Test your basic knowledge |

Mechanical Systems 3

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is one type of second class lever?
2(pie)/pitch
1
Count the number of parts of the rope going to and from the movable block.
Wheel and axle.

2. What is the jack screw used for?
Find the resistance weight and divide that by the effort you need to lift the weight. M.A=R/E - This rule applies to all machines.
The force used to overcome friction is greater than the force used to do useful work.
The change of the direction of the pull.
To raise a house or other heavy machinery.

3. A miter gear connects what?
Simple machine
Connects shafts having a 90 degree angle.
Find the resistance weight and divide that by the effort you need to lift the weight. M.A=R/E - This rule applies to all machines.
Work=Force*Distance

4. The threads of a screw are cut so?
Wheel and axle.
Third class lever.
The force used to overcome friction is greater than the force used to do useful work.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.

5. What is the purpose of a third class lever?
In Horsepower.
Opposite.
2. Each half of the rope carries an equal amount of weight.
To speed up the motion of resistence.

6. What is another example of a wheel and axle?
your arm.
Door knob.
The change of the direction of the pull.
Positive mechanical advantage.

7. What is the formula for the mechanical advantage of a screw?
Foot- pounds
2(pie)/pitch
When a resistance is overcome by a force acting through a measurable distance.
Can change the direction of motion.

8. Work is measured in units also known as?
2. Each half of the rope carries an equal amount of weight.
Foot- pounds
Third class lever.
With oil - grease or soap.

9. What is the work formula?
With oil - grease or soap.
Work=Force*Distance
In pounds.
Wheel and axle.

10. What kind of machine is the inclined plane?
Direction - speed or size of the force applied.
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle
Increase or decrease the the speed of the applied motion.
Simple machine

11. What does a micrometer measure?
Less than 1.
Third class lever.
A few thousandths of an inch.
Gravity - Magnetism - Friction - Recoil

12. Formula for fractional mechanical disadvantage.
Simple machine
Effort arm/Resistance arm - A/a - An expression of the ratio of the applied force and the resistance.
A modification of an inclined plane.
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.

13. How do you measure power?
Two surfaces move against one another.
To raise a house or other heavy machinery.
A modification of an inclined plane.
In Horsepower.

14. What is an example of a third class lever?
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
Increase or decrease the the speed of the applied motion.
your arm.
The change of the direction of the pull.

15. What direction does the effort and resistance move in first class levers?
Length of ramp/length of height from floor to truck
The force used to overcome friction is greater than the force used to do useful work.
Opposite.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.

16. hat is a screw?
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
Foot- pounds
A modification of an inclined plane.
The rope that passes through your hands is greater than the distance that the load is raised.

17. What are the 4 forces?
The rope that passes through your hands is greater than the distance that the load is raised.
Gravity - Magnetism - Friction - Recoil
2. Each half of the rope carries an equal amount of weight.
Power=Work/Time

18. An egg beater has a mechanical advantage of what?
Less than 1.
2. Each half of the rope carries an equal amount of weight.
Simple machine
Wheel and axle.

19. With a single fixed sheave what is the only mechanical advantage?
your arm.
Increase or decrease the the speed of the applied motion.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.
The change of the direction of the pull.

20. How do you find the mechanical advantage?
fulcrum- weight- effort
Simple machine
Find the resistance weight and divide that by the effort you need to lift the weight. M.A=R/E - This rule applies to all machines.
your arm.

21. What is the power formula?
Third class lever.
Same.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
Power=Work/Time

22. How is force measured in work?
The force used to overcome friction is greater than the force used to do useful work.
The change of the direction of the pull.
In pounds.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.

23. What is the lever formula?
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
your arm.
Door knob.
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle

24. The bevel gear is used to connect what?
Length of ramp/length of height from floor to truck
Mechanical disadvantage. Use more force than the force of the load you lift.
1
Shafts lying at any given angle.

25. What is the second thing a gear can do?
Power=Work/Time
Door knob.
Increase or decrease the the speed of the applied motion.
Feet.

26. Belt drive Gear 1 has 32 teeth and gear 2 and 3 have 8 teeth - for 1 revolution that gear 1 makes how many revolutions do gears 2 and 3 make?
To raise a house or other heavy machinery.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
32/8 = 4
The rope that passes through your hands is greater than the distance that the load is raised.

27. How can you figure out the mechanical advantage of most block and falls by glance?
When a resistance is overcome by a force acting through a measurable distance.
Same.
Count the number of parts of the rope going to and from the movable block.
With oil - grease or soap.

28. Fractional mechanical advantage
Equals the weight of the object being hoisted.
Magnify or reduce the force which you apply.
Foot- pounds
Mechanical disadvantage. Use more force than the force of the load you lift.

29. How is distance measured in work?
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle
Feet.
Third class lever.
Count the number of parts of the rope going to and from the movable block.

30. What kind of mechanical advantage does the first and second class lever provide?
Opposite.
Positive mechanical advantage.
Two surfaces move against one another.
Shafts lying at any given angle.

31. Class two lever
fulcrum- weight- effort
The force used to overcome friction is greater than the force used to do useful work.
Direction - speed or size of the force applied.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.

32. With a single fixed sheave on a block and tackle what must the force of your down pull equal?
When a resistance is overcome by a force acting through a measurable distance.
With oil - grease or soap.
Equals the weight of the object being hoisted.
Simple machine

33. What is the formula for the wheel and axle?
Opposite.
Magnify or reduce the force which you apply.
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle
In pounds.

34. What is another way to find the mechanical advantage of an inclined plane?
Less than 1.
Direction - speed or size of the force applied.
Simple machine
Length of ramp/length of height from floor to truck

35. What is the mechanical advantage of a single movable block?
Work=Force*Distance
In Horsepower.
The change of the direction of the pull.
2. Each half of the rope carries an equal amount of weight.

36. What is the ratio of any gear train?
1
To magnify the applied force.
Find the resistance weight and divide that by the effort you need to lift the weight. M.A=R/E - This rule applies to all machines.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.

37. What direction does the effort and resistance move in third class levers.
Same.
A screw and a spur gear.
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle
To speed up the motion of resistence.

38. How can you decrease friction on flat surfaces?
Work=Force*Distance
With oil - grease or soap.
L=radius of the circle where the handle turns/l=1/2 the width of the edge of the blade = R=force of resistance offered by the screw/E=effort applied by the handle
Connects shafts having a 90 degree angle.

39. What direction does the effort and resistance move in the second class levers?
Same.
In pounds.
A screw and a spur gear.
32/8 = 4

40. The worm gear is a combination of what?
A screw and a spur gear.
A modification of an inclined plane.
With oil - grease or soap.
Feet.

41. What is the mechanical advantage for a single fixed block?
Can change the direction of motion.
Two surfaces move against one another.
2(pie)/pitch
1

42. What is the first thing a gear can do?
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
With oil - grease or soap.
Can change the direction of motion.
2(pie)/pitch

43. Gears can do a job for you by changing what three things?
Direction - speed or size of the force applied.
2. Each half of the rope carries an equal amount of weight.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.
Wheel and axle.

44. What type of lever provides a fractional mechanical advantage?
With oil - grease or soap.
Third class lever.
To speed up the motion of resistence.
Foot- pounds

45. For Blocks and falls if you are getting a mechanical advantage what is the distance of your pull and the weights?
Feet.
Length of ramp/length of height from floor to truck
The rope that passes through your hands is greater than the distance that the load is raised.
32/8 = 4

46. What are first and third class levers used for?
Connects shafts having a 90 degree angle.
1
A screw and a spur gear.
To magnify the applied force.

47. How is work done?
Equals the weight of the object being hoisted.
When a resistance is overcome by a force acting through a measurable distance.
Two surfaces move against one another.
Can change the direction of motion.

48. Friction is involved when?
2. Each half of the rope carries an equal amount of weight.
Can change the direction of motion.
With oil - grease or soap.
Two surfaces move against one another.

49. What is the third thing a gear can do?
In Horsepower.
Count the number of parts of the rope going to and from the movable block.
Magnify or reduce the force which you apply.
45

50. What is the theoretical mechanical advantage of any gear train?
1
With oil - grease or soap.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.
Count the number of parts of the rope going to and from the movable block.

Test your basic knowledge |

Mechanical Systems 3

Link to This Test

Related Subjects