A series of cell divisions that results in the formation of an embryo is called ?
An animal that eats only plants is called ?
The process by which energy is provided at the cellular level is called ?
All of the following are domains except ?
Light waves travel at a rate of about ?
186,000 miles per second
The largest moon in the solar system is ?
The spinal cord is part of the ?
Joints that hold bones firmly together are called ?
The top or broadest level of the classification system for living organisms is called ?
If there are two full moons in a single month, the second full moon is called ?
The brainstem connects the brain to the ?
Red blood cells do what ?
Carry oxygen and carbon dioxide
Protein can be found in all of the following foods EXCEPT:
What inorganic substance is present in the greatest quantity inside animal cells?
Cell protoplasm is made up mostly of what ?
A meter consists of how many centimeters ?
It's impossible for the sun to turn into a black hole because ?
It is too small
Electrons are particles that are ?
The chamber of the heart that pumps blood to the lungs is called the?
The atomic number of an atom is determined by ?
The number of protons
The smallest part of an element that still acts like an element is ?
How many planets in the solar system have rings?
The temperature at which a solid becomes a liquid is its?
The surface of the earth is called the ?
Not counting the sun, the closest star to the Earth is ?
How many bottles are in a gross ?
"Jenny's test grades are 93, 89, 96, and 98. If she wishes to raise her average to 95, what does she need to score on her next test?"
(93 + 89 + 96 + 98 + x) ÷ 5 = 95
(376 + x) ÷ 5 = 95
376 + x = 475
x = 99
" A waitress earns an average tip of 12% of the cost of the food she serves. If she serves $375 worth of food in one evening, how much money in tips will she earn on average? "
Multiply the total amount spent on drinks, $375, by 12% to determine the amount of tips.
$375 × 0.12 = $45.
"Carpet stain protector costs $0.65 per square yard to apply. How much will it cost to apply the protectant to a 16-foot × 18-foot carpet?"
multiply 16 feet by 18 feet to determine the number of square feet, 288. Then divide 288 by 9 to convert square feet to square yards (1 square yard = 3 feet × 3 feet = 9 square feet). Multiply the quotient, 32 square yards, by the cost of protection per square yard, $0.65, to get the correct answer, $20.80.
Ohm's law states:
Voltage (V) = Current (I) × Resistance (R)
An electromagnetic-induction device usually has what material in its core?
How many diodes should you expect to find in a bridge rectifier?
Another name for cycles per second is:
When current flows through a wire, what is influenced?
Voltage, ohms, and amperes
Millihenries are related to:
Radar can operate at frequencies as high as:
Radio waves travel:
At the speed of light
Changing alternating current to direct current is called:
Insulated fittings can be used to splice wires, thus eliminating the need for:
Soldering the wires together
12: The symbol shown below stands for:
-------| I | I | I | I---------
How many wires do serial cables used on computers have?
To produce greater storage of electrons and more capacitance, capacitors should:
Be connected in parallel
A light bulb is 60 watts. Operated at 120 volts, how much current does it draw?
Power = Current × Voltage
Current = Power/Voltage. 60/120 = 0.5 ampere
A number-12 wire, compared to a number-6 wire:
Is smaller in diameter
(The larger the number, the smaller (in diameter) the wire.)
A fuse with a higher-than-required rating used in an electrical circuit:
May not work properly
Neutral wire is always:
Whitish or natural
To measure electrical power, you would use a(n):
(Electrical power is measured in watts, so you use a wattmeter)
If you operate an incandescent light bulb at less than its rated voltage:
The bulb will burn dimmer and last longer.
If an alternator overcharges the battery, a likely explanation is:
The voltage regulator isn't working properly.
A primary advantage of the electronic ignition system over conventional ignition systems is:
The electronic ignition system provides a higher voltage.
The primary purpose of piston rings is to:
Seal the combustion chamber and allow the pistons to move freely
Connecting rods connect the piston to the:
In an overhead valve system (OHV), what mechanism opens and closes the valves?
If a car's ignition system, lights, and radio don't work, the part that's probably malfunctioned is the:
A gauge shows the complete loss of oil pressure while driving. The best action is to:
Pull over immediately and investigate the problem.
A two-cycle engine will normally be found on:
Snowmobiles, chainsaws, and some motorcycles
The difference between a single-acting and an opposed piston engine is:
Single-acting piston engines have one piston per cylinder and opposed piston engines have two.
A car equipped with limited-slip differential:
Transfers the most driving force to the wheel with the greatest amount of traction
Pouring cold water on an overheated engine:
Could cause the engine block to crack
Soft brake-pedal movement can be caused by:
Air in the hydraulic brake system
The safest way to make a hole in sheet metal is to:
Punch it using a metal punch
Rebar is used to:
Nail sets are used to:
Set nails below the surface of wood
A ripsaw cuts:
With the grain of the wood
Sledges can be used to drive:
Bolts and chisels
To check for horizontal trueness, the best tool to use is a:
A bucking bar is used to:
Washers that have teeth all around the circumference to prevent them from slipping are called:
An induction clutch works by:
If a first class lever with a resistance arm measuring 2 feet and an effort arm measuring 8 feet are being used, what's the mechanical advantage?
Mechanical advantage can be calculated as Length of Effort Arm ÷ Length of Resistance Arm. MA = 8 ÷ 2 = 4.
Air weighs about 15 psi. What's the amount of pressure (force) exerted on the top of your head, given a surface area of 24 inches?
Power equals force divided by area in square inches (P = F/A or F = A × P.
F = 15 × 24 = 360 pounds.
The force produced when a boxer's hand hits a heavy bag and "bounces" off it is called:
In the figure below, if Gear 1 has 25 teeth and Gear 2 has 15 teeth, how many revolutions does Gear 2 make for every 10 revolutions Gear 1 makes?
Multiply the number of teeth Gear 1 has (D) and the number of revolutions it makes (R). Divide that number by the number of teeth Gear 2 has (d) to determine the number of revolutions Gear 2 makes (r).
r = DR/d
r = (25 × 10)/15
r = 250⁄15, or 1610⁄15, or 162⁄3
Springs used in machines are usually made of:
A clutch is a type of:
A single block-and-fall is called a:
If a house key, a wooden spoon, a plastic hanger,and a wool jacket are all the same temperature, which one feels the coldest?
A way to determine the amount of power being used is to:
Divide the amount of work done by the amount of time it takes.
Power = Work ÷ Time.
A wood tool, a silver tool, and a steel tool are placed in boiling water for cleaning. Which tool gets the hottest?
The ovaries produce:
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
Muscles attach to bone with:
Atoms are most tightly packed in:
Blood leaving the lungs is:
Mitosis is a process of:
8: When added to a cloud's name, what means rain?
The movement of particles from an area of high concentration to an area of lower concentration is called
The instrument used to measure wind speed is:
Electric charges can be:
Positive or negative
Which planet in the solar system has the most moons?
Hydrogen has the atomic number 1. This means that hydrogen has:
Which U.S. space program is responsible for putting 12 men on the moon?
Organisms that eat other organisms are called:
Unlike most other fish, sharks have no:
What human organ is responsible for cleaning the blood?
Kinetic energy is the energy that:
Is possessed by a moving object
In what year did the first woman travel in space?
A step-up transformer:
Increases the voltage in a power line
What animal has the heaviest brain?
Passing sunlight through a prism:
Separates the colors into a spectrum
Molecules are created when:
Atoms combine together
The first genetically engineered organism was:
The vernal equinox is:
The first day of spring
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:
requires less voltage
A current passed through a muscle in the human body causes the muscle to contract. This is known as:
the physiological effect of current
In a closed electrical circuit:
One terminal is always positive, and one terminal is always negative.
What does RMS stand for?
Root Mean Square
The television broadcast standard used in the United States is:
NTSC stands for National Television Standards Committee.
When a circuit breaker trips, in what position will you find the operating handle?
half way between on and off
How many paths of electrical flow can be found in a series circuit?
Electricians use the term low potential to refer to:
600 watts or less
What is not a conductor of electricity?
The ground wire is always:
Silver is a better conductor than copper. But copper is more often used because of:
the cost of silver
Electronic circuits that produce high-frequency AC are called:
If you plug an appliance designed for AC into a DC power source, the appliance:
will produce excessive heat
If a car uses too much oil, which of the following parts may be worn?
On which automotive system would a "stall test" be performed?
supplies power to the battery
In which automotive system would you find a "wishbone"?
If the electrolyte solution in a battery is too low, you should add:
What area of your car should be flushed periodically to maintain optimum performance?
In a hydraulic brake system, if brake action is soft, a likely explanation is:
Air has gotten into the system.
Car restorers often seek NOS parts. What does NOS stand for?
New Old Stock
To make spark plugs work effectively, the coil and breaker:
create a very high voltage of electricity
Schrader valves can be found in your car's:
A bent frame causes:
In the tire designation 205/55 R 15 92 H, what does the "H" signify?
A sheet of aluminum should be cut with:
Hammer faces are commonly made of each of the following materials EXCEPT:
Hammers, mallets, and sledges are all ¬striking tools, but mallets and sledges don't have:
Round objects can be measured most exactly using a:
The best chisel to use when making a circular cut in metal is a:
The term penny is used to designate the:
length of a nail
Painting on a surface with too much moisture:
To tighten a loose handle on a hammer:
drive another wedge into the head
An 8-point saw:
has 8 teeth per inch
Concrete is made by mixing:
cement, sand, gravel, and water
The moon completes a revolution around the earth approximately every:
Carcinogens are chemicals that cause:
A paramecium is:
a one-celled organism
What large halogen is essential for the function of the thyroid gland?
The brainstem controls:
most muscle movements
What element is the most abundant one in the atmosphere?
Minerals are necessary for:
What's the only metallic element commonly found as a liquid?
is smaller than a kilogram
The Aurora Borealis can be seen only in the:
The three important properties of sound waves are:
wavelength, frequency, and speed
Between what two planets can most of the asteroids in the solar system be found?
Mars and Jupiter
At room temperature, an element is a:
liquid, gas, or solid
The elements hydrogen and helium comprise what percentage of almost all matter in the Universe?
Compounds are created when:
atoms of two or more different elements are combined
What theory suggests the Universe will come to an end when its ever-increasing rate of expansion causes all matter to fly apart?
The Big Rip
A watt measures:
how much electricity is consumed
Gas particles move:
more quickly than liquid particles
Absolute zero is:
-263 degrees Celsius
What does the term forensic mean?
Pertaining to law
A lunar eclipse occurs when:
the moon moves into the earth's shadow
What chemical can be used to detect blood, even if it's been wiped from a surface?
What effect does a speaker wire's gauge have on speaker sound quality?
lower gauge wires are thicker with better sound quality
What's the primary advantage of a quad-band cell phone over a dual-band cell phone?
When working with electricity, you should assume that all electrical equipment is alive unless you know for certain otherwise. This prevents:
The heat effect of current is created:
when the current overcomes resistance in the wire, creating heat
What special type of diode is commonly used to regulate voltage?
Electromotive force is another way of saying:
A primary advantage of using a Li-Ion battery instead of a NiMH battery in your cell phone is:
Li-Ion batteries are lighter
Transistors contain at least three terminals called the:
base, emitter, and collector
To control a light fixture from two different wall switches, you should use:
two three-way switches
A transistor is also called a:
To decrease capacitance, capacitors:
should be connected in series
A resistor marked 2.5K ohms has the value of:
A 9-volt transistor contains:
The hot wire is always:
How wide is the full AT motherboard?
A symptom of worn piston rings is:
an engine using excessive amounts of oil
What term refers to the rebuilding of an engine to precise factory specifications?
The number of cranks a crankshaft has on a V-8 engine is:
When an engine runs on after the ignition key is turned off, it's called:
If a radiator fails, the engine:
can quickly overheat
On modern automobile engines, what's the purpose of the intake manifold?
connect the air/fuel management device to the head
Brake systems work by:
applying friction to the wheels to stop their rotation
A catalytic converter:
reduces dangerous exhaust emissions
If the steering wheel vibrates at high speeds, the most likely problem is:
front tire balance
During the compression stroke on a four-cycle engine:
The intake valve closes, and the piston moves to the top of the cylinder.
On older cars, the air filter can be found:
on top of the engine
Glazing is the process of:
using putty to hold glass to a window frame
A wrench with fixed, open jaws is called a(n):
All hammers have a:
head, face, and handle
To determine the number of threads per inch on a fastener, use a:
To chip or cut wood in close, the best tool is a:
fasten metal parts
Double-headed nails are used:
on temporary construction
To thin paint, use:
When finishing a piece of wood, it's best to sand:
with the grain
To measure an angle other than a 90-degree angle, the best tool to use is a: