Which of these reduces friction
ball bearings
When a lobster grows a claw to replace one that was lost, the process is
... [Show More] called
regeneration
Any astronomical body that revolves around a larger body is called
satellite
In chemistry, to be classified as an organic substance, a substance must contain?
carbon atoms
Which element does NOT contain any neutrons
Hydrogen
The chemical formula of a compound describes the elements the compound contains and the
the ratio of elements in a compound
What is the symbol for the hydroxyl ion
OH-
The Tympanic membranes are also known as the
Ear drum
Which of the following actions produce a chemical change
adding salt to the hot water
Choking is prevented by the
Epiglottis
A perpetual-motion machine can never be built because it is not possible to eliminate
elasticity
Which of the following is a renewable source
...
When scientist measures a liquid's resistance to flow, they are measuring the liquids
Viscosity
Regeneration in man is limited to
Healing of wounds
How many atoms are in a single molecule of water (H2O)
2 atoms
A student bought a sandwich for 80 cents, milk for 20 cent and pie for 30 cents. How much did the meal cost
$1.30
A radar is designed to report the track is an aircraft every semiconductor. If the radar reports 30 tracks in one minute, what percentage of time did the radar track the aircraft?
50%
Jerry walked a dog from 6:40 a.m. to 7:30 a.m. one day. If he was paid at the rate of $6 per hour, how much did he earn that day?
$5.00
A woman is looking for a bigger square office. She finds an office twice the area of her current office. If the perimeter of her current office is 88 feet, how many square feet is the new office?
176 sq ft
If the perimeter of a square garden is 84 feet, what is the area of the garden
441 sq ft
How many feet of chain fence are necessary to enclose a dog pen that is square and has an area of 64 square feet
32
The pet store had 6 puppies selling for $104 each and 12 kittens selling for $24 each. Today, only 2 puppies and 8 kittens were left. In dollar terms, what was the ratio of sales of puppies versus kittens?
13:3
Before being painted, a concrete play area was marked off into squares and then into triangles. For the square shown, what is the area of the triangular part labeled XYZ?
32 sq ft
Five people, each working 8 hours a day can assemble 400 toys in a 5 day work week. what is the average number of toys assembled per hour per person?
16 (used choices to determine that 5*16= 80, and 80 toys per day for 5 days= 400)
If a 5-foot post casts an 8-foot shadow at the same time that a nearby tree casts a 48-foot shadow, how tall is the tree?
30 feet
If 35 of the 140 cars delivered to a dealer were blue, what percent of the cars were blue?
25%
A box of nails weigh 1-5/6 pounds. What is the weight of 12 boxes?
22
If the population of a certain city increased 25% in two years, the new population was what percent of the old?
125%
The price of salmon
$3.60
In making permanent electronic connections use
soldering iron
Silicon chips are used primarily in
integrated circuits
What kind of energy is converted to electrical energy by a car battery
chemical
A standard multimeter does NOT measure?
frequency
When wire conductors are coated with solder, the process is called?
Tinning
Electrical current flowing from one component to the next is an example of what kind of circuit
series
Utility company power lines carry what kind of current
alternating
When measuring resistance with an ohmmeter
Disconnect power
In order to make an electric current flow, it is necessary to have
difference in potential
Which device restricts current flow to a single direction
Diode
The part that revolves in a motor or generator is called the
Armature
The most common used fuel for running automobile engines is
Gasoline
Which of the following is NOT apart of a car's drive train?
Rotor
The function of the master cylinder is to?
Apply hydraulic pressure to the wheel cylinders
The catalytic converter is part of what system?
Emission control system
How many crankshafts are there in a V-8 automobile engine
8
Which engine component stores oil for lubrication?
oil pan
What kind of wrench should be used to tighten engine components such as a manifolds and cylinder heads?
torque
Coolant flow through an engine is regulated by the ..?
thermostat
The starter gear disengages from the car's flywheel to avoid..?
Damage to the starter
A torque wrench is used to tighten a bolt when..?
the exact amount of forces on the bolt has to be measured
Taps and dies are tools to
Cut threads for nuts and bolts
Which tool is used to bend large sections of sheet metal
to brake
Anchor bolts are used to hold the
Rebar to the concrete
Self-tapping screws are primarily used when fastening objects to..?
sheet metal
Paraffin is commonly used to
insulate windows
The best saw for accurately cutting 3inches off the length of a 2x8x18-inch piece of lumber
Radial Arm Saw [Show Less]