ASVAB practice test 1
An induction clutch works by
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?
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
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?
r = DR/d, r=16.6666
Springs used in machines are usually made of
steel
A clutch is a type of
coupling
A single block-and-fall is called a
runner
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
crankshaft
In an overhead valve system (OHV), what mechanism opens and closes the
valves?
rocker arms
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
An induction clutch works by
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?
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
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?
r = DR/d, r=16.6666
Springs used in machines are usually made of
steel
A clutch is a type of
coupling
A single block-and-fall is called a
runner
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
crankshaft
In an overhead valve system (OHV), what mechanism opens and closes the
valves?
rocker arms
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
