Math & Measuring Flashcards
Practice reading various gages and performing the type of math used in weld inspection.
1
Q
What dimension is shown on the dial caliper?
A
4.430”
2
Q
What dimension is shown on the dial caliper?
A
0.617”
3
Q
What measurement is being shown on the dial caliper?
A
0.8165”
4
Q
What dimension is shown on the dial caliper?
A
0.794”
5
Q
What dimension is shown on the dial caliper?
A
0.448”
6
Q
What dimension is being shown on this dial caliper?
A
0.730”
7
Q
What dimension is shown on the dial caliper?
A
0.384”
8
Q
What dimension is sown on the dial caliper?
A
0.665”
9
Q
What dimension is shown on the dial caliper?
A
2.317”
10
Q
What dimension is shown on the V-wac guage?
A
3/32”
11
Q
What dimension is shown on this V-wac gauge?
A
3/64”
12
Q
What dimension is shown on this V-wac gauge?
A
3/64”
13
Q
What dimension is shown on this V-wac guage?
A
between 1/64” and 1/32”
14
Q
What dimension is shown on this V-wac guage?
A
Between 5/64” and 3/32”
15
Q
What dimension is shown on this bridge cam gauge?
A
3/16”
16
Q
How long is the third line down?
A
6-11/16”
17
Q
How long is the bottom line?
A
8-1/4”
18
Q
How long is the top line?
A
9-3/4”
19
Q
What dimension is shown on the machinist scale?
A
1-11/32”
20
Q
What fraction is the pen pointing to?
A
3-3/8”
21
Q
How long is the line?
A
2-19/32”
22
Q
What fraction is the arrow pointing to?
A
1-1/8”
23
Q
What fraction is the arrow pointing to?
A
31/32”
24
Q
What dimension is the arrow pointing to?
A
5-3/16”
25
What dimension is the arrow pointing to?
10-13/16"
26
What dimension is the arrow pointing to?
7-1/4"
27
What dimension is the arrow pointing to?
4-5/8"
28
8/64 reduces to what fraction?
1/8
8/64 = 4/32 = 2/16 = 1/8
29
What is 0.125 as a fraction?
1/8
dividing by 5's: 125/1000 = 25/200 = 5/40 = 1/8
30
What is 90% as a fraction?
9/10
90/100 = 9/10
31
What is 45% as a fraction?
9/20
dividing by 5's: 45/100 = 9/20
32
6/16 reduces to what fraction?
3/8
33
How many 64ths are in an inch?
64
34
What is 20% as a fraction?
1/5
dividing by 5's: 20/100 = 2/10 = 1/5
35
1/4" is how many thousanths?
0.250 (250 thousanths)
36
What is 1/8 as a decimal?
0.125
37
What is 30% as a decimal?
0.3
38
1/2" is how many thousandths?
0.500 (five hundred thousandths)
39
What is 1/2 as a decimal?
0.5
40
What is 65% as a decimal?
0.65
41
What is 25% as a decimal?
0.25
42
What is 1/4 as a decimal?
0.25
43
Which is less: 3/8" or 5/64"?
5/64"
44
Which is greater: 3/8" or 1/4"?
3/8"
45
Which is less 3/32" or 1/16"?
1/16"
46
Which is greater 9/16" or 1/2"?
9/16"
47
Which is less 3/4" or 13/16"?
3/4"
48
Which is greater 5/16" or 1/4"?
5/16"
49
True or false?
5/8" ≥ 11/16"
FALSE
50
What does this mean?
≥ 1"
Greater than or equal to 1"
51
What does this mean?
> 5/8"
Greater than 5/8"
52
What does this mean?
≤ 3"
Less than or equal to 3"
53
True of false?
1/4" < 3/16"
FALSE
54
True or false?
7/64" > 1/2"
FALSE
55
True or false?
0.625" ≤ 5/8"
True
0.625 = 5/8
56
True or false?
0.125" ≤ 1/8"
True
0.125 = 1/8
57
True or false?
5/16" < 1/4"
FALSE
58
2" +/- 1/32 = what min. and max. dimensions?
1-31/32" to 2-1/32"
59
1/2" +/- 1/64" has what min. and max. dimensions?
31/64" - 33/64"
60
3/4" +/- 1/8" has what min. and max. dimensions?
5/8" - 7/8"
61
95 ksi is how many psi?
95,000 psi
62
1,000,000 psi is how many ksi?
1,000 ksi
63
What is 1/2 as a percent?
50%
64
What is 25% of 1/2"?
1/8"
0.25 x 0.5 = .125
65
What is 1/4 as a percent?
25%
66
What is 95% of 1,000?
950
0.95 x 1,000 = 950
67
What is 3/4 as a percentage?
75%
68
How much is the internal high-low (mismatch) shown here?
1/16"
2/32 = 1/16
69
How much is the external high-low (mismatch) shown here?
1/8" (4/32)
70
How much is the undercut shown here?
1/32"
71
Is the reinforcement shown here less than 1/8"?
No
72
What is the theoretical throat shown here?
3/8"
73
How much undercut is being shown here?
3/32"
74
How much reinforcement is being shown here?
5/32"
75
What is the UTS (ultimate tensile strength) of a tensile specimen that had an area of 0.5 sq. in. and broke at an ultimate load of 50,000 lbs?
100,000 psi (100 ksi)
100,000/.5 = 100,000
76
What is UTS (ultimate tensile strength) for a tensile specimen that had an area of 0.25 sq. in. and broke at 27,427 psi?
109,708 psi (109.708 ksi)
27,427 / 0.25 = 109,708
77
What is the UTS (ultimate tensile strength) of a tensile specimen with an area of 0.323 sq. in. that broke at 16,485 psi?
51,037 psi (51.037 ksi)
16,485 / 0.323 = 51,037
78
What is the UTS (ultimate tensile strength) of a weld that had a cross section of 0.324 sq. in. and broke at an ultimate load of 38,000 psi?
117,284 psi (117.284 ksi)
38,000 / 0.324
79
What is the percent elongation of a specimen whose original length was 2" and the final length was 2.5"?
25%
2.5" - 2" = 0.5", 0.5/2" x 100 = 25
80
What is the percent elongation of a tensile specimen that measured 4" before testing and 4-1/2" after testing?
12.5%
4.5 - 4 = 0.5, 4 / .5 = 0.125
81
What is the area of a tensile specimen that is 0.5" wide and 0.25" thick?
0.125 sq. in.
0.5 in x 0.25in = 0.125 square inches
82
What is the area of a circle with a diameter of 0.5"?
0.196 sq. in.
0.5 / 2 = 0.25, 0.25 x 0.25 x 3.14 = 0.196
83
What is the area of a tensile specimen that is 3/4" wide and 3/8" thick?
0.281 sq. in.
0.75 x 0.375 = 0.281
84
What is the area of a square with all sides 1/8"?
0.0156 sq. in.
0.125" x 0.125" = 0.0156 square inches
85
What is 1/8" - 1/64"?
7/64"
86
What is 3/16" - 1/8"?
1/16"
87
What is 1/4" - 1/16"?
3/16"
88
What is 1/2" - 3/64"?
29/64"
89
What is 5/8" - 1/16"?
9/16"
90
What is 11/16" - 1/8"?
9/16"
91
What is 7/8" - 1/4"?
5/8"
92
What is 15/16" - 1/64"?
59/64"
93
What is 25% of 3/4?
0.188
0.25 x 0.75 = 0.188
94
What is 12.5% of 0.600?
0.075
0.125 x 0.6 = 0.075
95
What is 8% of 947?
75.76
.08 x 947 = 75.76
96
Which is smaller: 6% of 0.375" or 1/64"?
1/64"
0.06 x 0.375 = 0.0225, 1/64 = 0.016
97
What is 6% of 0.500?
0.03
0.06 x 0.5 = 0.03
98
What is the heat input for a weld made at 120 amps, 12 volts, and travel speed of 4.5 imp (inches per minute)?
19,200 J/in (19.2 kJ/in)
(120 x 12 x 60) / 4.5 = 19,200
99
What is the heat input for a weld made at 98 amps, 8 volts, and a travel speed of 3 ipm (inches per minute)?
15,680 J/in (15.680 kJ/in)
(98 x 8 x 60) / 3 = 15,680
100
What is the heat input of a weld made at 150 amps, 14 volts and a travel speed of 7 ipm (inches per minute)?
18,000 J/in (18 kJ/in)
(150 x 14 x 60) / 7 = 18,000
101
What is 7/16 - 1/8?
5/16
102
The SI prefix milli means what?
0.001
103
The SI prefix micro means what?
0.000 001
104
A welder welded 12" in 2 minutes and 30 seconds. How many inches per minute did he weld?
4.8 in./min
12"/2.5 min. = 4.8
105
A welder welded 10 inches in 1 minute and 45 seconds. How many inches per minute did he weld?
5.7 in./min.
10"/1.75 min. = 5.7
106
A welder welded 15 inches in 4 minutes and 15 seconds. How many inches per minute did he weld?
3.5 in./min.
15 in./4.25 min. = 3.5
107
Is the size of this fillet weld 3/16 in.?
Yes
108
What is the size of this discontinuity?
7/64?
