Sheet Metal Ex9

Question 1

90° bend, .064 inch thick, 2024 – T3
A.192–320
B 384–512
C 576–640

Answer 1

A 192–320

Question 2

Which of the following would require most material for a 90° band?
A 2024
B 5052
C.7075

Answer 2

C.7075

Question 3

Which of the following would require the most material for a 90° bend
A.2024
b. 5052.
C.7075

Answer 3

C.7075

Question 4

Which of the following would require the most material for a 90° bend
A two bands of 2024
B one bend of 5052
C one bend of 7075

Answer 4

C one band of 7075

Question 5

Which of the following would require the most material for a 90° bend
A one bend of 2024
B, two bands of 5052
C one band of 7075

Answer 5

B two bends of 5052

Question 6

L bracket, 90° band, .064 thick, 2024 – T6
A 192
B 355
C 224

Answer 6

B 355

Question 7

Bend allowance 90°, .032 thick, 1/4 inch radius
A 216
B 415
C 366

Answer 7

B 415

Question 8

Bend allowance 90°, .040 thick, 5–32 inch radius
A 279
B 273
C 372

Answer 8

B 273

Question 9

Ben allowance per degree, .040 thick, 5/16 inch radius
A 520
B .003034
C.005774

Answer 9

C.005774

Question 10

135° open angle, bend. How many degrees bent?
A 90
B 45
C 35

Answer 10

B 45
180 - 135 =45

Question 11

45° closed angle bend. How many degrees has it been bent?
A 90
B 135
C155

Answer 11

B 135
180-45 = 135

Question 12

To form a closed angle bend, the metal would have to be bent
A greater than 90
B less than 90
C 90

Answer 12

A greater than 90

Question 13

To form an open angle bend, the metal would have to be bent
A 90° or less
B less than 90
C greater than 90

Answer 13

B less than 90°

Question 14

When forming a band with a flat sheet of metal stock, and open angle
A is 90° or less
B requires less degrees of bending than a 90° band
C requires more degrees of bending than 90° band

Answer 14

B requires less degrees of bending the 90° bend

Question 15

The setback for a 90° bend, 2024 – T3, .032 thickness would be
A more setback than 45° closed angle
B less setback than 135° open angle
C less setback/toosmall than a 45° closed angle

Answer 15

C.less setback/2 small than a 45° closed angle

Question 16

When bending metal from a flat sheet of metal stock, the degrees in the middle is actually bent is called
A the angle of the bend
B the bend angle
C the obtuse angle

Answer 16

B.the bend angle

Question 17

How would you determine the location of the site line when bending metal?
A first bend tangent line plus the radius
B first Ben tangent line plus the mold line
C radius, plus the thickness

Answer 17

A first band tangent line plus the radius

SL equals BTL plus radius

Question 18

When bending metal, the location of the site line would be the Bend tangent line plus
A the mold line
B the radius
C the thickness of the metal

Answer 18

B.the radius

Question 19

A site line drawn on material bent in a cornice brake is the bend radius plus
A bend allowance
B.Bend tangent line
C. Setback measurement.

Answer 19

B bend tangent line

Question 20

When making a sheet metal bend with a cornice break, the technician must select and install the correct radius bar. The position at which the radius bar is installed in the Brake is termed as what?
A the mold line
B setback
C.Bend allowance

Answer 20

A.the mold line

Question 21

The distance between the jaws of the Brake and the mold line is known as the
A K factor
B.Bend allowance
C.setback

Answer 21

C.setback

Question 22

Setback could be determined by using which of the following
A industry standard formula
B.industry standard chart
C.both

Answer 22

C. Both.

Question 23

Bend allowance can be determined by using which of the following
A.industry standard formula
B.industry standard chart
C.either a or B

Answer 23

C.either a or B

Question 24

To determine the radius of a bend, you must use, which of the following
A industry standard formula
B industry standard chart
C.both a and B

Answer 24

B industry standard chart

Question 25

With a larger than minimum bend radius, the setback from the set line A lessons B is greater C does not change

Answer 25

B is greater

Question 26

To determine the flat of a sheet metal bin, what would you subtract from the mold line? A setback B bend tangent C bend allowance

Answer 26

A setback

Question 27

How would you determine the flat of a sheet metal bend A mold line plus setback B.mold line minus setback C.mold line minus spend allowance

Answer 27

B.mold line minus set back Setback is always subtracted

Question 28

When forming a 90° bend .125 radius, 032 thick, the setback for the horizontal flat would be A bend radius + material thickness B. Bend radius.+ material x K factor C.bend radius minus K factor

Answer 28

A.bend radius+ material thickness

Question 29

What is the formula used to determine the necessary setback when forming a 90° bend A setback equals bend radius + material thickness x K factor B.setback equals bend radius +material thickness C.setback equals bend radius minus K factor

Answer 29

B. Setback equals bend radius + material thickness

Question 30

Which of the following would be used to determine setback for 135° open angle bend A bend radius + material thickness B.bend radius + half the material thickness X the K factor C.bend radius + material thickness X the K factor

Answer 30

C.bend radius + material thickness X the K factor.

Question 31

What is the setback for a sheet of 2024 – T4, 032 thick for a 30° bend angle A 1203 B 0337 C.2103

Answer 31

B 0337

Question 32

What is the setback for a sheet of 5052–0, 040 thick with 110° Bend angle A 1025 B14637 C0500

Answer 32

B14637

Question 33

What is the setback with 1/8 inch radius, 032 thick with 145° bend angle A 250 B 352 C498

Answer 33

C 498

Question 34

Under what conditions may a .032 bend radius be used for a 90° bend of 5052 – H 32 with a thickness of .128 A if the metal is a kneeled prior to bending B radius cannot be used, it is too small C radius cannot be used, it is too large

Answer 34

B radius cannot be used, it is too small

Question 35

How do you measure the radius of a bend? A outside of the bend B inside of the bend C bend tangent line

Answer 35

b.inside of the bend

Question 36

What type of stresses occurs when the meal is bent? A compression B tension C both

Answer 36

C.both

Question 37

The intersecting point of the lines that extend from the outer surface of each leg is called the A mold point B radius projection point C.site line point

Answer 37

A mold point

Question 38

For a 90° bend of 5052–0, 020 thick, if the setback for the horizontal flat is .176. The setback for the vertical flat would be. A .088 b..176 C..352

Answer 38

B .176

Question 39

For a 90° bend of 5052–0, 020 thick, the setback for the vertical flat would be A less than the setback for the horizontal flat B.more than the setback for the horizontal flat C.equal to the setback for the horizontal flat

Answer 39

C.equal to the setback for the horizontal flat

Question 40

When forming a 90° bend with a flat sheet of metal stock using .125 radius, 2024 – T3, .032 thick, if the setback for the horizontal flat is .157, the setback for the vertical flat would be A .157 b..272 C..040

Answer 40

A.157

Question 41

The longer part of a formed angle is the A flange B leg C.mold line

Answer 41

B leg

Question 42

The shorter part of a formed angle is the A leg B flange C mold line

Answer 42

B flange

Question 43

If each side of a formed angle is the same length, then each side would be known as a A leg B flange C mold line

Answer 43

A leg