Answer Key: Self-Test C-3.3

  1. Why are piping symbols used?
    1. to visually represent pipes, fittings, etc.
  2. State the two basic requirements for symbols.
    1. must be simple
    2. must be easy to draw
  3. Why are single-line symbols usually used in piping drawings?
    1. because they are simplest and easiest to draw
  4. Lengths of valves and fittings in single-line drawings are always drawn to scale.
    1. false
  5. Flanged or welded valves and fittings in double line drawings are always drawn to scale.
    1. true
  6. The joint in Figure 1 is
    1. flanged

 

Figure 1 Illustration for Question 6

 

  1. The joint in Figure 2 is
    1. butt welded

 

Figure 2 Illustration for Question 7

 

  1. The joint in Figure 3 is
    1. butt welded

 

Figure 3 Illustration for Question 8
  1. The joint in Figure 4 is
    1. screwed

 

Figure 4 Illustration for Question 9

 

  1. The joint in Figure 5 is
    1. flanged

 

Figure 5 Illustration for Question 10

 

  1. The symbol in Figure 6 is a
    1. tee

 

Figure 6 Illustration for Question 11

 

  1. The symbol in Figure 7 is a
    1. 90° elbow

 

Figure 7 Illustration for Question 12

 

  1. The symbol in Figure 8 is a
    1. union

 

Figure 8 Illustration for Question 13
  1. The symbol in Figure 9 is a
    1. gate valve

 

Figure 9 Illustration for Question 14

 

  1. The symbol in Figure 10 is a
    1. globe valve

 

Figure 10 Illustration for Question 15

 

  1. The symbol in Figure 11 is a
    1. check valve

 

Figure 11 Illustration for Question 16

 

  1. The symbol in Figure 12 is a
    1. pump

 

Figure 12 Illustration for Question 17

 

  1. The symbol in Figure 13 is a
    1. pressure-reducing valve

 

Figure 13 Illustration for Question 18

 

  1. The symbol in Figure 14 is a
    1. safety valve

 

Figure 14 Illustration for Question 19
  1. The symbol in Figure 15 is a
    1. control valve

 

Figure 15 Illustration for Question 20

 

  1. Draw the right view of the following front views.

Front view

Right view

a.

b.

c.

d.

e.

f.

g.

h.

i.

  1. Identify the symbols A to G in Figure 16.

 

Figure 16 Illustration for Question 21

 

    1. check valve
    2. strainer
    3. tee
    4. gate valve
    5. 90° elbow
    6. globe valve
    7. pump

 

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