Practice Exam 2 Flashcards
(137 cards)
1
Q
The ovaries produce:
A
estrogen
2
Q
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
A
estrogen
3
Q
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
A
100 times stronger
4
Q
Muscles attach to bone with:
A
tendons
5
Q
Atoms are most tightly packed in:
A
solids
6
Q
Blood leaving the lungs is:
A
oxygenated
7
Q
- The longest river in the world is:
A
Nile
8
Q
- Mitosis is a process of:
A
(D) asexual reproduction
9
Q
When added to a cloud’s name, which of the following means rain?
A
Nimbus
10
Q
The movement of particles from an area of high concentration to an area of lower concentration is called:
A
diffusion
11
Q
The instrument used to measure wind speed is:
A
anemometer
12
Q
Electric charges can be:
A
(A) positive or negative
13
Q
Which planet in the solar system has the most moons?
A
Saturn
14
Q
Hydrogen has the atomic number 1. This means that hydrogen has:
A
one proton
15
Q
Which U.S. space program is responsible for putting 12 men on the moon?
A
Apollo
16
Q
Organisms that eat other organisms are called:
A
predators
17
Q
Unlike most other fish, sharks have no:
A
bones
18
Q
What human organ is responsible for cleaning the blood?
A
kidneys
19
Q
- Kinetic energy is the energy that:
A
(C) is possessed by a moving object
20
Q
In what year did the first woman travel in space?
A
1963
21
Q
A step-up transformer:
A
increases the voltage in a power line
22
Q
What animal has the heaviest brain?
A
sperm whale
23
Q
Passing sunlight through a prism:
A
separates the colors into a spectrum
24
Q
Molecules are created when:
A
atoms combine together
25
The first genetically engineered organism was:
tobacco
26
The vernal equinox is:
the first day of spring
27
If a hexahedral die is rolled two times, what’s the probability of NOT rolling a five both times?
The probability of rolling a 5 is 1 out of 6 (1⁄6), so the probability of NOT rolling a 5 is 1 – 1⁄6, or 5⁄6. The probability of not rolling a 5 twice is 5⁄6 5⁄6, or 25⁄36.
28
A 2-ton truck is taxed at a rate of $0.12 per pound. How much is the total tax bill?
2 tons = 4,000 pounds. 4,000 $0.12 = $480.00.
29
30
A half-pint of cream is what part of a gallon?
8 pints make up a gallon, so a gallon contains 16 half-pints. One half-pint equals 1⁄16 of a gallon.
31
The cost of a protein bar increased from $2.50 to $2.80. The percent increase to the $2.80 rate was how much?
First subtract the old cost from the new cost: $2.80 – $2.50 = $0.30. Then divide the difference by the old cost to find the percent difference: $0.30 ÷ $2.50 = 0.12 = 12%.
32
An aircraft flies over Boondock Air Force Base at 10:20 a.m. At 10:32 a.m., the plane passes over Sea Side Naval Air Station, 120 miles away. How fast is the aircraft traveling?
The aircraft travels 120 miles in 12 minutes, which is 1⁄5 of an hour. Therefore, in 5⁄5 (one) hour, it would travel 5 120, or 600 miles. The aircraft is traveling 600 miles per hour.
33
Last year, Margot grew 50 bushels of corn in her backyard. This year, the yield has increased 8%. How many bushels of corn did Margot grow this year?
Multiply 50 bushels by 8% to find the yield increase in bushels: 50 0.08 = 4. Add 4 bushels (the amount of the increase) to 50 bushels (the original yield) to determine that an 8% increase equals 54 bushels.
34
Junior has saved money in his piggybank over the winter. He wants to buy a $30 com- puter game. If he has 14 one-dollar bills, 16 half dollars, 12 quarters, 8 dimes, 25 nickels, and 10 pennies, how much more does he need to borrow from Dad to buy the game?
Subtract the total from $30.00 to determine how much money Junior has to borrow: $30.00 – $27.15 = $2.85.
35
Debbie receives a weekly salary of $80, plus a 5% commission on any sales. During the week, she has $800 in total sales. What’s the ratio of her commission to her salary?
Her commission for the week was $40 (0.05 800 = 40). The ratio of her commission to her salary is 40⁄80, which can be reduced to 1⁄2.
36
How many quart cans can be filled from a 25-gallon bucket of paint?
A gallon consists of 4 quarts. 4 25 = 100.
37
If a crew of four people can paint the barn in three days, how long will it take a crew of two people?
Dividing 4 crewmembers by 2 crewmembers shows that 4 members are twice as many as 2 members. Multiply the number of days it would take 4 people to paint by 2 (3 2) to determine how long it would take 2 people to do the same task.
38
Brian works for five hours and is paid $24. Christina works for three hours and is paid $10.95. How much more per hour does Brian make than Christina?
Brian’s hourly wage is 24⁄5 ($4.80). Christina’s hourly wage is 10.95/3($3.65). $4.80 – $3.65 = $1.15.
39
Margaret is getting married and must be ready by 11:15 a.m. If it’s now 8:30 a.m., how much time does she have to get ready?
The amount of time from 8:30 a.m. to 11:15 a.m. is 2 hours and 45 minutes, or 245⁄60. To reduce the fraction, divide 45 by 60 to get 0.75, or 3⁄4. The total amount of time Margaret has to get ready is 23⁄4 hours.
40
An accounting-firm employee is asked to shred 900 documents. If he can shred docu- ments at a rate of 7 per minute, the number of documents remaining after 11⁄2 hours of shredding is:
At a rate of 7 documents per minute, the employee can shred 630 documents in 90 min- utes. How do you come up with that number? Multiply 7 by 90 (the number of minutes in 11⁄2 hours). Subtract 630 from 900 total documents to determine that after 11⁄2 hours of shredding, 270 documents remain.
41
A home stereo depreciates by 20% each year. What’s the value of a stereo, pur- chased new for $1,200, after two years?
The stereo depreciates $240 the first year (0.2 1200 – 240). Therefore, the value of the stereo after the first year is $1200 – $240 = $960. The second year the stereo would depreci- ate by $192 (0.2 960). The value of the stereo after the second year is $960 – $192 = $768.
42
Janet’s old pickup truck can only reach a speed of 45 miles per hour. If she drives at top speed, how long will it take her to reach a city 135 miles away?
Divide the distance (135 miles) by the speed (45 miles per hour) to determine that Janet will take 3 hours to reach the city.
43
A blouse normally costs $18.50. How much money is saved if the blouse is purchased at a 20% discount?
Multiply the price of the blouse by the amount of the discount: $18.50 0.20 = $3.70.
44
A clerk’s weekly salary of $320 is increased to $360. The percent increase is:
Subtract the original salary from the new salary to get the difference in salary:
$360 – $320 = $40. Then divide the difference in salary ($40) by the original salary ($320) to determine the percent increase: 40 ÷ 320 = 0.125 = 12.5%.
45
Two go-carts are racing on a circular track with a perimeter of 360 feet. Camera One is following Go-Cart One, and Camera Two is following Go-Cart Two. If the angle between the two cameras is 40 degrees, how far apart are the two go-carts?
A circle is 360 degrees, so 40 degrees is 1⁄9 of a circle (360 ÷ 40 = 9). To get the answer of 40 feet, multiply the perimeter of the track 1⁄9 (360 1⁄9 = 40).
46
Dinner at a nice restaurant cost $35.98. If Joan gave the cashier $40.00, how much change should she get back?
Subtract $35.98 from $40.00 to get $4.02.
47
A balloonist circumnavigated the globe in 13 days, 12 hours, 16 minutes, and 13 sec- onds. A plane circumnavigates the globe in 4 days, 10 hours, 15 minutes, and 7 sec- onds. How much longer did it take for the balloon to go around the world?
48
Darlene bought 12 boxes of cookies for $48.00. What was the cost of each box of cookies?
Divide the total cost by the number of boxes purchased to determine the cost per box:
$48 ÷ 12 = $4.
49
A tune-up increases a car’s fuel efficiency by 5%. If a car averaged 20 miles per gallon before the tune-up, how many miles per gallon will it average after the tune-up?
Multiply 20 0.05 to determine how many more miles per gallon the car will get. The answer is 1. Then add the number of additional miles per gallon the car will get to the origi- nal number of miles per gallon the car gets to reach the new average: 1 + 20 = 21.
50
A lumberjack wishes to drive a spike through the center of a tree with a circumference of 43.96 feet. What’s the minimum length of the spike needed to go completely through the tree, passing through the center?
The minimum length of spike is equal to the diameter of the tree. To find the
diameter of the tree, use the formula, C = ÷ d, where C = 43.96, and ÷ = 3.14. 43.96 = 3.14 d. d = 43.96 ÷ 3.14. d = 14.
51
A bin of hard candy holds 101⁄2 pounds. How many 3⁄4 -pound boxes of candy can be filled from the bin?
52
A patio measures 12 feet by 14 feet. How many 8-inch-square paving stones are needed to pave the patio?
First multiply length width to determine the area of the patio: 12 feet 14 feet = 168 square feet. Next determine the area in square inches that needs to be covered: 168 square feet 12 inches = 2,016 square inches. Finally, divide that answer by the size of the stones to determine the number of stones needed: 2,016 ÷ 8 = 252.
53
A computer programmer is making $25,000 per year. 28% of her salary is withheld for federal and state deductions. How much is the computer programmer’s net pay?
Calculate the amount of the deduction by multiplying her salary by the percent deducted: $25,000 28% = $25,000 0.28 = $7,000. Subtract that product from the salary to determine the net pay: $25,000 – $7,000 = $18,000.
54
Pam cuts a pie in half in a straight line. She then cuts a line from the center to the edge, creating a 55-degree angle. What’s the sup- plement of that angle?
When the sum of two angles is 180 degrees, the angles are said to be supplemental to each other. To find the supplement, subtract 55 from 180 (180 – 55 = 125)
55
A stack of lumber is 6-feet high. If each piece of lumber is 4-inches thick, how many pieces of lumber are in the stack?
Multiply the height of the stack in feet by 12 to determine the height of the stack in inches: 6 12 = 72 inches. Divide that number by 4 inches, the thickness of each board to determine the number of pieces of lumber in the stack: 72 ÷ 4 = 18.
56
If two exponents have the same base, you can multiply them by keeping the base and adding the exponents together.
57
If a rectangle has a perimeter of 36 feet, and it’s 4-feet wide, what’s its area?
To find area, multiply length times width (A = lw). To determine the length, subtract two times the width from the perimeter: 36 – 2(4) = 36 – 8 = 28. Then divide the remainder by 2 to determine the length of one side: 28 ÷ 2 = 14. Then multiply length times width to deter- mine the area: 14 4 = 56.
58
The cube root of 64 is:
The cube of 4 = 4 4 4 = 64, so 4 is the cube root of 64.
59
Convert 314,000 to scientific notation.
60
A reciprocal is the number by which a number can be multiplied to produce 1. So the reciprocal of 1⁄6 is 6 because 1⁄6 x 6 = 1.
61
If 0.05 ÷ x = 1, then x =
Multiply both sides of the equation by 0.05 to isolate x: 0.05 ÷ x 0.05 = 1 0.05 or x = 0.05. Check by substituting 0.05 for x in the original equation.
62
63
(3x2)(7–2)(6+2)=(6x4)x. What’s the value of x?
64
Solve for x: 2x – 6 = x + 5
65
66
67
A circle has a radius of 5 inches. What’s its approximate area?
The area of a circle is A = r2. A = 52. is approximately 3.14, so 3.14 25 means A is approximately 78.5 inches.
68
69
A tube has a radius of 3 inches and a height of 5 inches. What’s its approximate volume?
70
A right triangle has one right angle (one 90-degree angle).
71
Parallelograms have opposite sides of equal length.
72
Angles measuring more than 90 degrees are obtuse angles.
73
A square box has a volume of 64 cubic inches. What’s its perimeter?
Volume equals length times width times height (V = lwh). In this case, V = 64, so one side of the box is 4-inches long. The cube root of 64 produces this number: 64 = 4 x 4 x 4. Find the perimeter by adding the four sides together: 4 + 4 + 4 + 4 = 16.
74
A cube has a volume of 64 cubic inches. What’s its surface area?
Volume is calculated by multiplying length times width times height (V = lwh). Because the edges are equal on a cube, each edge is 4 inches. The cube root of 64 produces this number: 64 = 4 x 4 x 4. The area of one side of the cube is 4 x 4 = 16, and because a cube has 6 sides, you multiply 16 6 to find the surface area of the cube, 96 inches.
75
4! =
4! (4 factorial) = 4 x 3 x 2 x 1 = 24.
76
77
What’s the sum of the integers from 1 to 300?
78
79
Two electrical wires run to a machine. One wire is 6mm thick, and the other is 3mm thick. For the two wires to carry the same current, the larger wire:
Larger wires require less electrical pressure to run current.
80
Which of the following isn’t a component of a DC motor?
Rotor bars are found only on AC induction motors.
81
A current passed through a muscle in the human body causes the muscle to contract. This is known as:
The ability of current to contract muscles is called the physiological effect.
82
In a closed electrical circuit:
In a closed circuit, one terminal is always positive, and the other is always negative.
83
What does RMS stand for?
Root Mean Square is the peak value of voltage multiplied by 0.707 (sine 45)
84
The symbol is a fuse. Fuses are designed to “blow” (melt) if the current flowing through it exceeds a specified value.
85
The television broadcast standard used in the United States is:
NTSC stands for National Television Standards Committee. The system is also used in Japan. PAL and SECAM are used in other countries.
86
The symbol is a lamp. A lamp is a transducer that converts electrical energy to light.
87
When a circuit breaker trips, in what position will you find the operating handle?
Conventional circuit breaker handles have four positions: on, off, trip, and reset. When tripped, the handle moves to the middle position.
88
Which wire is smallest?
The smaller the wire, the larger the number.
89
The symbol stands for transformer. Transformers are used to step up (increase) and step down (decrease) AC voltages.
90
How many paths of electrical flow can be found in a series circuit?
An example of a series circuit would be a string of Christmas lights. If you break the circuit’s path at any point, electricity will stop flowing and the lights will not work
91
A microwave is rated at 1,200 watts. At 120 volts, how much current does it draw?
I (current) = Power (watts)/Effort (volts). In this case, I = 1200/120 = 10 amperes.
92
Electricians use the term low potential to refer to:
Potential equals voltage; low potential is anything less than 600 watts.
93
Which of the following isn’t a conductor of electricity?
Glass is an insulator. Other insulators are plastics, paper, and rubber.
94
The ground wire is always:
Ground wires are always green.
95
To cause a current of 10 amperes to flow through 20-ohm resistance, the voltage needed is:
Ohm’s law states that V = IR. V = 10 20 = 200.
96
Silver is a better conductor than copper. But copper is more often used because of:
Silver is a better conductor, but it’s prohibitively expensive.
97
Electronic circuits that produce high- frequency AC are called:
Oscillators produce high-frequency AC.
98
If you plug an appliance designed for AC into a DC power source, the appliance:
When DC is applied to an AC appliance, the amount of resistance is less, so more cur- rent flows through the wire and heat builds up.
99
If a car uses too much oil, which of the fol- lowing parts may be worn?
(D) piston rings
100
On which automotive system would a “stall test” be performed?
engine
101
The alternator:
supplies power to the battery
102
In which automotive system would you find a “wishbone”?
transmission
103
If the electrolyte solution in a battery is too low, you should add:
distilled water
104
What area of your car should be flushed periodically to maintain optimum performance?
ignition system
105
In a hydraulic brake system, if brake action is soft, a likely explanation is:
Air has gotten into the system.
106
Car restorers often seek NOS parts. What does NOS stand for?
none of the above
107
To make spark plugs work effectively, the coil and breaker:
create a very high voltage of electricity
108
Schrader valves can be found in your car’s:
engine
109
A bent frame causes:
improper tracking
110
In the tire designation 205/55 R 15 92 H, what does the “H” signify?
(D) turning radius
111
A sheet of aluminum should be cut with:
(C) tin snips
112
Hammer faces are commonly made of each of the following materials EXCEPT:
plastic
113
Hammers, mallets, and sledges are all striking tools, but mallets and sledges don’t have
(A) a claw
114
Round objects can be measured most exactly using a:
(C) caliper
115
The best chisel to use when making a circu- lar cut in metal is a:
(D) round chisel
116
18. The term penny is used to designate the:
(B) length of a nail
117
Painting on a surface with too much moisture:
(B) causes bubbling
118
20. To tighten a loose handle on a hammer:
(C) drive another wedge into the head
119
An 8-point saw:
(A) has 8 teeth per inch
120
Concrete is made by mixing:
(D) cement, sand, gravel, and water
121
(D) cut bolts
122
(B) Allen wrench
123
A simple pulley gives a mechanical advan- tage of:
A simple pulley gives no mechanical advantage, although it does make work easier by spreading out the work needed over several tries. So the mechanical advantage is 1.
124
(D). Moving Basket A to the right counterbalances the loss of cherries from Basket B.
125
If a force of 200 pounds is exerted over an area of 10-square inches, what’s the psi?
(C). You can calculate psi as Pressure = Force/Area. So, in this problem, P = 200/10 = 20.
126
If a ramp measures 6 feet in length and 3 feet in height, an object weighing 200 pounds requires how much effort to move using the ramp?
The formula to determine mechanical advantage of an incline plane is Length of Ramp ÷ Height of Ramp = Weight of Object ÷ Effort. Plugging in the numbers gives you:
127
A micrometer is used to measure:
(C). Micrometers measure very small but not microscopic objects.
128
Normally, atmospheric pressure is approximately:
“Normal” atmospheric pressure is 14.7 psi.
129
Gears of unequal size can mesh properly as long as...
...heir teeth are of equal size.
130
Torsion springs:
(C). Torsion springs coil or uncoil and produce a twisting action, not a direct pull.
131
To move a 400-pound crate from the floor of a warehouse to the bed of a truck 4-feet off the ground, the most efficient device to use is a:
To move a heavy object a few feet in height, the incline plane is the most efficient device (of those listed) to use.
132
Water in an engine can cause damage in winter weather because:
Water expands when it freezes, possibly damaging engine components.
133
(C). All the listed parts remain stationary except the lower block.
134
Apply the leverage formula: Length of Effort Arm divided by Length of Resistance Arm = Resistance Force divided by Effort Force. Or:
135
A yellow flame on a gas furnace indicates:
A yellow flame indicates too much fuel or not enough air. More air should be allowed to enter and mix with the gas. Thus, the fuel-air mixture is too rich.
136
If a water tank on a toilet keeps overflowing, the problem is probably a:
The float measures the water level in the tank. If the tank overflows, the float is probably defective.
137
