rk6-2 task 1

Question 1

templates are generally made on

1. 21 mm (½”) plywood
2. steel plate
3. drawing paper
4. fiberglass

Answer 1

c. drawing paper

Question 2

what is a bend allowance?

1. degree of pipe bend allowed
2. additional length of pipe needed for a bend
3. room allowance for a pipe bend
4. amount of offset needed

Answer 2

b. additional length of pipe needed for a bend

Question 3

calculate the bend allowance for an 80° bend with a radius of 10”.

1. 4”
2. 6”
3. 14.8325”
4. 20”

Answer 3

c. 14.8325”

L = R x D x 0.1745

10” = 254mm

L = 254 x 80 x .01745

L = 354.584

L = Bend allowance

R = Radius of the bend (to the centre line of the pipe)

D = number of degrees of the bend

Question 4

find the total length of the pipe needed to complete a bend of 71° with a radius of 301 mm and the legs of 1.1 m and 2.1 m.

1. 1.4 m
2. 2.6 m
3. 3.1 m
4. 4.4 m

Answer 4

d. 4.4 m

Question 5

the length of the stretch-out is equal to

1. the outside diameter of the pipe
2. the circumference of the pipe
3. the inside diameter of the pipe
4. two times the outside diameter of the pipe

Answer 5

b. the circumference of the pipe

Question 6

which views are used in parallel line development?

1. isometric and cabinet
2. oblique and cavalier
3. detail and assembly
4. plan an elevation

Answer 6

d. plan and elevation

Question 7

when you calculate the stretch-out you need to use the

1. outside diameter
2. inside diameter
3. nominal radius
4. inside radius

Answer 7

a. outside diameter

Question 8

calculate the stretch out of a pipe with a diameter of 100 mm.

1. 107 mm
2. 200 mm
3. 314 mm
4. 428 mm

Answer 8

c. 314 mm

C = πD

C = 3.14 x 100 mm

Question 9

in order to calculate the angle of cut you need to know the

1. outside diameter and length of the bend allowance
2. inside diameter and length of the bend allowance
3. angle of fit and the number of mitre cuts
4. angle of bend and the radius of bend

Answer 9

c. angle of fit and the number of mitre cuts

Question 10

calculate the angle of the cut for a 90° two-piece elbow that requires one weld.

1. 22 ½°
2. 45°
3. 90°
4. 135°

Answer 10

b. 45°

Question 11

the centering head is used to

1. calculate the outside diameter of pipe
2. mark the centre line on the outside of pipe
3. locate the centre angle of elbows and lateral connections
4. determine the inside radius of pipe

Answer 11

b. mark the centre line on the outside of pipe

Question 12

which tools eliminates the need for a template?

1. combination square
2. centering head
3. contour marker
4. torpedo level

Answer 12

c. contour marker