TECHNICAL DRAWING QUESTION AND ANSWERS BATCH ONE

 

1.      Define the word Technical drawing.

T-Drawing :

2.       why do we learn Technical drawing (at least four points)

Answer:

Technical drawing is universal language. More people can understand drawing easily and quick than work.

Technical drawing communicates the idea of shape, form and dimension of the article being made.

Technical drawing provide a good knowledge for vocational student who wishes to be employed in industries.

 

3.      What does the following abbreviation stand for?

i)                 ISO

ii)                BS

Answer

i)                 ISO :  INTERNATIONAL STANDARD ORGANIZATION

ii)                BS:   BRITISH STANDARD

 

4.      Write the size of the following paper used in Technical drawing.

                                     I.          A0

                                   II.          A1

                                  III.          A2

                                  IV.          A3

                                   V.          A4

                                  VI.          A5

Answer:

i)                 A0:= 841mm × 1189mm

ii)                A1: =841mm × 594mm

iii)               A2:=594mm × 420mm

iv)               A3:=420mm × 297mm

v)                A4:= 297mm × 210mm

vi)               A5:= 210mm × 148mm

 

5.      Mention area where Technical drawing are applicable or widely used (at least three areas)

 

Answer:

Technical drawing are widely applicable In:

Industries.

Artitecture

Building construction.

6.      Write at least ten technical drawing instruments with their uses.

 

Answer:

 

7.      Use simple sketch to illustrate two types of drawing sheet layout.

8.      In technical drawing we have three types of pencils, mention them.

9.      Mention two style of lettering in Technical drawing.

ANSWER:

                           i.          Inclined style

                          ii.          Vertical style

 

10.   What are important features to be shown in Title block?

ANSWER:

                           i.          Your name: (Drawn by:)

                          ii.          Title of drawing

                         iii.          Scale

                         iv.          Date

                          v.          Drawn number

                         vi.          Dimension

                       vii.          Your class

11.   What is the meaning of the word “Bisect” in Technical drawing.

ANSWER:

Bisect means to divide to two equal parts.

 

 

12.   What does the word “Perpendicular line” means.

ANSWER:

Perpendicular line: this is the line that make 90 degree with another line.

 

 

13.    A line of 45mm length lay horizontally, draw the line and divide it to 4 equal parts.

14.   Line AB inclined at an angle of 30 degree, draw the line and bisect it.

15.    Draw parallel line to a line AB of 67mm long inclined at an angle of 30 degree, With a distance of 10mm from each other.

 

Questions that appears in CBA VETA EXAMS:

1.      A) List seven important features written in title block.            (CBA june 2015 Level III, Qns. 1)

b) Construct the following types of line.                           

                                         i.          Thin short dashes or dash line

                                        ii.          Thin long chain or centre line

                                       iii.          Thick long chain or section line.

2.      A)   Mention the two types of paper layout.                              (CBA june 2015 Level III, Qns. 7)

b)      Mention five ISO drawing paper and give their corresponding dimension.

3.      Construct the following types of line.                           

                                       iv.          Thin short dashes or dash line

                                        v.          Thin long chain or centre line

                                       vi.          Thick long chain or section line.

4.      Draw the following types of line:  (Lii Qns no. 3d nov 2014)

i.                 Hidden detail line

ii.                Outline

iii.               Section plane line

iv.               Centre line

 

5.      What do the abbreviation ISO and BS stand for?

Ii) What is the total area of AO sheet of drawing?

iii) What is the difference between  a Potrait and a Land Scape layout? Support your answer with sketches.

(Lii Qns no. 4 nov 2014)

6.      Draw a title block and print six important features by using capital letter of 6mm height. (Lii Qns no. 7 nov 2014)

7.      I) Construct an angle of 90 by using a compass, bisect the angle between 90 and 120 to obtain an angle of 105. (Lii Qns no. 1d nov 2014)

ii) With a 45 -45 set square draw sloping line 90mm long and bisect it. (Lii Qns no. 1d nov 2014)

iii) What is advantage of using adjustable set square over using the one which can not be adjusted.

8.      A) Construct the following type of lines:  (CBA LII August 2020)

i)                 Thick long chain or cutting plane line

ii)                Thin long chain or centre line

iii)               Dash line or hidden line

iv)               Thick line or outline

v)                Diagonal line

b) Construct the following angles by using a compass and ruler only.

   i) 67¹/₂ degree

ii) 22¹/₂ degree

9.       

SCALE:

1.      What is the meaning of the word “SCALE”?

2.      Mention three way of scale classification.

ANSWER:
i) Full scale.  = 1:1

ii) Enlargement scale: =2:1, 5:1, 100:3

iii) Reduced scale. =1:5, 1:100

3.      What are three ways of representing a scale?

            ANSWER:

i)                 Fraction: 1/30

ii)                Using an equal sign (=) : 1=3

iii)               1:3

4.      What are three types of scale?

  ANSWER

i)                 Plain scale

ii)                Diagonal scale

iii)               Veneer scale

5.      Construct a scale of 1:50 to read metre and decimeters long enough to measure 6m. Mark on it a distance of 5.5m

QUESTION APPEARED IN CBA PAST PAPERS

1.      I) Draw a line of 10m in a scale of 1:100

iii)               Draw  a line of 5m in a scale of 1:50

2.      Draw the figure below in a scale of 2:1

3.     

CIRCLE:

 

1.      Define the word Circle.

ANSWER:

Circle: Is a round plane figure whose boundary (the circumference) consist of point Equidistant from a fixed point (the centre).

 

2.      Explain eight parts of circle.

ASNWER:

                                     i.          Circumference: Is actual line of a circle.

                                    ii.          Arc: Is part of circumference of the circle.

                                   iii.          Chord: Is straight line with each end touching the circumference.

                                   iv.          Diameter: Is the longest chord of the circle. OR

Is the line passing through the centre of the circle with both end touching the circumference.

                                    v.          Radius: Is straight line from the centre of the circle to the circumference.

                                   vi.          Sector: Is a part of circle enclosed by two radii and the arc joining the end of the two radii.

                                 vii.          Segment: Is the part of the circle enclosed by a chord and the arc touching the end of the chord.

                                viii.          Tangent: Is the line touching a circle at one point only.

 

3.      Draw a tangent line to a circle “O” of radius 32mm, from point “S” which is 40mm Northward from the centre.

4.      Draw a tangent line at any point in a circle of 30mm radius.

5.      Draw internal tangent between two circle, circle “H” of radius 25mm and circle “S” of radius 35mm where distance from centre H to S is 90mm.

 

6.      Draw external tangent between two circle, circle “H” of radius 25mm and circle “S” of radius 35mm where distance from centre H to S is 90mm.

 

7.      Construct circumscribing circle to a triangle ABD in which AB=70mm; BD=65mm  and  AD =45mm.

8.       

 

QUESTION THAT APPEAR IN CBA VETA EXAMS.

1.      With the aid diagram show the difference between concentric and eccentric circle (CBA JUNE 2016 level III, Qns: 4)

2.      Clearly define the following term:   (CBA JUNE 2016 level III, Qns: 2) 

                                                  i.          Circumference

                                                ii.          A chord

                                               iii.          A tangent

                                               iv.          Sector

                                                v.          An arc

                                               vi.          Segment

                                              vii.          Diameter

3.      Draw concentric circles with the radii 40mm, 60mm and 100mm (Qns No. 7a)

 

4.      A) i) What is meant by the term “CIRCLE”? (CBA LII August 2020, Qns: 7)

ii) Mention ten parts of circle.

B) Draw a circle and indicate all parts mentioned in question 4a (ii) above

5.      A) What are three types of pictorial drawing?

b) Construct common interior tangent to two equal circles, centers Q and Q1, given the radius of the circle is 30mm and the distance between centers Q and Q1 is 100mm.

6.       

ELLIPSE:

1.    DEFINE the term “Ellipse”

Answer:

Is a round figure which has an oval shape.

 

2.    Ellipse consist of two axis, Mention them.

ANSWER:

                                     i.          Major axis

                                    ii.          Minor axis

3.    Draw an ellipse between two concentric circle of diameter 50mm and 70mm.

4.    What are difference between concentric and eccentric circle.

5.    Draw the ellipse of major axis of 80mm and minor axis of 40mm by using rectangular method.

6.    Draw the ellipse of major axis of 80mm and minor axis of 40mm by using rectangular method.

7.    Draw an ellipse within a square of 65mm by using arc method.

 

QUESTIONS THAT APPEAR IN CBA VETA EXAM

1.      Draw the ellipse of major axis of 90mm and minor axis of 60mm.  (CBA VETA june 2016 LEVEL III, Qns: 5)

2.      Use concentric method to construct an ellipse given the major axis 100mm and the minor axis 50mm.

3.      A) (i) Define the term Ellipse.                                (CBA VETA Lii August 2020, Qns. 5)

      (ii) Explain two diameter of an ellipse.

b) Construct ellipse given major axis as 100mm and 50mm as minor axis by using rectangle method.

4.       

CONSTRUCTION OF PLANE FIGURE:

1.      Define the following term.

                              i.          Polygon

                            ii.          Triangle

 

ANSWER:

                       i.          Polygon: Is closed plane figure with three or more straight side.

                      ii.          Triangle: Is closed plane figure with three side and their interior angle sum up exactly 180 degree.

2.      Describe two types of polygon.

ANSWER:

REGULAR POLYGON:  It’s a polygon with all its side equal in length and each of the internal angle format at the corner are equal in magnitude.

IREGULAR POLYGON: When each side are difference in length.

3.      Draw an hexagon within a square of 60mm.

4.      Draw a hexagon with a set square of 40mm side.

5.      c) Construct a pentagonal of side 25mm.

6.       

7.      Mention the types of triangle you know.

ANSWER:

                           i.          Equilateral triangle:  Have all its side are equal and all three angle are equal always 60 degree.

                          ii.          Isosceles Triangle: Have two side and two angle are equal.

                         iii.          Right angle: One angle is right angle.

                         iv.          Scalene Triangle: Have no equal side with no equal angle.

 

QUESTIONS THAT APPEAR IN CBA VETA EXAMS

1.      A) Draw a regular hexagon within a circle of radius 30mm.   (CBA june 2016, level III, Qns: 6)

b) Draw a regular hexagon with a set square whose base is 30mm.

             2.  Construct regular octagon within a square of side 80mm long. Show all steps.

                 b) Construct a regular hexagon of base 40mm long by using a set square.   

 

ORTHOGRAPHIC PROJECTION:

1.      Draw the figure below in orthographic projection looking in direction of A

2.       

CBA QUESTIONS

1.      Construct a cone with its base 40mm and height of 60mm in first angle orthographic projection. (CBA june 2016, level III, Qns: 3)

2.      Construct a cone where its base has a siameter of 40mm and height of 60mm in the first angle projection. (Qns N0. 5)

3.      Draw a symbol for third angle orthographic projection.  ((Lii Qns no. 5 nov 2014)

b) A cylindrical object has a height of 80mm, outside diameter of 60mm and thickness of 10mm. Draw the object in third angle orthographic projection.

ISOMETRIC PROJECTION:

1.      What are three ways of drawing pictorial drawing?

Answer:

i)                 Isometric

ii)                Oblique

iii)               Perspective

 

2.      What is the meaning of Isometric drawing?

Answer:

Isometric drawing: is a pictorial representation of an object in which all three dimension are drawn at full scale. The term isometric means “equal measurement”.

3.      Draw the figure below in isometric projection.

4.       

QUESTIONS THAT APPEAR IN CBA VETA PAST PAPERS:

5.      A rectangular box of 80mm long, 70mm width and 60mm height has drilled through a base of diameter 50mm and is located at the centre of surface (70 ×80mm) Draw the box in Isometric projection. (Lii Qns no. 5 nov 2014)

OBLIQUE PROJECTION:

1.      What is an oblique projection?

2.      What are two types of oblique projection? Use simple drawing to explain your answer?

3.      Draw the given figure below in oblique projection.

i)                

 

4.      Draw the orthographic projection below into an oblique projection.

5.