NATSCI
問題一覧
1
How many gallons of fuel will be contained in a
rectangular-shaped tank which measures 2 feet in
width, 3 feet in length, and 1 foot 8 inches in depth?
(7.5 gal =1 cu ft )
75
2
What is the square root of 4 raised to the 5th power?
32
3
Select the fractional equivalent for a 0.0625-inch-
thick sheet of aluminum.
1/16
4
Which if the figure is using scientific notation?
1. 3.47x 10^4 = 34, 700
2. 2(4^10) 2,097,152
1
5
Which decimal is most nearly equal to a bend radius
of 31/64?
0.4844
6
What is the speed ratio of an input gear with 36 teeth
meshed to a gear with 20 teeth?
1:1.8
7
The result of 7 raised to the third power plus the
square root of 39 is equal to
349.24
8
A blueprint shows a hole of 0.171787 to be drilled.
Which fraction size drill bit is most nearly equal?
11/64
9
Express 7/8 as a percent.
87.5 percent
10
Which alternative answer is equal to 16,300?
1.63x10 to the fourth power
11
A four cylinder aircraft engine has a cylinder bore of
3.78 inches and is 8.5 inches deep. With the piston on
bottom center, the top of the piston measures 4.0
inches from the bottom of the cylinder. What is he
approximate piston displacement of this engine?
200 cubic inches
12
The total piston displacement of a specific engine is
The volume displaced by all the pistons during one revolution of the crankshaft.
13
Find the area of the triangle shown
6 square inches
14
Maximum life for a certain part is 1100 hours.
Recently, 15 of these parts were removed from
different aircraft with an average life of 835.3 hours.
What percent of the maximum part life has been
achieved?
75.9 percent
15
Find the value of 10 raised to the negative sixth
power.
0.000001
16
What is the ratio of 10 feet to 30 inches?
4:1
17
Solve the equation.
-6[-9(-8+4)-2(7+3)] =
-96
18
Solve the equation
.0419
19
Solve the equation
4- 3[-6(2+3) + 4] =
82
20
What size of sheet metal is required to fabricate a
cylinder 20 inches long and 8 inches in diameter?
(note C= pi x D)
20 inches x25-9/64 inches.
21
1.21875 is equal to
39/32
22
An engine develops 108 horse power at 87 percent
power. What horsepower would be developed at 65
percent power?
81
23
Select the fraction which is equal to 0.0250.
1/40
24
Find the square root of 182
.42708x10 to the second power
25
Find the square root of 1746
41.7852
26
The parts department’s profit is 12 percent on a new
part. How much does the part cost if the selling rice
is $145.60?
$130.00
27
Find the square root of 3,722.1835
61.0097
28
A certain aircraft bolt has an overall length of 1-1/2
inches, with a shank length of 1-3/16 inches, and a
threaded portio length of 5/8 inch. What s the grip
length.
5625 inch
29
Find the cube of 64
262, 144
30
What is the surface area of a cube where a side
(edge) measures 7.25 inches?
315.375 sq. in.
31
A rectangular shaped fuel tank measures 27-1/2
inches in length, ¾ foot in width, and 8-1/4 inches in
depth. How (231 cu in = 1 gal)
8.83
32
Solve the equation
(√100 + √36 − √16=
12
33
Sixty-five engines are what percent of 80 engines?
81 percent
34
Solve the equation
14.002
35
Convert the binary number 1111 to decimal form.
15
36
What is the ratio of a gasoline fuel load of 200
gallons to one of 1680 pounds?
5:7
37
What is defined as a group of bits representing a
complete piece of information?
Byte
38
Solve the equation.
(64x3/8) ÷ ¾ =
32
39
What power of 10 is equal to 1,000,000,000?
10 to the ninth power
40
If the volume of a cylinder with the piston at the
bottom center is 84 cubic inches and the piston
displacement is 70 cubic inches, then the
compression ratio is
6:1
41
An airplane flying a distance of 750 miles used 60
gallons of gasoline. How any gallons will it need to
travel 2,500 miles?
200
42
What is the piston displacement of a master cylinder
with a 1.5 inch diameter bore and a piston stroke of 4
inches?
7.0686 cubic inches
43
Find the square root of 124.924
1,118x10 to the negative second power
44
Compute the area of the trapezoid
10 square feet
45
A rectangular-shaped fuel tank measures 60 inches in
length, 30 inches in width and 12 inches in depth.
How many cubic feet are within the tank?
12.5
46
What is the speed of a spur gear with 42 teeth drive
by a pinion gear with 14 teeth turning 420 RPM?
140 RPM
47
What is the speed of a spur gear with 42 teeth drive
by a pinion gear with 14 teeth turning 420 RPM?
140 RPM
48
Which alternative answer is equal to 5.59?
(√𝟑𝟏) + (√𝟒𝟑) ÷ 𝟏𝟕^2
49
The radius of a piece of round stock is 7/32. Select the
decimal which is most nearly equal to the diameter.
0.4375
50
If an engine is turning 1,965 rpm at 65 percent
power, what is its maximum rpm?
3023
51
A pinion gear with 14 teeth is driving a spur gear
with 42 teeth at 140 RPM. Determine the speed of the
pinion gear.
420 RPM
52
Determine the area of the triangle formed by points A, B and C.
A to B=7.5 inches A to D= 16.8 inches
63 square inches
53
How much current does a 30-volt, 1/2 horsepower
motor that is 85 percent efficient draw from the bus?
(note: 1 horsepower = 746 watts)
14.6 amperes
54
Which of the following is the square root of (-1776)/
(-2)-632?
16
55
What force is exerted on the piston in a hydraulic
cylinder if the area of piston is 1.2 square inches and
the fluid pressure is 850 PSI?
1,020 pounds
56
A 6 cylinder engine with bore of 3.5 inches, a cylinder
height of 7 inches and a stroke of 4.5 inches will have
total piston displacement of
259.77 cubic inches
57
Solve the equation
-5.20
58
What is the squareroot of 16 raised to the fourth
power?
256
59
The number 3.47x 10 to the negative fourth power is
equal to
000347
60
Solve the equation
11.9
61
Select the decimal which is most nearly equal to
77/64
1.2031
62
Solve the equation.
(32x 3/8) ÷ 1/6 =
72
63
Solve the equation.
½ (-30+34)5
10
64
Solve the equation.
[4 x -3) +(-9x2)] ÷2=
-15
65
A rectangular shaped fuel tank measures 37-1/2
inches in length, 14 inches in width and 8-1/4 inches
in depth. How many cubic inches are within the tank?
4331.25
66
Compute the area of trapezoid
52.5 square feet
67
Express 5/8 as a percent
62.5 percent
68
An engine of 98 horse power maximum Is running at
75 percent power. What is the horsepower being
developed?
73.50
69
Solve the equation.
(-3+2) (-12 – 4)+(-4+6) x3
22
70
Select the container size that will be equal in volume
to 60 gallons on fuel. (7.5 gal = 1 cu ft)
8.0 cubic feet
71
Solve the equation.
-4+6+103 (√1296) =
36002
72
Which statement regarding aircraft bolts is correct?
In general, bolt grip lengths should equal the material thickness
73
How many of these factors are considered essential
knowledge for x-ray exposure?
1. Processing of the film
2. Material thickness and density
3. Exposure distance and angle
4. Film characteristics
Three
74
What precision measuring tool is used for measuring
crankpin and main bearing journals for out-of-round
wear?
Micrometer caliper
75
On a fillet weld, the penetration requirement includes
what percentage(s) of the base metal thickness?
25 – 50 percent
76
What is descriptive of the annealing process of steel
during after it has been annealed?
Slow cooling; low strength
77
Which tool can be used to determine piston pin out-
of-round wear?
Micrometer caliper
78
Which of the following is a main determinant of the
dwell time to use when conducting a dye r fluorescent
penetrant inspection?
The size and shape of the discontinuities being looked for
79
Which statement relating to the residual magnetizing
inspection method is true?
It may be used with steels which have been heat treated for stressed applications
80
In examining and evaluating a welded joint, a
mechanic should be familiar with
Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition
81
Circular magnetization of a part can be used to detect
which defects?
Defects parallel to the long axis of the part
82
(1) In nondestructive testing a discontinuity may be
defined as an interruption in the normal physical
structure or configuration of a part
(2) A discontinuity may or may not affect the
usefulness of a part
Regarding the above statements,
Both No.1 and No.2 are true
83
In performing a dye penetrant inspection, the
developer
Acts as a blotter to produce a visible indication
84
If it is necessary to accurately measure the diameter
of a hole approximately ¼ inch in diameter, the
mechanic should use a
Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
85
What method of magnetic particle inspection is used
most often to inspect aircraft parts for invisible
cracks and other defects?
Continuous
86
What two types of indicating mediums are available
for magnetic particle inspection?
Wet and dry process materials
87
If dye penetrant inspection indications are not sharp
and clear, the most cause is that part
Was not thoroughly washed before the developer was applied
88
What aluminum alloy designations indicate that the
metal has received no hardening or tempering
treatment
3003-F
89
Which heat-treating operation would be performed
when the surface of the metal is changed chemically
by introducing a high carbide or nitride content?
Case hardening
90
Unless otherwise specified, torque values for
tightening aircraft nuts and bolts relate to
Clean, dry threads
91
What nondestructive testing method requires little or
no part preparation, is used to detect surface or near-
surface defects in most metals, and may also be used
to separate metals or alloys and their heat-treat
conditions?
Eddy current inspection
92
How is the locking feature of the fiber-type locknut
obtained?
By the use of an unthreaded fiber locking insert
93
When the specific torque value for nuts is not given,
where can the recommended torque value be found?
AC 43. 13-1B
94
Alclad is a metal consisting of
Pure aluminum surface layers on an aluminum alloy core
95
Which of the following defects are not acceptable for
metal lines?
1. Cracked flare
2. Seams
3. Dents in the heel of a bend less than 20% of the
diameter
4. Scratches/nicks on the inside of a bend less than
10% of wall thickness
5. Dents in straight section that are 20% of tube
diameter
1,2,3 and 5
96
Which heat-treating process of metal produces a
hard, wear-resistant surface over a strong, tough
core?
Case hardening
97
Generally speaking, bolt grip lengths should be
Equal to the thickness of the material which is fastened together
98
Which of the following describe the effects of
annealing steel and aluminum alloys?
1. Decrease in internal stress
2. Softening of the metal
3. Improved corrosion resistance
1,2
99
A bolt with an X inside a triangle on the head is
classified as an
NAS close tolerance bolt
100
When checking an item with the magnetic particle
inspection method, circular and longitudinal
magnetization should be used to
Reveal all possible defects
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82問 • 2年前問題一覧
1
How many gallons of fuel will be contained in a
rectangular-shaped tank which measures 2 feet in
width, 3 feet in length, and 1 foot 8 inches in depth?
(7.5 gal =1 cu ft )
75
2
What is the square root of 4 raised to the 5th power?
32
3
Select the fractional equivalent for a 0.0625-inch-
thick sheet of aluminum.
1/16
4
Which if the figure is using scientific notation?
1. 3.47x 10^4 = 34, 700
2. 2(4^10) 2,097,152
1
5
Which decimal is most nearly equal to a bend radius
of 31/64?
0.4844
6
What is the speed ratio of an input gear with 36 teeth
meshed to a gear with 20 teeth?
1:1.8
7
The result of 7 raised to the third power plus the
square root of 39 is equal to
349.24
8
A blueprint shows a hole of 0.171787 to be drilled.
Which fraction size drill bit is most nearly equal?
11/64
9
Express 7/8 as a percent.
87.5 percent
10
Which alternative answer is equal to 16,300?
1.63x10 to the fourth power
11
A four cylinder aircraft engine has a cylinder bore of
3.78 inches and is 8.5 inches deep. With the piston on
bottom center, the top of the piston measures 4.0
inches from the bottom of the cylinder. What is he
approximate piston displacement of this engine?
200 cubic inches
12
The total piston displacement of a specific engine is
The volume displaced by all the pistons during one revolution of the crankshaft.
13
Find the area of the triangle shown
6 square inches
14
Maximum life for a certain part is 1100 hours.
Recently, 15 of these parts were removed from
different aircraft with an average life of 835.3 hours.
What percent of the maximum part life has been
achieved?
75.9 percent
15
Find the value of 10 raised to the negative sixth
power.
0.000001
16
What is the ratio of 10 feet to 30 inches?
4:1
17
Solve the equation.
-6[-9(-8+4)-2(7+3)] =
-96
18
Solve the equation
.0419
19
Solve the equation
4- 3[-6(2+3) + 4] =
82
20
What size of sheet metal is required to fabricate a
cylinder 20 inches long and 8 inches in diameter?
(note C= pi x D)
20 inches x25-9/64 inches.
21
1.21875 is equal to
39/32
22
An engine develops 108 horse power at 87 percent
power. What horsepower would be developed at 65
percent power?
81
23
Select the fraction which is equal to 0.0250.
1/40
24
Find the square root of 182
.42708x10 to the second power
25
Find the square root of 1746
41.7852
26
The parts department’s profit is 12 percent on a new
part. How much does the part cost if the selling rice
is $145.60?
$130.00
27
Find the square root of 3,722.1835
61.0097
28
A certain aircraft bolt has an overall length of 1-1/2
inches, with a shank length of 1-3/16 inches, and a
threaded portio length of 5/8 inch. What s the grip
length.
5625 inch
29
Find the cube of 64
262, 144
30
What is the surface area of a cube where a side
(edge) measures 7.25 inches?
315.375 sq. in.
31
A rectangular shaped fuel tank measures 27-1/2
inches in length, ¾ foot in width, and 8-1/4 inches in
depth. How (231 cu in = 1 gal)
8.83
32
Solve the equation
(√100 + √36 − √16=
12
33
Sixty-five engines are what percent of 80 engines?
81 percent
34
Solve the equation
14.002
35
Convert the binary number 1111 to decimal form.
15
36
What is the ratio of a gasoline fuel load of 200
gallons to one of 1680 pounds?
5:7
37
What is defined as a group of bits representing a
complete piece of information?
Byte
38
Solve the equation.
(64x3/8) ÷ ¾ =
32
39
What power of 10 is equal to 1,000,000,000?
10 to the ninth power
40
If the volume of a cylinder with the piston at the
bottom center is 84 cubic inches and the piston
displacement is 70 cubic inches, then the
compression ratio is
6:1
41
An airplane flying a distance of 750 miles used 60
gallons of gasoline. How any gallons will it need to
travel 2,500 miles?
200
42
What is the piston displacement of a master cylinder
with a 1.5 inch diameter bore and a piston stroke of 4
inches?
7.0686 cubic inches
43
Find the square root of 124.924
1,118x10 to the negative second power
44
Compute the area of the trapezoid
10 square feet
45
A rectangular-shaped fuel tank measures 60 inches in
length, 30 inches in width and 12 inches in depth.
How many cubic feet are within the tank?
12.5
46
What is the speed of a spur gear with 42 teeth drive
by a pinion gear with 14 teeth turning 420 RPM?
140 RPM
47
What is the speed of a spur gear with 42 teeth drive
by a pinion gear with 14 teeth turning 420 RPM?
140 RPM
48
Which alternative answer is equal to 5.59?
(√𝟑𝟏) + (√𝟒𝟑) ÷ 𝟏𝟕^2
49
The radius of a piece of round stock is 7/32. Select the
decimal which is most nearly equal to the diameter.
0.4375
50
If an engine is turning 1,965 rpm at 65 percent
power, what is its maximum rpm?
3023
51
A pinion gear with 14 teeth is driving a spur gear
with 42 teeth at 140 RPM. Determine the speed of the
pinion gear.
420 RPM
52
Determine the area of the triangle formed by points A, B and C.
A to B=7.5 inches A to D= 16.8 inches
63 square inches
53
How much current does a 30-volt, 1/2 horsepower
motor that is 85 percent efficient draw from the bus?
(note: 1 horsepower = 746 watts)
14.6 amperes
54
Which of the following is the square root of (-1776)/
(-2)-632?
16
55
What force is exerted on the piston in a hydraulic
cylinder if the area of piston is 1.2 square inches and
the fluid pressure is 850 PSI?
1,020 pounds
56
A 6 cylinder engine with bore of 3.5 inches, a cylinder
height of 7 inches and a stroke of 4.5 inches will have
total piston displacement of
259.77 cubic inches
57
Solve the equation
-5.20
58
What is the squareroot of 16 raised to the fourth
power?
256
59
The number 3.47x 10 to the negative fourth power is
equal to
000347
60
Solve the equation
11.9
61
Select the decimal which is most nearly equal to
77/64
1.2031
62
Solve the equation.
(32x 3/8) ÷ 1/6 =
72
63
Solve the equation.
½ (-30+34)5
10
64
Solve the equation.
[4 x -3) +(-9x2)] ÷2=
-15
65
A rectangular shaped fuel tank measures 37-1/2
inches in length, 14 inches in width and 8-1/4 inches
in depth. How many cubic inches are within the tank?
4331.25
66
Compute the area of trapezoid
52.5 square feet
67
Express 5/8 as a percent
62.5 percent
68
An engine of 98 horse power maximum Is running at
75 percent power. What is the horsepower being
developed?
73.50
69
Solve the equation.
(-3+2) (-12 – 4)+(-4+6) x3
22
70
Select the container size that will be equal in volume
to 60 gallons on fuel. (7.5 gal = 1 cu ft)
8.0 cubic feet
71
Solve the equation.
-4+6+103 (√1296) =
36002
72
Which statement regarding aircraft bolts is correct?
In general, bolt grip lengths should equal the material thickness
73
How many of these factors are considered essential
knowledge for x-ray exposure?
1. Processing of the film
2. Material thickness and density
3. Exposure distance and angle
4. Film characteristics
Three
74
What precision measuring tool is used for measuring
crankpin and main bearing journals for out-of-round
wear?
Micrometer caliper
75
On a fillet weld, the penetration requirement includes
what percentage(s) of the base metal thickness?
25 – 50 percent
76
What is descriptive of the annealing process of steel
during after it has been annealed?
Slow cooling; low strength
77
Which tool can be used to determine piston pin out-
of-round wear?
Micrometer caliper
78
Which of the following is a main determinant of the
dwell time to use when conducting a dye r fluorescent
penetrant inspection?
The size and shape of the discontinuities being looked for
79
Which statement relating to the residual magnetizing
inspection method is true?
It may be used with steels which have been heat treated for stressed applications
80
In examining and evaluating a welded joint, a
mechanic should be familiar with
Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition
81
Circular magnetization of a part can be used to detect
which defects?
Defects parallel to the long axis of the part
82
(1) In nondestructive testing a discontinuity may be
defined as an interruption in the normal physical
structure or configuration of a part
(2) A discontinuity may or may not affect the
usefulness of a part
Regarding the above statements,
Both No.1 and No.2 are true
83
In performing a dye penetrant inspection, the
developer
Acts as a blotter to produce a visible indication
84
If it is necessary to accurately measure the diameter
of a hole approximately ¼ inch in diameter, the
mechanic should use a
Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
85
What method of magnetic particle inspection is used
most often to inspect aircraft parts for invisible
cracks and other defects?
Continuous
86
What two types of indicating mediums are available
for magnetic particle inspection?
Wet and dry process materials
87
If dye penetrant inspection indications are not sharp
and clear, the most cause is that part
Was not thoroughly washed before the developer was applied
88
What aluminum alloy designations indicate that the
metal has received no hardening or tempering
treatment
3003-F
89
Which heat-treating operation would be performed
when the surface of the metal is changed chemically
by introducing a high carbide or nitride content?
Case hardening
90
Unless otherwise specified, torque values for
tightening aircraft nuts and bolts relate to
Clean, dry threads
91
What nondestructive testing method requires little or
no part preparation, is used to detect surface or near-
surface defects in most metals, and may also be used
to separate metals or alloys and their heat-treat
conditions?
Eddy current inspection
92
How is the locking feature of the fiber-type locknut
obtained?
By the use of an unthreaded fiber locking insert
93
When the specific torque value for nuts is not given,
where can the recommended torque value be found?
AC 43. 13-1B
94
Alclad is a metal consisting of
Pure aluminum surface layers on an aluminum alloy core
95
Which of the following defects are not acceptable for
metal lines?
1. Cracked flare
2. Seams
3. Dents in the heel of a bend less than 20% of the
diameter
4. Scratches/nicks on the inside of a bend less than
10% of wall thickness
5. Dents in straight section that are 20% of tube
diameter
1,2,3 and 5
96
Which heat-treating process of metal produces a
hard, wear-resistant surface over a strong, tough
core?
Case hardening
97
Generally speaking, bolt grip lengths should be
Equal to the thickness of the material which is fastened together
98
Which of the following describe the effects of
annealing steel and aluminum alloys?
1. Decrease in internal stress
2. Softening of the metal
3. Improved corrosion resistance
1,2
99
A bolt with an X inside a triangle on the head is
classified as an
NAS close tolerance bolt
100
When checking an item with the magnetic particle
inspection method, circular and longitudinal
magnetization should be used to
Reveal all possible defects