Q.1: Choose the correct answer of the following :
(a) The size of A2 drawing sheet recommended by the Bureau of Indian Standard is
(i) 297mm × 420mm
(ii) 420mm × 594mm
(iii) 594mm × 841mm
(iv) 148mm × 210mm
Answer
(ii) 420mm × 594mm
Explanation: A2 size per BIS (ISO 216) is 420mm × 594mm.
(b) Which one of the following is not a reducing scale?
(i) 10:10
(ii) 10:100
(iii) 0.2:10
(iv) 2:10
Answer
(i) 10:10
Explanation: 10:10 (1:1) is full scale, not reducing (others are smaller than actual).
(c) Long dashed dotted narrow lines are used to show
(i) dimension line
(ii) extension line
(iii) hidden edges
(iv) centreline
Answer
(iv) centerline
Explanation: Indicates symmetry axes or centerlines in drawings.
(d) The TV of a line is in true length and FV as point, the line is
(i) parallel to VP and perpendicular to HP
(ii) parallel to both VP and HP
(iii) parallel to HP and inclined to VP
(iv) parallel to HP and perpendicular to VP
Answer
(i) parallel to VP and perpendicular to HP
Explanation: True length in TV and point in FV means perpendicular to HP, parallel to VP.
(e) Symbol used showing the diameter in dimensioning is
(i) α
(ii) $\theta$
(iii) Φ
(iv) R
Answer
(iii) Φ
Explanation: Φ denotes diameter in technical drawings.
(f) TV of a square plane parallel to HP and perpendicular to VP is
(i) Straight line
(ii) Ellipse
(iii) Square
(iv) Point
Answer
(i) Straight line
Explanation: Edge view of a plane parallel to HP appears as a line.
(g) When a cone is cut by a plane inclined to its base, and on removing the top portion of the cone, the remaining bottom portion is called
(i) Truncated of a cone
(ii) Frustum of a cone
(iii) Regular-prism
(iv) Irregular-cone
Answer
(ii) Frustum of a cone
Explanation: Remaining part after cutting is called a frustum.
(h) Isometric projection
(i) is larger than the object
(ii) is equal to object
(iii) is smaller than the object
(iv) can be either larger or smaller
Answer
(iii) is smaller than the object
Explanation: Scaled at ~0.816, making it smaller than the object.
(i)TTT command is used for drawing
(i) line
(ii) ellipse
(iii) circle
(iv) square
Answer
(iii) circle
Explanation: In AutoCAD or other drafting tools, TTT is a custom command (commonly a shortcut for Tangent-Tangent-Tangent circle creation).
(j) CAD stands for
(i) computer aided drawing
(ii) computer aided design
(iii) computer aided driving
(iv) cat and dogs
Answer
(ii) computer aided design
Explanation: CAD means Computer-Aided Design for technical modeling.
Q.2
(a) A point Q is situated in first quadrant. It is 40 mm above HP and 30 mm in front of VP. Draw its projections and find its shortest distance from intersection of HP, VP and auxiliary plane.
Answer:
(b) Draw the locus of a point P which moves in a plane in such a way that the ratio of its distances from a fixed point F and a fixed straight line AB is always 2/3. The distance between the fixed point F and fixed straight line is 50 mm. Also draw a tangent and normal on a point on the locus at a horizontal distance of 55 mm from the fixed straight line.
Answer:
Q.3
Construct a vernier scale of R.F. = 1/20 to read meters, decimetres and centimetres, long enough to read up to 4 meters. Show a distance of 2.38 meters on the scale.
Answer:
Q.4
A line AB measuring 75 mm long has one of its ends 50 mm in front of VP and 15 mm above HP. The top view of the line is 50 mm long. Draw and measure the front view. The other end is 15 mm infront of VP and is above HP. Determine the true inclination of line with HP and VP.
Answer:
Q.5
A rectangular plate of side 60 mm × 30 mm is resting on its shorter side in the VP and inclined at 30° to the HP. Project its top view if its front view is a square of 30 mm long sides.
Answer:
Q.6
A pentagonal pyramid, side of base 25 mm and height 60 mm has one of its slant (triangular) faces on the H.P. and the edge of base contained by that face makes an angle 30° degree to the V.P.Draw its projections.
Answer: Although the data will change, it still helps in understanding the concept
Q.7
A pentagonal prism of base side 30 mm and axis length 60 mm is resting on HP on one of its rectangular faces, with its axis perpendicular to VP. It is cut by a plane inclined at 40° to VP and perpendicular to HP and passing through a point 25 mm from rear base of the prism. Draw its top view, sectional front view and true shape of section.
Answer:
Q.8
Isometric view of an object is given below. Draw three views of this object by first angle projection method.
Answer: Although the data will change, it still helps in understanding the concept
Q.9
Draw the isometric projection of a hexagonal pyramid of 20 mm base edges and height 60 mm long when it rests on its base on HP with two of its opposite sides of base parallel to VP.
Answer: Although the data will change, it still helps in understanding the concept