PRELIM No:5
For private circulation only.
ENGINEERING DRAWING -1 Mumbai
3 HOURS -- AT A STRETCH PLEASE !!! 100 MARKS
NOTE :
SECTION - I
Q:1 (a)] AN IDEAL GAS , AT CONSTANT TEMPERATURE , FOLLOWS THE LAW :
P*V = C ; where P= pressure , N/ Sq.mm ; V= volume , cubic mm ; C= constant product of P & V.
AT AN INSTANT P=30 N/Sq.mm AND V= 20 Cubic mm . DRAW THE CURVE FOLLOWED BY THE GAS BY A GEOMETRICAL METHOD [ WITHOUT CALCULATING THE COORDINATES OF THE POINTS ON THE CURVE ] & NAME THE CURVE. ALSO DRAW A TANGENT TO THE CURVE AT P=20 N/Sq.mm.
[12 MARKS ]
OR
Q:1 ( b)] A CIRCLE OF DIA.60 mm ROLLS WITHOUT SLIP ON AN INCLINED STRAIGHT LINE AB UPWARDS & GOES DOWNWARDS FROM THE PEAK POINT B TO POINT C ON THE STRAIGHT LINE BC. THE CIRCLE ROLLS BY HALF TURN WHILE ROLLING UPWARDS ALONG AB , UPTO B , & ROLLS THE REMAINING HALF TURN GOING DOWN FROM THE POINT B TOWARDS C. BOTH THE LINES ARE EQUALLY INCLINED TO THE GROUND AT 30 DEGREES. DRAW THE PATH TRACED BY A POINT P , ON THE CIRCUMFERANCE OF THE CIRCLE , WHEN THE INITIAL POSITION OF THE POINT IS AT THE POINT A , ON THE LINE AB. NAME THE PATH & DRAW A TANGENT TO THE CURVE AT A DISTANCE OF 30 mm ABOVE THE LINE BC , IN THE DOWNWARD TRAVEL.
[ 12 MARKS ].
Q:2] (a)] A STRAIGHT LINE AB 120 mm LONG IS DIVIDED by A POINT "P" IN A RATIO 1:3.THE POINT P IS 25 mm BELOW THE HP & 40 mm BEHIND THE VP. THE PLAN VIEW OF THE LINE MEASURES 80 mm, MAKING 60 DEGREES WITH THE REFERENCE LINE. THE LINE IS IN THE THIRD QUADRANT.HP. DRAW THE PROJECTIONS OF THE LINE AB , & FIND ITS INCLINATIONS WITH THE REFERENCE PLANES. ALSO LOCATE ITS TRACES ........... [ 12 MARKS ]
OR
Q:2 (b)] A LINE PQ MEASURES 100 mm .THE POINT P IS 36 mm BELOW THE HP & 24 mm BEHIND THE VP. THE VT OF THE LINE IS 16 mm ABOVE THE HP. THE PROJECTORS THROUGH THE VT & THE END P ARE 48 mm APART.THE END POINT Q IS IN FIRST QUADRANT. DRAW THE PROJECTIONS OF THE LINE & LOCATE ITS HT.FIND THE INCLINATIONS OF THE LINE WITH THE REFERENCE PLANES. [ 12 MARKS]
Q:3] A 300 - 600 - 900 SET SQUARE OF NEGLIGIBLE THICKNESS, HAS ITS SHORTEST EDGE 100 mm LONG IN THE VP. THE FRONT VIEW OF THE SET SQUARE IS AN ISOSCELES TRIANGLE . DRAW PROJECTIONS OF THE SET-SQUARE , WITH THE HYPOTENUSE OF THE SET SQUARE INCLINED AT 300 TO THE HP. FIND THE INCLINATION OF THE PLANE OF THE SET SQUARE WITH THE VP & THE HP. [ 13 MARKS ]
Q:4] A. DRAW THE PROJECTIONS OF A CONE OF BASE DIA.80 mm & HEIGHT 90 mm IS LYING ON ITS LATERAL SURFACE GENERATOR ON THE VP. IF THE APEX IS AWAY FROM THE HP& IF A PLANE CONTAINING THE RESTING GENERATOR & THE AXIS , IS PERPENDICULAR TO THE VP AND IS INCLINED TO THE HP AT 600 . FIND THE INCLINATIONS OF THE AXIS OF THE CONE , WITH THE HP & THE VP. [ 13 MARKS ]
SECTION -II
Q:5] A FRUSTUM OF CONE OF BASE DIA. 120 mm & TOP DIA.60 mm AND HEIGHT 70 mm , IS STANDING ON ITS BASE ON THE HP. IT HAS A CO-AXIAL PRISMATIC SQUARE HOLE OF SIDE 35 mm .IT IS CUT BY A SECTION PLANE PERPENDICULAR TO THE VP & INCLINED TO THE HP AT 450 AND PASSING THROUGH THE TOP EXTREME RIGHT SIDE CORNER OF THE SQ.HOLE .RETAIN THE MAXIMUM PORTION OF THE SOLID.
DRAW THE SECTIONAL T.V. & FV , AND DRAW THE TRUE SHAPE OF THE SECTION .
[ 15 MARKS ]
Q:6 ] Following FIGURE: Q6 SHOWS THE PICTORIAL VIEW OF A MACHINE BLOCK . DRAW THE FOLLOWING VIEWS.
a) FRONT VIEW , LOOKING IN THE DIRECTION OF ARROW 'X' .
b) TOP VIEW .
c) RIGHT SIDE VIEW .
SHOW ALL THE HIDDEN DETAILS & Show Minimum 10 Dimensions : USE 1:1 SCALE
[ 12 MARKS ]
Q:7 ]Following FIGURE:Q7 SHOWS THE PICTORIAL VIEW OF A MACHINE PART . DRAW THE FOLLOWING VIEWS USING 1:1 SCALE . .....[ 20 MARKS ]
a ) F.V ....................................................................... ...[7 marks]
b) TOP VIEW ................................................................[6 marks]
c) LEFT SIDE SECTIONAL VIEW ...............................[5 marks]
d) INSERT AT LEAST 10 MAJOR DIMENSIONS.......[ 2 marks ]
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