This set of Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Manual Drawing and Drawing Standards – 2”.
1. Arrange the following statements. The given statements describe the process involved in engineering drawing.
i) Sketch the initial idea and create a geometric model.
ii) Exploring, understanding the problem and visualizing the idea.
iii) Applying the changes document a detailed drawing.
iv) Analyze, optimize and rectify the geometric model.
a) i, ii, iv, iii
b) ii, i, iv, iii
c) iv, iii, i, ii
d) i, ii, iii, iv
Explanation: In engineering drawing first we need to visualize the idea, then sketch and create a geometric model. Later, analyzing the geometric model we need to rectify the mistakes and optimize the sketch. Finally, applying the changes we need to document the drawings.
2. Why do we need engineering drawing standards?
a) To eliminate the originality/creativity of drafter
b) To modify and organize a way of drafting
c) To have effective communication of drawings
d) To eliminate mistakes
Explanation: The main role of having drawing standards is to have a common set of rules, it aids in the effective communication of the engineering drawings.
3. As per the B.I.S recommendations, the ratio of thin and thick lines width in a drawing sheet must be __________
a) >/= 1:2
b) </= 1:2
c) >/= 1:3
d) </= 1:3
Explanation: As per B.I.S 10714:2001, technical drawings-General principles of presentation, Line widths are decided, According to that ratio of thin and thick lines should not be less than 1:2 in a drawing.
4. Which of the following states the main application of pantographs in the technical drawing?
a) Holding the sheet in place
b) To draw the layered structures
c) To draw accurate angles without consuming much time
d) Helps in drawing curved structures
Explanation: Pantographs mechanism is applied in drafting in order to draw the accurate right angles without consuming much time and reducing the steps. This mechanism also helps in tracing and scaling line drawings.
5. What is the main advantage of manual drawing over CAD?
a) It can be easily stored and shared
b) Accurate and effective drawings can be produced
c) Take less time and need no instruments
d) No need of any advancement or maintenance of high-end technology
Explanation: In CAD drawings we need updated software and require maintenance of technology but in manual drawing, we just need drawings sheets and instruments, and we need no expensive technology.
6. In the manual drawing, mini drafter serves the purpose of set-square, T-square, and protractor.
Explanation: In the manual drawing, mini drafter is used to drawing parallel and inclined lines, it can serve the purpose of T-square, sets square, scale and protractor. They are effective and accurate. They are clamped to the drawing board on the top left corner.
7. Which of the following statements is true as per the standard metric sizes of the drawing sheet?
a) A1 is double the A0
b) A3 is half the A0
c) A0 is double the A1
d) A2 is half the A3
Explanation: As per I.S.O A0 has the area of one square meter and each smaller sheet is half the area of the previous sheet. Hence A0 is double the A1, A1 is double the A2, A2 is double the A3, A3 is double the A4.
8. Which of the following is pencil grade is used in general for lettering and object lines?
Explanation: In manual drawings medium grade pencils are used in general and hard grade are used for construction lines. For lettering and object lines we use H grade pencils. Grades generally indicate the hardness of the lead, the harder the lead the lighter the mark left.
9. In the manual drawing, which instrument is used to draw smooth curve passing through defined points?
c) French curve
d) Drawing templates
Explanation: In the manual drawing, we need to draw some required irregular curves or arcs where compass fails to work. In such situation French curves are used, it is also called a flexible curve as they can bend into any shape to draw a smooth curve passing through the number of points.
10. What is the use of T-squares in the manual drawing?
a) To draw curves
b) To draw concentric circles
c) To draw horizontal and vertical lines
d) To hold the sheet
Explanation: T-square is used in manual drawing to draw horizontal, vertical and diagonal lines. The horizontal part of T is used as a working edge which is used to draw lines on the sheet. It is generally made of wood or plastic and has a shape T.
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