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Protein can be found in all of the following foods EXCEPT:
"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.
Insulated fittings can be used to splice wires, thus eliminating the need for:
Soldering the wires together
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.)
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
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.
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
Washers that have teeth all around the circumference to prevent them from slipping are called:
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.
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
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?
An earthquake that measures 4 on the Richter Scale would be how many times stronger than an earthquake that measured 2?
The movement of particles from an area of high concentration to an area of lower concentration is called
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.
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
Silver is a better conductor than copper. But copper is more often used because of:
the cost of silver
If you plug an appliance designed for AC into a DC power source, the appliance:
will produce excessive heat
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.
To make spark plugs work effectively, the coil and breaker:
create a very high voltage of electricity
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
What effect does a speaker wire's gauge have on speaker sound quality?
lower gauge wires are thicker with better sound quality
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
A primary advantage of using a Li-Ion battery instead of a NiMH battery in your cell phone is:
Li-Ion batteries are lighter
On modern automobile engines, what's the purpose of the intake manifold?
connect the air/fuel management device to the head
During the compression stroke on a four-cycle engine:
The intake valve closes, and the piston moves to the top of the cylinder.
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