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Parents Pricing Home NSC Mechanical Technology Welding and Metalwork Developments and templates A steel ring must be manufactured using a 60 x 60 mm square steel bar
A steel ring must be manufactured using a 60 x 60 mm square steel bar - NSC Mechanical Technology Welding and Metalwork - Question 5 - 2021 - Paper 1 Question 5
View full question A steel ring must be manufactured using a 60 x 60 mm square steel bar. The ring has an outside diameter of 960 mm.
5.1.1 Calculate the mean diameter of the ring.
5... show full transcript
View marking scheme Worked Solution & Example Answer:A steel ring must be manufactured using a 60 x 60 mm square steel bar - NSC Mechanical Technology Welding and Metalwork - Question 5 - 2021 - Paper 1
5.1.1 Calculate the mean diameter of the ring. Only available for registered users.
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To calculate the mean diameter of the ring, we subtract the thickness of the steel bar from the outside diameter. Given the outside diameter is 960 mm and the thickness is 60 mm:
e x t M e a n D i a m e t e r = e x t O u t s i d e D i a m e t e r − e x t P l a t e T h i c k n e s s = 960 m m − 60 m m = 900 m m ext{Mean Diameter} = ext{Outside Diameter} - ext{Plate Thickness} \\
= 960 mm - 60 mm \\
= 900 mm e x t M e an D iam e t er = e x t O u t s i d eD iam e t er − e x t Pl a t e T hi c kn ess = 960 mm − 60 mm = 900 mm
5.1.2 Calculate the mean circumference of the ring (round off answer to the nearest whole number). Only available for registered users.
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The mean circumference of the ring can be calculated using the formula:
e x t M e a n C i r c u m f e r e n c e = e x t π i m e s e x t M e a n D i a m e t e r = e x t π i m e s 900 m m e x t a p p r o x i m a t e l y = 2827.43 m m e x t R o u n d e d o f f t o t h e n e a r e s t w h o l e n u m b e r : 2827 m m ext{Mean Circumference} = ext{π} imes ext{Mean Diameter} \\
= ext{π} imes 900 mm \\
ext{approximately} = 2827.43 mm \\
ext{Rounded off to the nearest whole number: } 2827 mm e x t M e an C i rc u m f ere n ce = e x t π im ese x t M e an D iam e t er = e x t π im es 900 mm e x t a pp ro x ima t e l y = 2827.43 mm e x t R o u n d e d o ff t o t h e n e a res tw h o l e n u mb er : 2827 mm
5.2.1 Spot weld Only available for registered users.
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The weld symbol for a spot weld is represented by a series of small circles connected by a line.
5.2.2 Projection weld Only available for registered users.
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The weld symbol for a projection weld consists of a box with a dot or multiple dots at the locations of the projections.
5.2.3 Seam weld Only available for registered users.
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The weld symbol for a seam weld is indicated by a series of overlapping lines.
5.2.4 Foil seam weld Only available for registered users.
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The weld symbol for a foil seam weld is represented by two thin lines, typically shown parallel.
5.2.5 Flash or resistance weld Only available for registered users.
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The weld symbol for a flash or resistance weld typically shows two lines with a wavy pattern connecting them.
5.3 Identify the templates shown in FIGURES 5.3.1–5.3.3 below. Only available for registered users.
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5.3.1 - Flange template
5.3.2 - Strip template
5.3.3 - Web template
5.4 Name THREE hand tools that a template maker uses. Only available for registered users.
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Hand saws
Chisels
Steel rule
5.5 Name TWO machines used in the template loft. Only available for registered users.
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Drilling machine
Circular saw
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