Drawing Standards, Protocols and Conventions Questions

Below are questions to test your knowledge and understanding of Drawing Standards, Protocols and Conventions.

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Questions

Question 1

Question 1

An exploded view of a record arm head is shown. a. Apply the British Standard convention for an external thread on the end elevation of the fixing screw. (1 mark)

b. Apply hatching to Section A-A in accordance with British Standard conventions. (5 marks)

Answers

Question 2

An orthographic drawing of a roof bracket used in the redevelopment is shown. A combination of chain and parallel dimensioning has been used in the drawing. a. State an advantage of using chain and parallel dimensions in orthographic drawings. (2 marks)

Chain Dimensions
Parallel Dimensions

Different methods of dimensional tolerancing have been applied to the drawing of the roof bracket. These are labelled method 1 and method 2.b. State the British Standard term for each method. (2 marks)

Method 1
Method 2

Answers

a.Chain

Clearly shows the dimension from any one feature to the next

Parallel

Avoids the risk of accumulated error
All sizes relative to a datum edge

b.Method 1

common tolerance

Method 2

symmetrical tolerance

Question 3

a. Calculate the maximum length of the threaded section of the fixing bolt. (1 mark)b. State the thread size of the fixing bolt. (1 mark)

Answers

(15-2) + 10 = 23

(Calculation not required) b.

Question 4

a. An incomplete enlarged sectional view of a wheel assembly is given. Using the information provided, complete the sectional view by adding appropriate hatching. (4 marks)

Answers

Question 5

The kickstand is connected to the scooter by an M5 countersink head screw. The length of the thread is 14mm. a. Apply to the views below the correct British Standard conventions for

the diameter of the bolt
the length of the thread
the convention for a thread. (4 marks)

The assembly technician downloads an orthographic drawing from the company network. The technician immediately notices some issues with the drawing. a. Identify five errors from the drawing that are incorrect with respect to British Standard conventions. (5 marks)

Answers

The projection symbol is incorrect
Measurements in inches.
Dimensioning through leader lines.
Dimension orientation.
The centre line on the hole is the wrong linetype.
Ends of the cutting plane should go from short dash to thick long dash.
Inconsistent projection line gap.

Question 6

A concept for a portable HD camera is shown below.

a. An incomplete enlarged sectional view of the camera is given below. Using the information provided on the supplementary sheets below, complete the sectional view by adding appropriate hatching. (5 marks)

Answers

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