Deck 12: Designing Mechanical Systems

Question 1

Reciprocal motion is back and forth rotational motion.

Answer 1

False

Question 2

Kinetics studies the action of forces on bodies.

Answer 2

True

Question 3

The ____________________ and slider mechanism is used to change between rotary and reciprocating motions.

Answer 3

crank

Question 4

A clock pendulum and the agitator of a top-loading washing machine move with a(n)____ motion.

A) linear
B) reciprocal
C) rotary
D) oscillating

Question 5

____________________ are toothed wheels fixed to an axle.

Question 6

The Greek letter ____ is used to represent an angle measurement.

A) alpha
B) beta
C) theta
D) sigma

Question 7

A(n)____________________ is a rigid body that is capable of transforming energy to provide a designed motion and force.

Question 8

A mechanical advantage greater than 1 (MA > 1)means that a gain in output force has been achieved by an increase in input motion.

Question 9

The rack and pinion gear system changes a rotary input motion to a(n)____ output motion.

A) linear
B) faster rotary
C) oscillating
D) reciprocal

Question 10

The ____ cam,a circular disk with the axle placed off-center,gives a smooth,harmonic,linear output motion to the follower.

A) pear-shaped
B) eccentric
C) roller
D) twin

Question 11

____ is a force applied over a distance that overcomes some resistance as noted in Newton's laws.

A) Work
B) Motion
C) Momentum
D) Energy

Question 12

A Class ____ lever has the fulcrum between the effort and load.

A) 1
B) 2
C) 3
D) 4

Question 13

____ are very important to mechanisms,because they transmit the input motion or force to the desired output location.

A) VRs
B) Vectors
C) Linkages
D) Levers

Question 14

____________________ ratio (VR)is the relationship between the distance moved by the effort and load.

Question 15

In a kinematic diagram,two elements in relative motion and in contact with each other are known as ____.

A) pairs
B) braces
C) chains
D) links

Question 16

The Watt steam engine was a machine (transformed energy)connected to a ____ (capable of designed movement).

A) fulcrum chain
B) treadle
C) mechanism
D) coordinate system

Question 17

A ____ causes a body (mechanism)to accelerate (move).

A) fulcrum
B) force
C) kinematic chain
D) coordinate system

Question 18

Elements that join pairs together are known as chains.

Question 19

____________________ is a branch of engineering mechanics that studies motion without regard to the force or mass of the things being moved.

Question 20

Plastic gears are stronger than metal gears,but they are more expensive.

Question 21

How are vectors related to the Cartesian coordinate system?

Question 22

If the effort moves 7 m and the load moves 3 m,what is the velocity ratio of the lever?

Question 23

If a lever requires an effort of 60 lbs.to move a load of 140 lbs. ,what is the mechanical advantage?

Question 24

When is a ratchet mechanism used?

Question 25

In a pair of gears,if the output gear has 16 teeth and the input gear has 12 teeth,what is the gear ratio?