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Sample Practice Test Questions
Connecting the 10 batteries in series multiplies their voltage while keeping their current the same yielding a 60V 5A configuration. Connecting the 10 batteries in parallel multiplies their current while keeping their voltage the same yielding a 6V 50A configuration. Using a series-parallel connection, 5 batteries can be connected in series and 5 can be connected in parallel resulting in a 30V 25A configuration.
What is -5a6 - a6?
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-5a6 - 1a6
(-5 - 1)a6
-6a6
If a car travels 45 miles in 3 hours, what is the average speed?
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Which of the following regulates the flow of coolant through the radiator?
thermostat
The thermostat controls coolant (and, through it, engine) temperature by regulating the flow of coolant through the radiator. A bypass tube allows coolant to bypass the radiator and flow back into the water pump when its temperature is low enough that the thermostat is closed.
An air mass is a large body of air that has which of the following characteristics?
all of these
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
Solve 3c + 2c = 9c - 9x + 8 for c in terms of x.
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
3c + 2x = 9c - 9x + 8
3c = 9c - 9x + 8 - 2x
3c - 9c = -9x + 8 - 2x
-6c = -11x + 8
c = \( \frac{-11x + 8}{-6} \)
c = \( \frac{-11x}{-6} \) + \( \frac{8}{-6} \)
c = 1\(\frac{5}{6}\)x - 1\(\frac{1}{3}\)
Depending on where you apply effort and resistance, the wheel and axle can multiply:
force or speed
If you apply the resistance to the axle and the effort to the wheel, the wheel and axle will multiply force and if you apply the resistance to the wheel and the effort to the axle, it will multiply speed.
Large, puffy, mid-altitude clouds with a flat base and a rounded top describe which of the following?
cumulus clouds
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.