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Sample Practice Test Questions
A ramp is an example of which kind of simple machine?
inclined plane
An inclined plane is a simple machine that reduces the force needed to raise an object to a certain height. Work equals force x distance and, by increasing the distance that the object travels, an inclined plane reduces the force necessary to raise it to a particular height. In this case, the mechanical advantage is to make the task easier. An example of an inclined plane is a ramp.
This tool is a(n) __________.
adjustable wrench
Wrenches are used to provide grip and mechanical advantage by applying torque to turn objects (or to keep them from turning). The longer the wrench, the more torque that can be applied. Wrench ends are available in two primary types, open-end and box-end. A box-end wrench encloses the bolt head and is useful when more torque is needed or to maintain contact in difficult to reach locations. An open-end wrench is designed for speedily loosening easier to reach fasteners. Wrenches that feature one open and one box end are called combination wrenches and adjustable wrenches feature an open end with an adjustable width.
What is the least common multiple of 6 and 12?
The first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60] and the first few multiples of 12 are [12, 24, 36, 48, 60, 72, 84, 96]. The first few multiples they share are [12, 24, 36, 48, 60] making 12 the smallest multiple 6 and 12 have in common.
Solve 3a + 2a = 9a - 9y + 8 for a in terms of y.
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
3a + 2y = 9a - 9y + 8
3a = 9a - 9y + 8 - 2y
3a - 9a = -9y + 8 - 2y
-6a = -11y + 8
a = \( \frac{-11y + 8}{-6} \)
a = \( \frac{-11y}{-6} \) + \( \frac{8}{-6} \)
a = 1\(\frac{5}{6}\)y - 1\(\frac{1}{3}\)
Which of these digestive enzymes is not produced by the pancreas?
gastric acid
The acids produced by the pancreas contain several enzymes that aid in digestion. Lipase converts fat to glycerol and fatty acids. Pancreatic amylase breaks down complex carbohydrates into simple sugars. Trypsin converts polypeptides (the building blocks of protein) into amino acids.
Another name for a reciprocating engine is a(n):
piston engine
A reciprocating engine is an engine whose crankshaft is turned by pistons moving up and down in a cylinder.
You are using a hacksaw to cut a Class 8 bolt. What is the most appropriate TPI for your saw blade?
18 TPI
A Class 8 bolt is made of very hard metal and larger TPI saw blades are most appropriate for very hard metals.