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ASVAB practice test 1
Terms in this set (77)
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?
Length of Effort Arm ÷ Length of Resistance Arm. MA = 8 ÷ 2 = 4
The force produced when a boxer's hand hits a heavy bag and "bounces" off it is called
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?
r = DR/d, r=16.6666
Springs used in machines are usually made of
A clutch is a type of
A single block-and-fall is called a
The mechanical advantage of the block-and-tackle arrangement shown below is
2. Because this block-and-tackle arrangement merely changes the direction of the pull, it has a mechanical advantage of only 2.
If a house key, a wooden spoon, a plastic hanger, and a wool jacket are all the same temperature, which one feels the coldest?
The key will feel coldest because metal is a better conductor than the other materials
A way to determine the amount of power being used is?
The formula for determining power is 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?
Silver is the best conductor, so it becomes hottest
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?
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
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
Nail sets are used to
set nails below the surface of the wood
A ripsaw cuts
with the grain of the wood
A bucking bar is used to
Washers that have teeth all around the circumference to prevent them from slipping are called
Ohm's law states
Voltage = Current × Resistance. V=IR
An electromagnetic-induction device usually has which of the following materials in its core
How many diodes should you expect to find in a bridge rectifier?
A bridge rectifier is also known as a full wave rectifier, usually containing 4 diodes
Another name for cycles per second is:
When current flows through a wire, the following influences are present
voltage, ohms, 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
AC to DC is a process called rectification
Insulated fittings can be used to splice wires, thus eliminating the need for
soldering the wires together
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 or, written another way, Current = Power/Voltage. 60/120 = 0.5 ampere
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
opposite of stimulate
opposite of hypocrisy
A series of cell divisions that results in the formation of an embryo is called
The process by which energy is provided at the cellular level is called
Light waves travel at a rate of about
The largest moon in the solar system is
Which inorganic substance is present in the greatest quantity inside animal cells?
Cell protoplasm is made up mostly of:
The chamber of the heart that pumps blood to the lungs is called the
The atomic number of an atom is determined by
# of protons
How many planets in the solar system have rings?
Not counting the sun, the closest star to the Earth is
THIS SET IS OFTEN IN FOLDERS WITH...
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Combo with ASVAB Word Knowledge TEST CARDS and 1 o…
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