Association of International Motion Engineers
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Overview Sample Questions

1. Convert the complex number 3 + 4j to polar form.

A.

B.

C.

D.

E.

2. Given the initial orientation of a stationary robot, to compute a specified joint desired tool tip position it is necessary to solve the robot's

  1. inverse kinematic equations
  2. kinematic equations
  3. dynamic equations
  4. inverse dynamic equations
  5. phase equations

3. Which formula(s) define the efficiency of a simple machine?

  1. Efficiency = Actual Mechanical Advantage ÷ Theoretical Mechanical Advantage
  2. Efficiency = Theoretical Mechanical Advantage ÷ Actual Mechanical Advantage
  3. Efficiency = Energy In ÷ Energy Out
  4. Efficiency = Power In ÷ Power Out
  5. Efficiency = Energy Out ÷ Energy In

4. Which of the following are properly classified as simple machines?

  1. lever
  2. cam
  3. pulley
  4. screw
  5. DC brush motor
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5. In the vast majority of "smart motion" positioning applications, which of the following is of primary importance?

  1. positioning repeatability
  2. positioning resolution
  3. positioning accuracy
  4. lost motion
  5. settling time

6. Which of the following is not SI base units?

  1. volt
  2. ampere
  3. meter
  4. kilogram
  5. second

7. Convert 2*10-3 kg-m2 to units of in-lb-s2.

  1. 0.0037 in-lb-s2
  2. 6.8 in-lb-s2
  3. 0.45 in-lb-s2
  4. 0.0074 in-lb-s2
  5. 0.0018 in-lb-s2

8. How many radians are in 360 degrees?

  1. 6.28
  2. 1130.97
  3. 3.14
  4. 2261
  5. 57.3

9. Which of the following are not properly classified as "simple" machines?

  1. cam
  2. lever
  3. inclined plane
  4. hydraulic press
  5. generator

10. Which is a characteristic of a robust system?

  1. it can tolerate large variations in load
  2. it can only be achieved with a "pole placement" strategy
  3. it employs automatic tuning
  4. it employs adaptive control strategies
  5. it is based on optimal control principles

11. A block diagram is used to

  1. develop the system transfer function
  2. identify components in the system
  3. show system interconnection
  4. identify part numbers
  5. determine communication requirements

12. A system transfer function may be used to determine...

  1. system stability
  2. system cost
  3. system reliability
  4. the robustness of the system
  5. system frequency response

13. Electronic performance and long term reliability is limited by

  1. operating temperature environment
  2. operating voltage
  3. age of the technology
  4. whether it is analog or digital technology
  5. output current

14. What are four main motion control power technologies?

  1. electrical, mechanical, hydraulic and pneumatic
  2. electrical, mechanical, fluid and thermal
  3. mechanical, hydraulic, pneumatic and dynamic
  4. electromechanical, fluid, thermal and inertial
  5. dynamic, fluid, inertial and digital

15. When selecting a stepper motor / drive system for most in-plant applications, what minimum safety margin should be used?

  1. 50%
  2. 25%
  3. 10%
  4. 100%
  5. 5%

16. A basic motion control system includes all of the following components except...

  1. air compressor
  2. transducers
  3. motion controller
  4. actuator
  5. drive electronics

16. In picking up a cup of coffee, the eye acts like which component in a closed-loop position control system?

  1. Transducer
  2. Actuator
  3. Adaptive motion controller
  4. Interconnect system
  5. Drive electronics

17. Operator Interface components include all of the following except...

  1. motion controller.
  2. touch CRT display screen.
  3. lighted push button switch.
  4. Meter displays.
  5. Audio alert devices.

18. What are the primary motion control technologies?

  1. electromechanical, electrohydraulic, electromechanical and electropheumatic
  2. electrical, signal processing, fluids and mechanical
  3. linear motors, stepper motors, rotating motors and mechanical
  4. linear, angular, electromechanical and mechanical
  5. electrical, hydraulic, electromechanical and electropheumatic

19.  Open loop systems have...

  1. command input and output proportional to the input signal.
  2. command input, output proportional to the feedback signal.
  3. command input and output proportional to the error signal.
  4. output based on load disturbances.
  5. automatic gain adjustments to compensate for load inertia.

20. Open loop systems are suitable for...

  1. adjusting non-critical conveyor belt speeds in simple material handling systems.
  2. high precision machining applications.
  3. critical position loop control.
  4. multi-axis, synchronous control material transfer machines.
  5. adjusting the non-critical conveyor belt speeds due to load and temperature changes.

21. Commercial electronics thermal characteristics are limited by a junction rating of

  1. 70° C.
  2. 25° C.
  3. 125° C.
  4. 212° F.
  5. 75° F.

22. Motor failure due to high temperature is rarely instantaneous because...

  1. the coil insulation degrades by 50% for each ten degrees over the nominal specification.
  2. motor speed is inverse to the excess temperature
  3. magnetic circuit; higher temperature reduces the H-field.
  4. commutators are unaffected by temperature changes.
  5. temperature excesses cause only minor mechanical dimensional changes.

23. The transfer function is a...

  1. mathematical expression of the input / output relationship.
  2. specification of the moving parts from one position to another.
  3. computer program used to control a trajectory profile.
  4. not measurable in the laboratory.
  5. may only be defined using time dependent variables.

Page Revised: July 14, 2003