Robotics II Unit 5 Review

An autonomous robot is one that:

• a. Has mechanisms to perform a variety of operations.

• b. Is able to respond to joystick commands.

• c. Uses its own intelligence or program to handle different situations.

• d. Requires a human operator to carry out its tasks.

Which of the following is NOT a property of equilibrium?

• a. Sum of the forces = 0.

• b. Sum of the displacements = 0.

• c. The object is at rest.

• d. Sum of the torques = 0.

In a mechanical system comprised of a motor, a gear train, a lifting arm, and a specified load force on the arm, what is the first step in calculating the required gear ratio to lift the load?

• a. Sum the torques of the drive motors.

• b. Sum the forces at the free end of the arm.

• c. Sum the torques about the free end of the arm.

• d. Sum the torques about the arm pivot.

What is the worst-case scenario used to calculate maximum lifting capacity of an arm?

• a. Arm lowered at a 15-degree angle below horizontal.

• b. Arm raised at a 45-degree angle above horizontal.

• c. Arm extended vertically.

• d. Arm extended horizontally.

Which of the following is a method for finding the center of gravity of an object?

• a. Float the object in water.

• b. Find the balance point of the object.

• c. Hang the object in two orientations.

• d. Spin the object and find its axis of rotation.

When we are considering three-dimensional motion (motion in the real world), how many degrees of freedom do we consider?

• a. Six translational and three rotational.

• b. Three translational and three rotational.

• c. Six translational and six rotational.

• d. Three translational and six rotational.

In a mechanical system comprised of a motor, a gear train, a moment arm, and a load, which of the following is NOT required to calculate the lifting capacity?

• a. Arm length.

• b. Arm width.

• c. Gear ratio.

• d. Motor torque.

When we are considering two-dimensional motion (motion in a flat plane), how many degrees of freedom do we consider?

• a. One translational and two rotational.

• b. Two translational and one rotational.

• c. One translational and one rotational.

• d. Two translational and two rotational.

What is the equation for calculating torque?

• a. T = force–distance

• b. T = force+distance

• c. T = force/distance

• d. T = force*distance

Which of the following is NOT a way to increase the weight-carrying capacity of a gripper?

• a. Increase the friction coefficient.

• b. Decrease the friction coefficient.

• c. Increase the force.

• d. Change the angle that the force is applied.