Basic Engineering Drawing Set 16

Which is 'A2' size in the engineering system of paper size?
(A) 841mm x 1189mm
(B) 594mm x 841 mm
(C) 420mm x 594mm
(D) 210mm x 297mm
420mm x 594mm
Which is contained in title block of drawing sheet?
(A) Drawing space
(B) Scale
(C) Centering marks
(D) Grid reference
Scale
When a plane figure enclosed by more than four several straight lines is know as:
(A) Triangle
(B) Square
(C) Polygon
(D) Circle
Polygon
The lead becomes softer as the numeral before letter 'H' on pencil ?.. ?
(A) Increases
(B) Decreases
(C) Remain the same
(D) Wider
Decreases
Which is used in drawings to represent the edge of a solid object?
(A) Angle
(B) Vertex
(C) Surface
(D) Line
Line