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# ← Principles of Engineering : Simple MachinesTest

### Question Limit

of 30 available terms

### 5 Matching Questions

1. What is the gear ratio equation?
2. What is the difference between a 1st and 3rd class lever?
3. Is a Mechanical Advantage of 4:1 better or worse than an "advantage" of 1:1
4. What is the difference between a 1st and 2nd class lever?
5. In a 1st class pulley, if the fulcrum is closer to the resistance than the effort, what happens to MA?
1. a Both the effort and resistance are on the same side, with the effort further from the fulcrum than the resistance. MA is always >1.
2. b GR/1 = Nout/Nin = Dout/Din = τout/τin = ωin/ωout
3. c Both the effort and resistance are on the same side, with the effort closer to the fulcrum than the resistance. MA is always <1.
4. d It becomes greater than one
5. e Four times better

### 5 Multiple Choice Questions

1. De/Dr ("distance traveled by effort force/distance traveled bu resistance force")
2. The point which resistance and effort are equal (often seen in a lever)
3. AMA/IMA
4. Force / Weight
5. Diameter

### 5 True/False Questions

1. What does it mean if a Mechanical Advantage is <1There is more effort force required to overcome the resistance

2. What is a Pulley?A lever consisting of a wheel used to change direction and magnitude

3. How do you find Moment?force × distance

4. What is Mechanical Advantage?Ratio of the magnitude of resistance and effort forces

5. In a Wheel and Axle, how do you find De or Dr?2π (length)