PRELIM No:1

For private circulation only.

ENGINEERING   DRAWING -1                                     Mumbai

3 HOURS  -- AT    A     STRETCH    PLEASE !!!          100  MARKS  

NOTE :

1. ANSWER ALL QUESTIONS , USING FIRST ANGLE PROJECTION METHOD
2. ALL DIMENSIONS ARE IN mm
3. ASSUME ANY MISSING DETAILS SUITABLY.

SECTION - I

Q:1 (a)]  A RIGHT ANGLED TRIANGLE  ABC IS TURNING UNIFORMLY AROUND ITS VERTICAL SIDE AB=90mm. THE BASE SIDE BC IS HORIZONTAL AND IS 50mm. A FLY "P" IS CRAWLING UNIFORMLY ON THE HYPOTENUSE CA FROM C TO A, IN ONE COMPLETE ROTATION OF THE TRIANGLE . DRAW & NAME THE PATH TRACED BY THE FLY IN ELEVATION AND PLAN.  

[ 12 MARKS ]

                                                          OR

Q:1 ( b)]A CIRCLE OF DIA.  50mm  IS ROLLING UNIFORMLY OVER A FIXED ARC OF RADIUS 90mm WITHOUT SLIP. FOR A COMPLETE REVOLUTION OF THE ROLLING CIRCLE, DRAW & NAME  THE PATH TRACED BY A POINT "P" , FIXED ON THE CIRCUMFERENCE  OF THE ROLLING CIRCLE. INITIAL POSITION OF THE POINT P IS 20mm OVER THE ARC& ON THE LEFT HAND SIDE OF THE ROLLING CIRCLE. DRAW A TANGENT TO THE CURVE AT A POINT ON THE CURVE AFTER 3/4 TH ROTATION OF THE CIRCLE.                                                                                                     [ 12 MARKS ]

Q:2] A STRAIGHT LINE PQ IS INCLINED AT 30⁰ TO THE HP & 45⁰ TO THE VP.THE END P IS 30mm BELOW THE HP, 50mm INFRONT OF THE VP.THE DISTANCE BETWEEN THE END PROJECTORS OF THE LINE IS 65mm . DRAW THE PROJECTIONS OF THE LINE , IF THE END Q IS IN THE FIRST QUADRANT.FIND LINE'S LENGTH & TRACES.                                  [ 12 MARKS ]

Q:3 (a)] KLM IS A TRIANGULAR PLANE OF SIDE KL=75mm ,LM=60mm & MK=45mm.
ITS LARGEST SIDE KL IS IN THE VP AND IS INCLINED AT 60⁰ TO THE HP.THE SURFACE OF THE TRIANGLE 'KLM' MAKES AN ANGLE OF 45⁰ TO THE VP.DRAW THE PROJECTOINS OF THE SURFACE & FIND ITS INCLINATION WITH THE HP.                                                                                           [ 13 MARKS]                                                       OR

Q:3 (b) ] AN ELLIPTICAL THIN FILM OF MAJOR AXIS 110mm & MINOR AXIS 40mm APPEARS  AS A CIRCLE OF DIA.40mm IN ITS FRONT VIEW WITH ITS MINOR AXIS INCLINED AT 45⁰ TO THE HP.DRAW THE PROJECTIONS OF THE FILM AND FIND ITS  INCLINATION WITH THE VP .                     [ 13 MARKS ]

Q:4] A PENTAGONAL PYRAMID OF BASE SIDE 35mm & SLANT HEIGHT 65mm, IS RESTING ON THE GROUND ON ONE OF ITS BASE CORNERS. A SLANT EDGE CONTAINING THIS RESTING CORNER IS VERTICAL. A VERTICAL PLANE CONTAINING THE VERTICAL EDGE & THE AXIS OF THE PYRAMID IS INCLINED AT 45⁰  TO THE VP.DRAW THE PROJECTIONS OF THE SOLID WHEN THE BASE OF THE SOLID IS TOWARDS THE OBSERVER.           [ 13 MARKS ]

SECTION -II

Q:5]DRAW ELEVATION , LOOKING ALONG THE DIRECTION "X".ADD PLAN & LEFT SIDE END VIEW FOR THE FOLLOWING MACHINE PART IN FIG.Q5..  

[ 15 MARKS ]

Q:6 ] DRAW SECTIONAL FRONT VIEW ON SECTION -AB , TOP VIEW & RIGHT SIDE VIEW FOR THE FOLLOWING MACHINE BLOCK IN FIG.Q6..

[ 20 MARKS ]

Q:7 ] A CONE OF DIAMETER 80 mm & 100 mm AXIS IS STANDING ON ITS BASE ON THE HP. IT HAS A CO-AXIAL SQUARE HOLE AT ITS BOTTOM UPTO A HEIGHT OF 35 mm. SIDE OF THE SQUARE HOLE IS 20 mm.ALL THE RECTANGULAR FACES ARE EQUALLY INCLINED TO THE VP. THE SOLID WITH THE HOLE IS CUT BY A VERTICAL SECTION PLANE INCLINED AT 45⁰ TO THE VP & IS 5 mm FROM THE AXIS OF THE SOLID.

DRAW SECTIONAL ELEVATION, PLAN , & SECTIONAL RIGHT HAND SIDE VIEW.

ADD TRUE SHAPE OF THE SECTION.

[ 15 MARKS ]

---AHFS---