This set of Civil Engineering Drawing Multiple Choice Questions & Answers (MCQs) focuses on “Lines, Lettering and Dimensioning”.
1. Which grade of pencil is used for drawing arrowheads?
Explanation: Arrowheads resembles the extent of dimensions. It should be sharply defined and uniform throughout the drawing. Generally, 3 mm in length is used. For such precision small diameter pencils are used, hence 2H is used as arrowheads.
Explanation: Centre line is used to indicate the axes of cylindrical, conical or spherical objects. Also to show the centre of circle and arcs. Long, thin chain line composed of alternate long and dot spaces approximately 1mm apart. Long dashes are about 9 to 12mm apart.
Explanation: Short- break lines usually shortens an object that otherwise would be longer at a real world scale. These are continuous, thin, heavy, semi-parallel, wavy lines. They are drawn free hand for consistent shaped objects and are used to show short break or irregular boundaries.
Explanation: Outlines represents a general sketch indicating only the main features, aspect of something under discussion. These are continuous thick, wide lines used to represent visible edges and surface boundaries of objects. Also known as principal lines.
5. What does the “Single-Stroke” lettering mean?
a) Cursive writing
b) Uniformity in letters as obtained in one stroke of the pencil
c) Writing in one stroke without lifting the pencil
d) Writing only with hard, small diameter lead-pencil
Explanation: Single-Stroke lettering resembles uniformity in line thickness which can be obtained in one stroke. One stroke resembles the uniform lead diameter i.e. during lettering the thickness of letters should match each other.
6. Which line is drawn to make the section evident?
a) Long-break line
b) Chain thick
c) Border line
d) Hatching line
Explanation: These lines are drawn to make the section bold or visible. These are continuous thin lines and are generally drawn at an angle of 45 degree to the main outline of the section. This figure shows hatching line (inclined lines), it can be any line.
Explanation: Cutting plane lines represents a plane or planes in which a sectional view is taken. The arrow indicates the direction of cutting the section. Here the upper or front portion of the section will be visible (in the diagram above).
8. What is the slope of inclined letters with the horizontal?
a) 75 degree
b) 65 degree
c) 45 degree
d) 85 degree
Explanation: Inclined letters are Single-stroke letters which lean to the right making a slope of 75 degree with the horizontal as per the guidance of Indian Standards. Also known as Italic lettering. Not recommended for beginners until you have mastered in vertical lettering. Inclined and vertical lettering should never appear on the same drawing.
9. In lettering ‘A’ the height of capital letter is divided in how many parts?
Explanation: In lettering ‘A’ type, the height of the capital letter is divided into 14 parts while in lettering ‘B’ type it is divided into 10 parts. The height of letters and numerals for engineering drawing can be selected from 2.5, 3.5, 5, 7, 10, 14 and 20 mm according to drawing size.
10. The length to height ratio of a closed filled arrow head is?
Explanation: This arrow is called as closed filled arrow head as it is hatched and closed. Due to bold appearance and hence good visibility and uniform ratio makes it a good arrow for use.
Open closed closed filled oblique stroke
11. Guidelines for dimensions at international level on a drawing is controlled by __________
a) Bureau of Indian Standards
b) Corporate drafting standards
Explanation: ISO (International Organization for Standardization), this is a World Wide organization that creates engineering standards, dimensions with approximately 100 participating countries. ANSI creates standards for North America, BIS for India, CDS for small company.
Explanation: The above symbol is used for diameter of circles irrespective of the units. The diameter symbol ⌀ is distinct from the empty set symbol ∅, from an (italic) uppercase phi Φ, and from the Nordic vowel ∅.
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