Gen Ghulam

2. Which of the following instrument is made of thin strips of wood arranged in a line to form a rectangle and on which, the drawing is made? a) Mini – drafter b) Drawing Board c) Protractor d) Scale Answer: b Explanation: The drawing board is made up of thin sheets of seasoned softwood, arranged in a line so as to form a rectangle. Then it is fitted with two battens on the respective parallel sides of the board. The battens are attached with the help of screws.

3. Which of the following tools is used to draw horizontal lines? a) Mini – drafter b) Protractor c) T – square d) French curve Answer: c Explanation: T – squares are made up of hard wood, plastics, etc. It consists of two parts; stock and blade. The stock slides on the drawing board and the horizontal lines are drawn from the working edge on the side of the blade. The angle between the stock and the blade is 90˚.

4. Which of the following instrument can be used to draw accurate perpendicular lines, parallel lines and angular lines? a) Mini – drafter b) T – square c) Protractor d) Set square Answer: a Explanation: Mini – drafters are used to draw perpendicular lines, parallel lines and angular lines. They consist of blades, protractor head, double bar link mechanism, screw and clamp. The blades have markings corresponding to the engineering scale.

5. According to the Indian Standard Institute (ISI), which among the following designation has the size 1000 x 700 (in mm)? a) B0 b) B1 c) B2 d) B3 Answer: b Explanation: The designation B1 is 1000 x 700 mm in size whereas B0, B2 and B3 designations are 1500 x 1000 mm, 700 x 500 mm and 500 x 300mm respectively. These designations denote the dimensions of the drawing boards. Standard dimensions are used to simplify the production process.

6. Which is the most common tool used for drawing circles? a) French curve b) Mini – drafter c) Divider d) Compass Answer: d Explanation: Compass is used to draw circles. Its design is similar to the divider, except in compass there is a provision for the attachment of pencil or lead in one of the legs of the compass. The divider is used to measure and repeat the dimensions when they are repeated.

7. For drawing circles with a large radius, which of the following tool is used? a) Bow compass b) Lengthening bar compass c) Divider d) Protractors Answer: b Explanation: In a lengthening bar compass, there is a provision for increasing the radius of the circle greater than the total open length of the compass. This helps in drawing very large circles with the help of medium sized compasses.

8. Which of the following drawing tools is used by architects for making blueprints? a) Drawing Pencils b) Dusters c) Ink Pen d) Erasers Answer: c Explanation: Ink Pen is used to draw the blueprints by architects and draftsmen. They are used to draw lines onto the tracing paper. They are used for making the final drafts of the drawing made in pencil. Drawing pencils have generally leads which drawn on paper can be erased. This does not happen with the ink pen.

9. Which of the following drawing tool is not used to set the drawing sheet onto the drawing board? a) Drawing clips b) Drawing pins c) Divider d) Adhesive Tape Answer: c Explanation: Divider is a drawing tool used to replicate the dimensions when the dimensions are repeated. Drawing clips, drawing pins and adhesive tapes are used to attach the drawing sheet onto the drawing board. These attachments are temporary attachments and can be removed after the drawing is completed.

10. According to the Indian Standard Institution (ISI), what is the size of the designation A3 in mm? a) 420 x 297 b) 841 x 594 c) 1189 x 841 d) 297 x 210 Answer: a Explanation: The size of the designation A3 in mm is 420 x 297. The designations A0, A1, A2, A4 and A5 have sizes 1189 x 841 mm, 841 x 594 mm, 594 x 420 mm, 297 x 210 mm and 210 x 148 mm respectively. Standardizing helps in uniformity of the products all over the nation and will avoid local variations.

11. Which of the following drawing tool is used to transfer dimensions when there is a repetition of the dimensions? a) Compass b) Protractor c) Divider d) Mini – Drafter Answer: c Explanation: Divider is used to transfer dimensions when there is a repetition of the dimensions. It is the faster method than using a scale and then marking the dimension again. Protractors are only used to mark angles and the compass is used to draw circles.

12. Which of the following grades of leads is the hardest? a) 6B b) 5H c) 4B d) 6H Answer: d Explanation: 6H is the hardest grade of lead. The softest grade is 6B. HB is the medium soft grade. Generally, for educational purposes, 2HB pencils are used to make drawings. B is soft and H is medium hard. As the prefix number increases, the softness increases in B and the hardness increases in case of H.

13. For marking angles, which of the following drawing tool is used? a) Protractor b) Divider c) Compass d) French curve Answer: a Explanation: Protractors are used to mark angles from 0˚ to 180˚. There are markings on the semicircular area of the protractor. The least count of protractor for educational purpose is 1˚. The accuracy of marking angles is highest in protractor.

14. Using 30˚ – 60˚ – 90˚ and 45˚ – 45˚ – 90˚ set squares, which of the following angle is not possible to draw? a) 45˚ b) 30˚ c) 10˚ d) 90˚ Answer: c Explanation: Using the proper combination of both the set squares, one can draw multiple angles with a 30˚ angle minimum. If T-square and mini-drafter also used, the minimum accurate angle that we can draw is 15˚. Set squares are generally used to draw vertical and inclined lines.

15. Which is the instrument used to draw parallel lines fast? a) Set square b) Ruler scale c) Protractor d) Roll-n-draw Answer: d Explanation: Using roll-n-draw scales, we can draw parallel lines very accurately and fast. They are used to draw parallel lines in the horizontal direction, vertical direction and also in inclined planes. The general dimension of the roll-n-draw scale is 30 cm and 15 cm. The scale is rolled on the paper to achieve parallel lines.

16. How many battens will be there for a Drawing board? a) 1 b) 2 c) 3 d) 4 Answer: b Explanation: Generally drawing board has dimensions of 1000 x 1500, 700 x 1000, 500 x 700, 350 mm x 500 mm, and made of well-seasoned soft wood, so there would be no bending while life increases. And also if a size of drawing board increases widely then the board will be fabricated with another 1 or 2 battens.

17. The part that doesn’t belong to T-square is __________ a) Working edge b) Blade c) Stock d) Ebony Answer: d Explanation: Working edge and Stock are parts of T- square those which make 90 degrees with each other, the blade is the long bar that exists in T-Square. Ebony is part of Drawing board in which T-square is fitted to draw lines.

18. The angle which we can’t make using a single Set-square is ________ a) 45o b) 60o c) 30o d) 75o Answer: d Explanation: 45o can be drawn using 45o Set-square, and 30o, 60o can be drawn using 30o – 60o Set-square, but to draw 75o degrees we need both Set-squares. That is only if we keep 30o of set-square adjacent with 45o set-square we can get 75o. And also multiple angles can be achieved using protractor.

19. The angle which we can’t make using both the Set-squares is _____________ a) 15o b) 105o c) 165o d) 125o Answer: d Explanation: 15o can be made by keeping 45o and 30o adjacent to each other on the line perpendicular to the line for which 15ois made. Likewise for 105o and 165o also if we just change the alignment with the required line it possible. But to make 125o there is no such combination available for Set-squares.

20. Small bow compass can draw circles less than _____ mm radius. a) 25mm b) 30mm c) 35mm d) 40mm Answer: a Explanation: A normal Small bow compass is capable of drawing circles less than the 25mm radius. This is because of the arrangement of a screw in between the legs of the compass. But any other normal compass can’t give us perfect circles whose radius is less than 25mm.

21. Which is not the use of divider? a) To divide curved or straight lines into the desired number of equal parts b) To draw circles c) To transfer dimensions from one part of the drawing to another part d) To set-off given distances from the scale to the drawing Answer: b Explanation: Divider can be used for those purposes as mentioned in options. But we cannot use divider as a compass and even if we want the compass to be used as divider we can change the pencil part with needle attachment.

22. The cardboard scales are available in a set of _______ scales. a) six b) ten c) eight d) twelve Answer: c Explanation: The cardboard scales are available in a set of eight scales. They are designated from M1 to M8 which has scale of 1:1, 1:2.5, 1:10, 1:20, 1:50, 1:200, 1:300, 1:400, and 1:1000. These are standard scales used.

23. _________ is used to draw curves which are not circular. a) Compass b) Protractor c) French curves d) Pro circle Answer: c Explanation: French curves are used for drawing curves which can’t be drawn with a compass. A faint freehand curve is first drawn through the known points. Longest possible curves exactly coinciding with the freehand curve are then found out from the French curve. Finally, a neat continues curve is drawn with the aid of the French curve.

24. The areas of the two subsequent sizes of drawing sheet are in the ratio ____ a) 1:5 b) 1:4 c) 1:2 d) 1:10 Answer: c Explanation: A successive format size (from A0 to A5) is obtained by halving along the length or doubling along the width. So the areas of the two subsequent sizes are in the ratio 1:2. Likewise in reverse order (from A5 to A0), the ratio will be 2:1.

25. The sizes from A0 to A5 increases. a) True b) False Answer: b Explanation: The sizes from A0 to A5 decreases, A5 (148 mm x 210 mm), A4 (210 mm x 297 mm), A3 (297 mm x 420 mm), etc. A successive format size is obtained by doubling along the width or halving along the length.

26. The increase in hardness is shown by the value of the figure put in front of the letter H, 2H, 3H, and 4H etc. a) True b) False Answer: a Explanation: Letters HB denote the medium grade where the increase in hardness is shown by the value of the figure put in front of the letter H, viz. 2H, 3H, and 4H etc. Similarly, the grade becomes softer according to letter B, 2B, 3B and 4B etc.

27. What is the next size of 210 mm x 297 mm in drawing papers? a) 148 mm x 210 mm b) 297 mm x 420 mm c) 420 mm x 594 mm d) 105 mm x 148 mm Answer: b Explanation: 210 mm x 297 mm is A4 size, next one is A3 (297 mm x 420 mm), which came doubling along the width. And the next size is obtained by doubling the width i.e. A2 (420 mm x 594mm) and so on.

28. The Grade becomes ______ according to the figure placed in front of the letter B, 2B, 3B, 4B etc. a) harder b) lighter c) darker d) softer Answer: d Explanation: The increase in hardness is shown by the value of the figure put in front of the letter H, 2H, 3H, and 4H etc. Similarly, the grade becomes softer according to the figure placed in front of the letter B, 2B, 3B, and 4B etc.

29. Parabolic curves is not used in ________ a) Arches b) Bridges c) Sound reflectors d) Boring

30. By an equation how can you define a cycloid? a) y = a(1-sin α) b) x = a(α – cos α) c) x = a(α – sin α) d) x = a(1- sin α)

31. When the point is within the circle, the curve is called an ________ a) Inferior trochoid b) Superior trochoid c) Inscribed trochoid d) Superior trochiod Answer: a Explanation: Trochoid is a curve generated by a point fixed to a circle, within or outside its circumference, as the circle rolls along a straight line. The curve generated below shows us the inferior trochoid.

32. Figure below represents a section (shaded) obtained due to intersection by a plane that is parallel to the axes of the cones, what it the section called? a) Parabola b) Hyperbola c) Ellipse d) Cycloid Answer: b Explanation: Hyperbola concept originated in Greek, can be defined as a set of points in a plane whose distances to two fixed points in the plane have a constant difference. It is formed by the intersection of a plane with a right circular cone. Equation of parabola: x2/a2 – y2/b2 = ±1.

33. For eccentricity in ellipse (e) which relation is correct? a) e < 1 b) e = 1 c) e > 1 d) e = ∞ Answer: a Explanation: Eccentricity can be defined as a parameter associated with every conic section. It can be thought of a measure of how much the conic section deviates from being circular. When (e < 1 Ellipse), (e = 1 Parabola), (e > 1 Hyperbola), (e = ∞ straight line), (e = 0 Circle).

34. When a uniform and flexible chain hangs from two pegs, its weight is uniformly distributed along its length. The shape it takes is called a _________ a) Catenary b) Parabola c) Hyperbola d) Ellipse Answer: a Explanation: When a uniform and flexible chain hangs from two pegs, its weight is uniformly distributed along its length. The shape it takes is called a catenary. The catenary curve has a U-like shape, superficially similar in appearance to a parabola, but it is not a parabola. The catenary is also called the alysoid, chainette, or, particularly in the materials sciences, funicular. This figure blow represents a catenary and a parabola.

35. A curve defined by an equation x2/a2 + y2/b2 = 1 is known as ________ a) Ellipse b) Directrix c) Parabola d) Hyperbola Answer: a Explanation: A plane curve such that the sums of the distances of each point in its periphery from two fixed points, the foci, are equal. It is a conic section formed by the intersection of a right circular cone by a plane that cuts the axis and the surface of the cone.

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