Chap 1: Basics of Engr Drawing

Question 1

Enumerate the 17 Drawing Instruments

Answer 1

1. Drawing Board
2. Minidrafter
3. Precision Instrument Box
4. 45° & 30°-60° Set Squares
5. Engineers’ scales
6. Protractor
7. French Curves
8. Drawing Pins/Clips
9. Drawing Papers
10. Pencils
11. Erasers
12. Erasing Shields
13. Templates
14. Dusters
15. Flexible Curves
16. Tracing Paper
17. T-Square

Question 2

What is inside a Precision Instrument Box?

Answer 2

1. Large Compass
2. Small Spring Compass
3. Large Duvider
4. Small Spring Divider
5. Inking Pen
6. Extension Bar 4 Large Compass
7. Inking Attachments 4 Compass

Question 3

A wooden board usually made from well-seaeoned teak, blue pine, oak or red cedar?

Answer 3

Drawing Board

Question 4

Standard sizes of Drawing Boards?

Answer 4

> D0 (1500x1000)
D1 (1000x700)
D2 (700x500)
D3 (500x350)

Question 5

In the British System, what were the Drawing Board sizes called?

Answer 5

> Imperial (31”23”)
Half-Imperial (23”16”)

Question 6

Consists of 2 scales that are permanently fixed at right angles to each other.

Answer 6

Minidrafter

Question 7

Used to draw circles & arcs with large radii

Answer 7

Large Compass

Question 8

Used to draw circles of small radii

Answer 8

Small Spring Compass

Question 9

2 Types of Small Spring Compass

Answer 9

> Type I (nut is on leg)
Type II (nut is between legs)

Question 10

It’s similar to large & small compasses but the lead is replaced by needle point. Used to mark & measure distances.

Answer 10

Divider
> Large Divider
> Small Spring Divider

Question 11

Right-angled triangles

Answer 11

Set Squares (45° & 30°-60°)

Question 12

Used to mark required measurements on lines.

Answer 12

Engineers’ Scales

Question 13

Used to measure angles

Answer 13

Protractor

Question 14

Used for drawing curves other than circular arcs

Answer 14

French Curves

Question 15

Used to fix the drawing sheet to the drawing board

Answer 15

Paper Clips/Pins or Spring Clips

Question 16

Should be thick, smooth, strong, tough & uniform in thickness. Fibre should not disintegrwte when an eraser is used.

Answer 16

Drawing Papers

Question 17

Standard Sizes of Drawing Paper

Answer 17

> A0 (8411189)
A1 (594841)
A2 (420594)
A3 (297420)
A4 (210297)
A5 (148210)

Question 18

Are convenient because they do not need sharpening

Answer 18

Clutch Pencils

Question 19

Types of Pencils

Answer 19

For Freehand & Lettering:
> F (Firm)
> HB (Medium Hard)

For Drafter or Set Squares
> H (Moderately Hard)
> 2H (Hard)

Question 20

Used to erase unwanted lines

Answer 20

Erasers

Question 21

Used to protect the drawing from getting erased while erasing unwanted portions

Answer 21

Erasing Shields

Question 22

Flat sheets with circles, triangles, squares, & ellipses of different sizes

Answer 22

Templates

Question 23

Clean soft piece of cloth. Used to flick eraser crumbs & clean protracto, set squares, minidrafter.

Answer 23

Dusters

Question 24

A rubber rod that can be bent to match various plotted points that are not on a straight line.

Answer 24

Flexible Curves

Question 25

Semi-transparent paper used to trace an existing pencil or ink drawing

Answer 25

Tracing Paper

Question 26

Consists of a wooden blade & stock.

Answer 26

T-Square

Question 27

Contains the name, corresponding dates, the projection symbol for the drawing, the scale, the title and the drawing number.

Answer 27

Title Block

Question 28

One of the most convenient ways to communicate when discussing about machines & their components

Answer 28

Engineering Drawings

Question 29

A type of drawing that is technical in nature and is used to fully and clearly defi ne the requirements for manufacturing objects.

Answer 29

Engineering Drawing

Question 30

It is often called the universal language of engineers.

Answer 30

Engineering Drawing