The The leng length th to to heig height ht rat ratio io o off an Clo Close sed d fill filled ed arr arrow ow head head is is (a) 1:3
iv) iv)
(b) 3:1
(c) 1:2
(d) 2:1
The The two two rec recom omme mend nded ed syst system ems s of of plac placin ing g the the dime dimens nsio ions ns are are (a) Unidirectional Unidirectional and Aligned Aligned systems (b) Upright and inclined systems systems (c) inear and obli!"e systems (d) (d) inear and inclined ned systems
v)
#hic #h ich h of of the the ffol ollow lowing ing is the the cor corre rect ct stat statem emen entt ffor or dime dimens nsio ioni ning ng a view view:: (a) All of them sho"ld sho"ld be placed placed within within a view (b) All of them sho"ld be placed placed close to the parts being dimensioned (c) They sho"ld be mar$ed from visible visible o"tlines rather than from hidden line (d) %imensions indicated in one view may be repeated in another another view
vi) vi)
The The dim dimen ensi sion on fig fig"r "re e ffor or dia diame mete terr of of a cir circl cle e sho" sho"ld ld b be: e: (a) &receded by by th the sy symbol ' '' (c) &receded by the symbol '%'
vii)
#hiich of the followin #h owing g is not a specified method for dimensioning+ (a) &a &arallel di dimensioning (c) Contin"o"s Contin"o"s %imensioni %imensioning ng
*i)
(b) " "ffi*ed by by th the s sy ymbol ' '' (d) (d) "ffi*ed by the symbol '%' (b) &erpendic"lar d diimensioning (d) %imensioning by coordinates
,o"nded interior corner is called (a) ,o"nd
(b) Chamfer
(c) -illet
(d) Co"ntersin$
A.#/,: (i) a (ii) c (iii) d (iv) b (v) a (vi) b (vii) a (viii) c (i*) a (*) b (*i) c
Choose the most appropriate answer o"t of the given alternatives: i)
#hen two graphic entities are at a constant distance apart along the length is commonly referred as (a) Concentricity
ii)
(b) Chord
(c) "adrant
(d) e!"ent
#hich of the following wo"ld be considered a primitive in a 3% solid modeling system+ (a) Cylinder
iv)
(c) &erpendic"larity (d) Chordality
0f a line intersects a circle at two points not passing thro"gh the center the line segment inside the circle is referred as (a) ,adial line
iii)
(b) &arallelism
(b) !"are
(c) ,homb"s
(d) pline
0f an octagon is circ"mscribed aro"nd the perimeter of a circle which of the following statements is true+ (a) The diameter of the circle is e!"al to the acrossthecorners meas"rement4 (b) The radi"s of the circle is e!"al to the acrosstheflats meas"rement4 (c) The diameter of the circle is e!"al to the acrosstheflats meas"rement4 (d) The radi"s of the circle is e!"al to the acrossthecorners meas"rement4
v)
To draw perpendic"lar from a given point & on line 56 name the point where the compass needle shall be placed first4 (a) & (b) 5 or 6 (c) Any convenient point along 56 (d) A point near the midpoint of &5 and &6
vi)
ine 56 is to be divided into 12 e!"al parts by geometric constr"ction4 #hich of the following statements concerning this proced"re is correct+ (a) ,ay line &6 drawn from 6 is the same length as 56 (b) A compass sho"ld be set to spread e!"al to one twelfth of the length of 56 (c) A line sho"ld be drawn from 5 to the 12th interval on ray line &6 (d) The ac"te angle formed by 56 and ray line &6 sho"ld be 378 or less
vii)
#hich of the following actions sho"ld be yo"r first step in constr"cting a s!"are geometrically when yo" are given only the length of its diagonal+ (a) ay o"t a hori9ontal line e!"al to one half of the given length (b) ay o"t a vertical line e!"al to one half of the given length (c) ay o"t a hori9ontal line e!"al to twice the given length (d) ay o"t a hori9ontal line e!"al to the given length
viii)
#hen two diameters of a circle are drawn at right angles to each other which of the following polygons will have all of the sides at ;8 to these diameters+ (a) A he*agon inscribed in a given circle (b) An octagon inscribed in a given circle (c) A pentagon inscribed in a given circle (d) A s!"are inscribed in a given circle
i*)
The incl"ded angle of a pentagon is (a) <=>
*)
(b) ?2>
(c) 17=>
(d) 112>
#hen a circle passes thro"gh three given points its center lies at the intersection of (a) The perpendic"lar bisector of the longest line and the perpendic"lar line drawn from the end of the shortest line (b) The perpendic"lar bisector of the shortest line and the perpendic"lar line drawn from the end of the longest line (c) The perpendic"lar bisectors of the lines that connect the points (d) The tangents drawn thro"gh each point
*i)
To draw a circle of a given radi"s which is also tangent to the two sides of a given angle the first step is to draw (a) Two nonparallel lines at right angles to the sides of the angle (b) Two lines that are parallel to the sides of the angle at a distance e!"al to one half of the given radi"s (c) Two lines that are parallel to the sides of the angle at a distance e!"al to the given radi"s (d) Two parallel lines at right angles to the sides of the angle
A.#/,: (i) b (ii) b (iii) a (iv) c (v) a (vi) c (vii) c (viii) c (i*) c (*) c (*i) c
4
SCALES 4-1 INTRODUCTION
0t is always convenient to represent obBects to their act"al si9e in drawings if their si9e permits4 eg4 A 277 mm diameter plain disc sho"ld be represented by a circle of 277 mm diameter on the drawing sheet4 This gives complete information of the obBect4 #hen drawings are prepared e!"al to the act"al si9e of the obBect the scale is said to be f"ll si9e scale and the drawings are said to be f"ll si9e drawings4 owever it is not always possible to ma$e drawings of all obBects s"ch as large machines b"ildings town plans etc4 to their act"al si9e4 #hen the obBects are of very large si9es the act"al dimensions of the obBect have to be red"ced on some reg"lar proportion to ma$e their drawings on the sheet4 eg4 A rectang"lar plot of si9e 2;m 5 17m can be represented by a rectangle of 2;7 mm 5 177 mm4 The scale selected in the present case is 1 mm D 7417 m4 0n other words 1 mm on the drawing represents 7417 m length of the obBect4 #hen the drawings are prepared smaller than the act"al si9e of the obBect the scale is said to be red"cing scale and the drawings are said to red"ce si9ed drawings4 imilarly very small obBects s"ch as gear mechanism of a wristwatch components of an electronics instr"ment atoms config"ration etc4 are shown by drawing them larger then their act"al si9e4 #hen the drawings are prepared larger than the act"al si9e the scale is said to be an enlarging scale and the drawings are said to enlarge si9ed drawings4 This is being ill"strated by drawing of a bottle4
cale 3:1
2:1
1:1
/nlarge i9e %rawings
-"ll i9e drawing
-ig4 41 @ 41
1:2
1:3
1:;
,ed"ce i9e %rawings
MULTIPLE CHOICE QUESTIONS
Choose the most appropriate answer o"t of the given alternatives: i)
-or drawing the components of a wrist watch the scale "sed is (a) ,ed"cing scale (b) -"ll scale
ii)
(b) /!"al to 1
The f"ll form of ,4-4 is
(c) 1F2;77
(b) 1F2
(c) 1F;777
(b) %iagonal scale (c) 0sometric scale
(d) cales of chords
(b) %iagonal of a s!"are (d) All of these
cale "sed for two system of "nits meas"rement is (a) &lain scale
*)
(d) 1F;7777
0n the diagonal scale the word GdiagonalG is "sed beca"se it is most s"itable for the meas"rement of (a) %iameter of a circle (c) ide of a pentagon
i*)
(d) 1F<2;7777
#hen meas"rements are re!"ired in three consec"tive "nits the appropriate scale is (a) &lain scale
viii)
(b) 1F<2;
An area of 3< s!"are $ilometer is represented by 1 s!"are centimeter on a map4 #hat is the ,4-4+ (a) 1F
