Question 1

When is a ratchet mechanism used?

Accepted Answer

When a mechanism must be designed to turn in only one direction,a ratchet mechanism is used.A ratchet mechanism can be used to prevent an axle from turning in the wrong direction.This is often desired when a load is being lifted,such as when an engine is being removed from a car.Without the ratchet,the engine could crash back into the car if the mechanic's hands slipped on the chain.Many different types of automobile jacks also use a ratchet mechanism to protect the operator.
A ratchet mechanism can also be used to convert linear motion to a rotary motion.In this design,the pawl is used to push against the teeth of the ratchet.The amount of rotary motion is determined by the amount the pawl is moved.

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

Velocity

Question 4

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

Accepted Answer

MA = Load/

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

____________________ are toothed wheels fixed to an axle.

Accepted Answer

The answer of ____________________ are toothed wheels fixed to an...

Question 7

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

Accepted Answer

The answer of The ____________________ and slider mechanism is used...

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

VR = distance moved

Question 12

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

Accepted Answer

The answer of A(n)____________________ is a rigid body that is...

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

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

Question 17

Reciprocal motion is back and forth rotational motion.

Accepted Answer

A) True 
 B)False

Question 18

How are vectors related to the Cartesian coordinate system?

Accepted Answer

A vector is characterized as a number of

Question 19

Kinetics studies the action of forces on bodies.

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

GR = number of drive

When is a ratchet mechanism used?

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

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

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

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

____________________ are toothed wheels fixed to an axle.

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

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

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

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

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

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

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

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

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

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

Reciprocal motion is back and forth rotational motion.

How are vectors related to the Cartesian coordinate system?

Kinetics studies the action of forces on bodies.

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

Technology: The Human-Designed World

The Process of Design

Development of the Team

Generating and Developing Ideas

Drawing to Develop Design Ideas

Reverse Engineering

Investigation and Research for Design Development

Technical Drawing

Testing and Evaluating

Manufacturing

Designing Structural Systems

Designing Electrical Systems

Designing Pneumatic Systems

Human Factors in Design and Engineering

Math and Science Applications

Design Styles

Graphics and Presentation

Filters

Exam 12: Designing Mechanical Systems

When is a ratchet mechanism used?

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

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

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

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

____________________ are toothed wheels fixed to an axle.

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

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

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

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

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

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

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

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

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

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

Reciprocal motion is back and forth rotational motion.

How are vectors related to the Cartesian coordinate system?

Kinetics studies the action of forces on bodies.

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

Technology: The Human-Designed World

The Process of Design

Development of the Team

Generating and Developing Ideas

Drawing to Develop Design Ideas

Reverse Engineering

Investigation and Research for Design Development

Technical Drawing

Testing and Evaluating

Manufacturing

Designing Structural Systems

Designing Electrical Systems

Designing Pneumatic Systems

Human Factors in Design and Engineering

Math and Science Applications

Design Styles

Graphics and Presentation

Filters