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Sample Practice Test Questions
Water has a refractive index of 1.33. Which of the following is true?
light travels 1.33 times faster in a vacuum than it does in water
The speed of light varies based on the material that the waves are passing through. The refractive index of a material indicates how easily light travels through it compared to how easily light travels through a vacuum. For example, the refractive index of water is 1.33, meaning that light travels 1.33 times faster in a vacuum than it does in water.
Elements in the same group in the Periodic Table of the Elements have the same:
number of electrons in their outer electron shell
The columns of the Periodic Table are called groups and all elements in a group have the same number of electrons in their outer electron shell. The group that an element occupies generally determines its chemical properties as the number of outer shell electrons establishes the way it reacts with other elements to form molecules. So, because each element has the same number of electrons in its outer shell, each has similar reactivity.
What type of load doesn't create specific stress points or vary with time?
static uniformly distributed load
A concentrated load acts on a relatively small area of a structure, a static uniformly distributed load doesn't create specific stress points or vary with time, a dynamic load varies with time or affects a structure that experiences a high degree of movement, an impact load is sudden and for a relatively short duration and a non-uniformly distributed load creates different stresses at different locations on a structure.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
products
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Which of the following is the smallest component of an element that still retains the properties of the element?
atom
An atom is the smallest component of an element that still retains the properties of the element.
What's the last gear in a gear train called?
driven gear
A gear train is two or more gears linked together. Gear trains are designed to increase or reduce the speed or torque outpout of a rotating system or change the direction of its output. The first gear in the chain is called the driver and the last gear in the chain the driven gear with the gears between them called idler gears.
Solve for x:
-5x - 3 = \( \frac{x}{-3} \)
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 equal sign and the answer on the other.
-5x - 3 = \( \frac{x}{-3} \)
-3 x (-5x - 3) = x
(-3 x -5x) + (-3 x -3) = x
15x + 9 = x
15x + 9 - x = 0
15x - x = -9
14x = -9
x = \( \frac{-9}{14} \)
x = -\(\frac{9}{14}\)
Which of the following is not a function of the oil pan?
cools engine oil
The oil pan contains the engine oil reservoir of from four to six quarts of oil and feeds the oil pump through the oil pickup tube. An oil strainer floats at the top of the oil in the oil pan and screens debris from the oil before feeding it to the oil pump.
Which of the following saws is not good for cutting wood?
hacksaw
A hacksaw has replaceable blades and is used to cut metal. The blade type is chosen based on the material that is to be cut. Blades with larger numbers of teeth per inch are more appropriate for cutting thinner materials.
For inline cylinder arrangements in an engine, how are the cylinders numbered?
sequentially from the front of the engine to the back
Inline cylinder arrangements number cylinders sequentially (1, 2, 3, ...) front to rear.