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Sample Practice Test Questions
Which of the following receive signals from the powertrain control module (PCM) and carry out its instructions?
actuators
Actuators receive signals from the PCM and carry out adjustments needed based on the data the PCM received from the sensors.
The mass of an object correlates to the size of the object but ultimately depends on:
the object's density
Mass is a measure of the amount of matter in an object. In general, larger objects have larger mass than smaller objects but mass ultimately depends on how compact (dense) a substance is.
Elements in the Periodic Table of the Elements are ordered by which of the following?
atomic number
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
Which of the following is the narrowest classification of life?
species
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
The science that deals with motion and the forces that produce motion is called which of the following?
mechanics
Mechanics deals with motion and the forces that produce motion.
The biosphere consists of which of the following?
all of these
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).
What is the potential difference in an electrical circuit a measure of?
the voltage at a specific location in the circuit
Electrons flow from an area of high concentration to an area of low concentration. A high voltage indicates a high concentration of electrons that creates a greater potential for electron flow than a low voltage. When applied to a load, voltage creates electricity and potential difference is the measure of voltage at a specific location in an electrical circuit.
Solve for x:
2x + 2 < 8 - 8x
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the < sign and the answer on the other.
2x + 2 < 8 - 8x
2x < 8 - 8x - 2
2x + 8x < 8 - 2
10x < 6
x < \( \frac{6}{10} \)
x < \(\frac{3}{5}\)