layout Flashcards
Which of the following is a correct ratio of a 3-4-5
triangle?
1. 12-16-20
2. 9-16-20
3. 6-8-12
4. 27-36-45
Page 172
- 12-16-20
Page 172
The layout mechanic can use the 3-4-5 method to check if the ends are ____ to the sides of large plates and also to ____ up frames or structural members.
1. plumb
2. aligned
3. level
4. square
page 172
- square
page 172
What would be the height and diagonal length of a 45 degree triangle with a base of 10 inches?
1. height 14.14, diagonal 10
2. height 10, diagonal 14.14
3. height 10, diagonal 10
4. height 14.14, diagonal 14.14
Page 173
- height 10, diagonal 14.14
Page 173
270 degrees Is what part of a circle?
1. 3/4 circle
2. 1/4 circle
3. 1/2 circle
4. full circle
page 174
- 3/4 circle
page 174
What is a straight line called that touches two points on the circumference of a circle?
1. degree
2. circumference
3. radius
4. chord
page 173
- chord
page 173
The term “strapping” refers to:
1. checking for square
2. measuring the circumference
3. measuring the perimeter
4. determining high/low
Page 176
- measuring the circumference
Page 176
A pressure vessel has an outside circumference
measurement of 2540 mm. What would be the length of the arc length from the 0 degree centerline to the 90 degree centerline.
1. 2540
2. 1905
3. 1270
4. 635
page 182
- 635
page 182
Determine if the following statement is true or false. A flange having 16 bolt holes will also have a total of 16 spaces between each bolt hole.
1. true
2. false
page 185
- true
page 185
Determine if the following statement is true or false. The common procedure when Installing a flange on a pipe or in a vessel is to have the bolt holes straddle the centerline.
1. true
2. false
page 185
- true
page 185
A vessel base ring is being layed out in 3 pieces. An arc, with a radius equal to the outside ring radius, is scribed for each piece. How many distances equal to the ring outside radius are scribed on each arc?
1. 4
2. 3
3. 2
4. 1
Page 189
- 2
Page 189
Parallel Line Development would not be suitable to use as a method of layout on:
1. cones
2. pipe
3. square ducting
4. tubing
Page 191
- cones
Page 191
The outside diameter of a pipe measures 3 1/2 lnches. Determine the length of the stretch out line necessary to develop a template for a two piece 90 degree elbow.
1. 3 1/2
2. 22/7
3. 10 31/32
4. 14
Page 192
- 10 31/32
Page 192
Referring to page 196, illustration #217, the required radius used to develop the semi-plan view of the true wye would be equal to:
1. O.D. of pipe
2. O.D. of pipe divided by 2
3. I.D. of pipe
4. I.D. of pipe divided by 2
Page 196
- O.D. of pipe divided by 2
Page 196
The coffect cut angle for a 3 piece 90 degree tum using 3 inch N.P.S. pipe schedule 40 wall would be:
1. 45 degrees
2. 15 degrees
3. 30 degrees
4. 22 1/2 degrees
page 198
- 22 1/2 degrees
page 198
When laying out the surface of a pipe, an angle iron can be used to help keep which of the following going parallel and in a straight line?
1. chords
2. diameter
3. radial lines
4. centerlines
page 205
- centerlines
page 205
Referring to illustration 221 on page 206, and table #34, determine the measure back distance for a 4 Inch pipe to be torch cut at an angle of 35 degrees. (Note: Refer to Pipe Schedules Chart for actual 0.D. of 4 inch pipe)
1. 1.58
2. 3.15
3. 1.40
4. 1.30
Page 206, 207
- 3.15
Page 206, 207
Refer to the chart on page 209. When making a pipe cap by the orange peel layout method on an 8 inch pipe, how many sections should the pipe end be divided into?
1. 3
2. 5
3. 7
4. 9
Page 209
- 5
Page 209
When laying out a reducmg cone that has a 6 ft. bottom diameter, a 4 ft. top diameter, and is 3 ft. high; the first arc that is scribed will be equal to what length?
1. top circumference
2. bottom circumference
3. height
4. none of above
Page 210
- bottom circumference
Page 210
The principle of triangulation is to establish a plan view length placed at a right angle to the actual vertical height. This will produce a diagonal equal to what length?
1. radial length
2. plan length
3. elevation length
4. true length
page 211
- true length
page 211
Referring to illustration #227 on page 214, the reason for developing only a half pattern of this transition is because it is:
1. conical
2. semi-elliptical
3. right cone
4. symmetrical
page 214
- symmetrical
page 214
The outside diameter of a cylinder is known. The correct formula to calculate the required length of plate would be:
1. O.D. minus one T x pi
2. O.D. minus two T x pi
3. I.D. plus two T x pi
4. O.D. x pi (T = thickness)
Page 216, 217
- O.D. minus one T x pi
Page 216, 217
The required length of plate needed to roll a 48 inch O.D. shell using 1/4 inch plate would be:
1. 150.80 inches
2. 149.23 inches
3. 150 inches
4. 147.65 inches
Page 216, 217
- 150 inches
Page 216, 217
The abbreviation W.P. refers to:
page 217
work point
page 217
The abbreviation C.L. refers to:
page 217
centerline
page 217
The abbreviation SQ. refers to:
page 217
square
page 217
