ASVAB practice test 1
An induction clutch works by - Answer magnetism
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? - Answer 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
- Answer recoil
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? - Answer r = DR/d, r=16.6666
Springs used in machines are usually made of - Answer steel
A clutch is a type of - Answer coupling
A single block-and-fall is called a - Answer runner
The mechanical advantage of the block-and-tackle arrangement shown below is -
Answer 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? - Answer 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? - Answer 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? - Answer Silver is the best conductor, so it becomes hottest
If an alternator overcharges the battery, a likely explanation is - Answer The voltage
regulator isn't working properly
A primary advantage of the electronic ignition system over conventional ignition systems
is - Answer The electronic ignition system provides a higher voltage
The primary purpose of piston rings is to - Answer seal the combustion chamber and
allow the pistons to move freely
Connecting rods connect the piston to the - Answer crankshaft
In an overhead valve system (OHV), what mechanism opens and closes the valves? -
Answer rocker arms
, ASVAB practice test 1
The difference between a single-acting and an opposed piston engine is - Answer
Single-acting piston engines have one piston per cylinder and opposed piston engines
have two
A car equipped with limited-slip differential - Answer transfers the most driving force to
the wheel with the greatest amount of traction
Soft brake-pedal movement can be caused by - Answer air in the hydraulic brake
system
The safest way to make a hole in sheet metal is to - Answer punch it using a metal
punch
Nail sets are used to - Answer set nails below the surface of the wood
A ripsaw cuts - Answer with the grain of the wood
A bucking bar is used to - Answer drive rivets
Washers that have teeth all around the circumference to prevent them from slipping are
called - Answer shakeproof washers
Ohm's law states - Answer Voltage = Current × Resistance. V=IR
An electromagnetic-induction device usually has which of the following materials in its
core - Answer iron
How many diodes should you expect to find in a bridge rectifier? - Answer A bridge
rectifier is also known as a full wave rectifier, usually containing 4 diodes
Another name for cycles per second is: - Answer hertz
When current flows through a wire, the following influences are present - Answer
voltage, ohms, amperes
Millihenries are related to - Answer inductors
Radar can operate at frequencies as high as - Answer 100,000 MHz
Radio waves travel - Answer at the speed of light
Changing alternating current to direct current is called - Answer AC to DC is a process
called rectification
Insulated fittings can be used to splice wires, thus eliminating the need for - Answer
soldering the wires together
An induction clutch works by - Answer magnetism
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? - Answer 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
- Answer recoil
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? - Answer r = DR/d, r=16.6666
Springs used in machines are usually made of - Answer steel
A clutch is a type of - Answer coupling
A single block-and-fall is called a - Answer runner
The mechanical advantage of the block-and-tackle arrangement shown below is -
Answer 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? - Answer 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? - Answer 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? - Answer Silver is the best conductor, so it becomes hottest
If an alternator overcharges the battery, a likely explanation is - Answer The voltage
regulator isn't working properly
A primary advantage of the electronic ignition system over conventional ignition systems
is - Answer The electronic ignition system provides a higher voltage
The primary purpose of piston rings is to - Answer seal the combustion chamber and
allow the pistons to move freely
Connecting rods connect the piston to the - Answer crankshaft
In an overhead valve system (OHV), what mechanism opens and closes the valves? -
Answer rocker arms
, ASVAB practice test 1
The difference between a single-acting and an opposed piston engine is - Answer
Single-acting piston engines have one piston per cylinder and opposed piston engines
have two
A car equipped with limited-slip differential - Answer transfers the most driving force to
the wheel with the greatest amount of traction
Soft brake-pedal movement can be caused by - Answer air in the hydraulic brake
system
The safest way to make a hole in sheet metal is to - Answer punch it using a metal
punch
Nail sets are used to - Answer set nails below the surface of the wood
A ripsaw cuts - Answer with the grain of the wood
A bucking bar is used to - Answer drive rivets
Washers that have teeth all around the circumference to prevent them from slipping are
called - Answer shakeproof washers
Ohm's law states - Answer Voltage = Current × Resistance. V=IR
An electromagnetic-induction device usually has which of the following materials in its
core - Answer iron
How many diodes should you expect to find in a bridge rectifier? - Answer A bridge
rectifier is also known as a full wave rectifier, usually containing 4 diodes
Another name for cycles per second is: - Answer hertz
When current flows through a wire, the following influences are present - Answer
voltage, ohms, amperes
Millihenries are related to - Answer inductors
Radar can operate at frequencies as high as - Answer 100,000 MHz
Radio waves travel - Answer at the speed of light
Changing alternating current to direct current is called - Answer AC to DC is a process
called rectification
Insulated fittings can be used to splice wires, thus eliminating the need for - Answer
soldering the wires together
