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Sample Practice Test Questions
The air-fuel mixture is delivered to the combustion chamber by a(n):
intake valve
The combustion chamber is located in the cylinder head and contains the combustion of the air-fuel mixture. This mixture is delivered by an intake valve and the waste gases from combustion are removed from the combustion chamber by the exhaust valve.
This problem describes an inclined plane and, for an inclined plane, the effort force multiplied by the effort distance equals the resistance force multipied by the resistance distance:
Fede = Frdr
Plugging in the variables from this problem yields:
Fe x 14 ft. = 290 lbs. x 2 ft.
Fe = \( \frac{580 ft⋅lb}{14 ft.} \) = 41.4 lbs.
Which of the following is a characteristic of batteries connected in series?
total voltage equals the sum of the individual battery voltages
You can multiply the voltage or the current supplied by individual batteries by connecting them together either in series or in parallel. The characteristics of batteries connected in series are that total voltage equals the sum of the individual battery voltages, total current equals the average of the individual battery currents, the positive terminal of one battery is connected to the negative terminal of the next, and one connection is made between each adjacent battery.
In fermentation, what replaces oxygen in anaerobic respiration?
lactic acid or alcohol
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Which of the following enables heat transfer from the cylinder heads to the coolant?
water jacket
A water jacket is a coolant-filled casing that allows heat transfer from the engine block and cylinder heads to the liquid coolant.
The catalytic converter output consists primarily of:
water and carbon dioxide
The catalytic converter converts pollutants in exhaust gas into less pollutant substances like carbon dioxide and water.
Changes to an object's speed or direction of motion are caused by which of the following?
a force
Force is applied to change an object's speed or direction of motion.