Principles Of Engineering Final Examination

Part A Spring 2009 PRACTICE EXAM

Student Name: ___________________________________ Date: _____________________ Class Period: _____________ Total Points:

____________/40

Converted Score: ____________/50

Project Lead The Way® Copyright 2006 - Page 1 of 7

Directions: Part A is a closed-notebook, closed-book test. No software applications may be used to assist you during this test. You are allowed one sheet (8.5 x 11 inch) of paper with hand-written notes on one side only. You have 45 minutes to answer the following 40 questions. Circle the letter that best answers each question. Then, fill in the Part A answer sheet. 1.

Which of the following engineering achievements occurred first? A. Development of the catapult. C. Development of stone bridges that incorporated wood stringers. B. Development of methods to D. Development of the water wheel. create fire at will.

2.

Compared to engineering technology, engineering ______________ at the college level. A. requires more electives C. has a greater focus on teamwork B. requires a co-op experience D. has a greater focus on theory

3.

The _________________ drawing, shown in Figure 1, provides a three-dimensional pictorial representation of an object. The surface features or the axes of the object are drawn at equal angles from the horizontal. A. oblique C. orthographic B. auxiliary D. isometric Figure 1

4.

_________________ is freehand drawing, which is done without the use of drafting equipment. A. CAD C. Sketching B. Dodging D. Board drafting

5.

The image shown in Figure 2 represents a ________. A. bar chart. C. line graph. B. pie chart. D. spreadsheet. Figure 2

Project Lead The Way® Copyright 2006 - Page 2 of 7

6.

7.

Design is ____________. A. a plan or process that is used as a guide in the development of solutions to problems. B. a tool that is used only by engineers.

C.

D.

a computer software program that is used by engineers to generate 3dimensional models of solutions. a method of generating ideas through unrestrained spontaneous group discussion.

The gear train in Figure 3 consists of a 40-tooth (input), 20-tooth, and 30-tooth (output) gear. If the input gear rotates 10 times, how many times will the output gear rotate? A. 7.5 times C. 15 times B. 13.3 times D. 20 times

Figure 3

8.

In a third class lever, the distance from the effort to the fulcrum is ____________ the distance from the load/resistance to the fulcrum. A. less than C. greater than B. less than or equal to D. greater than or equal to

9.

The wheels on a bicycle have a 10” radius. If the bike must travel exactly 2000”, how many revolutions are required? Assume that no sliding or slipping occurs between the wheel and the road. A. 31.8 C. 314 B. 62.8 D. 31.4

10.

If a simple machine requires an effort force that is less than the force of the load being moved, then that simple machine exhibits ______________. A. rotary motion. C. mechanical advantage. B. linear motion. D. static equilibrium.

11.

When used to pry open a can of paint (see Figure 4), a screwdriver functions as __________. A. a wheel and axle. C. an inclined plane. B. a screw. D. a lever.

Figure 4

Project Lead The Way® Copyright 2006 - Page 3 of 7

12.

If the pulley system shown in Figure 5 is lifting a 50 lb. load, what is the minimum amount of effort that must be applied to the system? A. 1 lb. C. 10 lbs. B. 8.33 lbs. D. 50 lbs. Figure 5

13.

Which of the following methods of heat transfer explains why air near the ceiling is warmer than the air near the floor in an enclosed room? A. Convection C. Radiation B. Conduction D. R-value

14.

Oil is used in industrial hydraulic systems, because ______________. A. it keeps the system cool. C. it can be vented to the atmosphere. B. it does not compress. D. it is environmentally safe.

15.

According to Pascal’s Law, a force that is exerted on a fluid will be transferred ___________ against the walls of that fluid’s container. A. fluidly C. partially B. inversely D. equally

16.

Electromotive force is another term for ________. A. current. C. resistance. B. RPMs. D. voltage.

Figure 6 17.

If the motor in Figure 6 draws 0.09 Amps and provides 100 Ohms of resistance, how many Volts should the multimeter read? A. 0.9 C. 90 B. 9 D. 900

18.

Which of the following digital control devices processes the input information from sensors? A. Microprocessor C. Algorithm B. Variable Resistor D. Flowchart Program

Project Lead The Way® Copyright 2006 - Page 4 of 7

19.

This Fischertechnik™ switch shown in Figure 7 is wired normally______________. A. common. C. closed. B. open. D. neutral.

Figure 7

20.

The difference between an open- and closed-loop system is open-loop systems do not have ____________. A. input. C. feedback. B. process. D. output.

21.

Which of the following input devices can be used to help a computer identify the color of a glass marble? A. Reed Switch C. Electromagnet B. Photoresistor D. Lamp

22.

As shown in Figure 8, a __________ force has the same effect on a body as two or more forces acting concurrently on that body. A. compressive C. resultant B. tensile D. reaction Figure 8 Force and velocity are examples of _________. A. vector quantities. C. mass properties. B. scalar quantities. D. moments.

23.

24.

When the sum of the forces and moments in a structural system equals zero, that system is said to be in a state of __________ equilibrium. A. stress C. dynamic B. strain D. static 500 N B 2m

25.

26.

Study the truss system shown in Figure 9. How many reaction forces would replace the roller joint (C) if a free body diagram of the truss system was drawn? A. 1 C. 3 B. 2 D. 4

45° A

C 2m

Figure 9

Moment of inertia is a cross-sectional property that gives the engineer an indication of the stiffness of a particular shape. Its value can be used to _______________. A. calculate the amount of C. locate the centroidal axis of a deflection that occurs in structural shape. structural beams. B. calculate the weight of a D. describe the linear relationship structural beam. between stress and strain.

Project Lead The Way® Copyright 2006 - Page 5 of 7

27.

Which of the following materials is best known for its resistance to extreme heat? A. Metals C. Ceramics B. Polymers D. Organic 100 lbs

28.

Figure 10 shows a 100 lb. normal force being applied to a 12” long x 10” diameter cylinder. What is the resulting compressive stress in the cylinder? A. 10 psi C. 0.88 psi B. 8.33 psi D. 1.27 psi

Figure 10

29.

Which of the following manufacturing tools is used almost exclusively to machine holes in parts? A. Drill Press C. Lathe B. Injection Molder D. Milling Machine

30.

Which of the following manufacturing processes is used to form a piece of metal into a predetermined shape through the application of pressure? A. Turning C. Annealing B. Forging D. Threading

31.

A POE teacher kept statistics on the success rate of her students’ performances with their marble sorter projects. The number of successfully sorted marbles from the groups was: 1, 2, 7, 9, 8, 8, 10, 5, 9, and 9. Which of the following represents the median of the data set? A. 7 C. 9 B. 8 D. 10

32.

The dial caliper in Figure 11 is showing a measurement of __________ inches. A. 0.775 C. 0.738 B. 0.838 D. 0.875

Figure 11

Project Lead The Way® Copyright 2006 - Page 6 of 7

33.

When a part is stressed only within its elastic region, it will _________ when the stress is removed. A. break C. remain elongated B. return to its original size and D. become smaller than its original size shape and shape

34.

A material that is capable of considerable plastic deformation would be referred to as a ____________ material. A. brittle C. tensile B. polymer D. ductile

35.

Four common causes of product failure are poor design, poor construction, poorly communicated operating instructions, and _____________. A. insufficient power supply. C. operator error or misuse. B. electronics failure. D. excessive mathematical analysis.

36.

___________ provide a means for analyzing documented events such as engineering disasters, and the ethical dilemmas associated with them. A. Resumes C. Free body diagrams B. Design briefs D. Case studies

37.

____________ is the study of motion without reference to the forces that cause the motion. A. Statics C. Mechanics B. Kinematics D. Kinetics

38.

A projectile is any moving object upon which the only active force is ___________. A. wind. C. mechanical actuation. B. magnetism. D. gravity.

39.

Neglecting air resistance, the horizontal component velocity of a projectile that moves along the path of a parabolic curve will ____________. A. increase. C. remain constant. B. decrease. D. fluctuate.

40.

Neglecting air resistance, which of the following trajectory angles (measured from the horizon) will result in the greatest horizontal distance traveled by a projectile? A. 10° C. 70° B. 40° D. 90°

Project Lead The Way® Copyright 2006 - Page 7 of 7