d) luminum

(i) %he surface finish factor for a mirror polished material is 999999999.

(a)0. *5

() 0./5

(c) 0.'5(d) 1

() %he process extensiely used for ma+ing olts and nuts is 99999999999.

(a) :ot piercing

() Extrusion

(c) ,old enning

(d) ,old :eading

Q.1* +rue or ,alse (&ach question carries 1 mar%s)

(i) "ue to the centrifugal force acting on the rim6 the flywheel arms will e

su-ected to compressie stress.

(ii) 3n a crossed elt drie6 the shafts are arranged parallel > rotate in opposite

directions.

(iii) %he hot wor+ing of the metal sis carried out any temperature.

(i) %he rolling contact earings are +nown as thin luricated earings.

() %he steel pulleys are heaier in weight than cast iron pulley of same capacity.

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