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. The bevel gear is used to connect what?
A modification of an inclined plane.
A few thousandths of an inch.
Shafts lying at any given angle.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.

2. What is the third thing a gear can do?
Length of ramp/length of height from floor to truck
Magnify or reduce the force which you apply.
Effort arm/Resistance arm - A/a - An expression of the ratio of the applied force and the resistance.
2. Each half of the rope carries an equal amount of weight.

3. What direction does the effort and resistance move in the second class levers?
Same.
Magnify or reduce the force which you apply.
Feet.
With oil - grease or soap.

4. What kind of machine is the inclined plane?
Simple machine
A few thousandths of an inch.
Foot- pounds
1

5. What is the power formula?
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
Opposite.
Power=Work/Time
fulcrum- weight- effort

6. What is another way to find the mechanical advantage of an inclined plane?
Power=Work/Time
Length of ramp/length of height from floor to truck
Simple machine
Wheel and axle.

7. How is distance measured in work?
32/8 = 4
Feet.
A screw and a spur gear.
Count the number of parts of the rope going to and from the movable block.

8. The miter gear faces are beveled at what angle?
Magnify or reduce the force which you apply.
45
In pounds.
your arm.

9. hat is a screw?
In Horsepower.
Door knob.
A modification of an inclined plane.
The rope that passes through your hands is greater than the distance that the load is raised.

10. How is force measured in work?
Power=Work/Time
A screw and a spur gear.
Two surfaces move against one another.
In pounds.

11. With a single fixed sheave on a block and tackle what must the force of your down pull equal?
To magnify the applied force.
45
Same.
Equals the weight of the object being hoisted.

12. What are the 4 forces?
Power=Work/Time
Work=Force*Distance
Gravity - Magnetism - Friction - Recoil
A screw and a spur gear.

13. How can you decrease friction on flat surfaces?
Magnify or reduce the force which you apply.
With oil - grease or soap.
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

14. What is the second thing a gear can do?
Less than 1.
To raise a house or other heavy machinery.
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.

15. Work is measured in units also known as?
2. Each half of the rope carries an equal amount of weight.
Same.
Foot- pounds
The rope that passes through your hands is greater than the distance that the load is raised.

16. The worm gear is a combination of what?
Power=Work/Time
Length of ramp/length of height from floor to truck
A screw and a spur gear.
To magnify the applied force.

17. What are first and third class levers used for?
Equals the weight of the object being hoisted.
Foot- pounds
your arm.
To magnify the applied force.

18. What direction does the effort and resistance move in third class levers.
Length of ramp/length of height from floor to truck
1
Same.
Can change the direction of motion.

19. For Blocks and falls if you are getting a mechanical advantage what is the distance of your pull and the weights?
Connects shafts having a 90 degree angle.
Direction - speed or size of the force applied.
A modification of an inclined plane.
The rope that passes through your hands is greater than the distance that the load is raised.

20. Fractional mechanical advantage
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.
Mechanical disadvantage. Use more force than the force of the load you lift.
45
A screw and a spur gear.

21. How do you measure power?
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
45
Gravity - Magnetism - Friction - Recoil
In Horsepower.

22. What does a micrometer measure?
Power=Work/Time
Length of ramp/length of height from floor to truck
Wheel and axle.
A few thousandths of an inch.

23. What is the first thing a gear can do?
Equals the weight of the object being hoisted.
A screw and a spur gear.
Can change the direction of motion.
Positive mechanical advantage.

24. What is the ratio of any gear train?
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
The force used to overcome friction is greater than the force used to do useful work.
Feet.
2(pie)/pitch

25. How do you find the mechanical advantage?
Work=Force*Distance
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.
fulcrum- weight- effort

26. What is the jack screw used for?
Less than 1.
To raise a house or other heavy machinery.
Same.
Opposite.

27. What is the purpose of a third class lever?
The force used to overcome friction is greater than the force used to do useful work.
Connects shafts having a 90 degree angle.
To speed up the motion of resistence.
The rope that passes through your hands is greater than the distance that the load is raised.

28. What is the lever formula?
The change of the direction of the pull.
Power=Work/Time
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
Foot- pounds

29. What type of lever provides a fractional mechanical advantage?
In pounds.
Third class lever.
In Horsepower.
The force used to overcome friction is greater than the force used to do useful work.

30. What is the theoretical mechanical advantage of any gear train?
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.
2. Each half of the rope carries an equal amount of weight.
Magnify or reduce the force which you apply.
Direction - speed or size of the force applied.

31. With a single fixed sheave what is the only mechanical advantage?
With oil - grease or soap.
The change of the direction of the pull.
Direction - speed or size of the force applied.
Same.

32. How is work done?
Increase or decrease the the speed of the applied motion.
To raise a house or other heavy machinery.
The change of the direction of the pull.
When a resistance is overcome by a force acting through a measurable distance.

33. 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?
Magnify or reduce the force which you apply.
32/8 = 4
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
fulcrum- weight- effort

34. What is the mechanical advantage for a single fixed block?
your arm.
Opposite.
1
When a resistance is overcome by a force acting through a measurable distance.

35. What kind of mechanical advantage does the first and second class lever provide?
Equals the weight of the object being hoisted.
Two surfaces move against one another.
Positive mechanical advantage.
Gravity - Magnetism - Friction - Recoil

36. What is another example of a wheel and axle?
Length of ramp/length of height from floor to truck
Door knob.
Simple machine
Effort arm/Resistance arm - A/a - An expression of the ratio of the applied force and the resistance.

37. What is one type of second class lever?
A few thousandths of an inch.
Wheel and axle.
Less than 1.
Door knob.

38. What direction does the effort and resistance move in first class levers?
45
Less than 1.
Can change the direction of motion.
Opposite.

39. An egg beater has a mechanical advantage of what?
The force used to overcome friction is greater than the force used to do useful work.
Less than 1.
In pounds.
Two surfaces move against one another.

40. Friction is involved when?
A modification of an inclined plane.
Two surfaces move against one another.
Direction - speed or size of the force applied.
The force used to overcome friction is greater than the force used to do useful work.

41. What is the work formula?
The change of the direction of the pull.
Work=Force*Distance
your arm.
Length of ramp/length of height from floor to truck

42. Formula for fractional mechanical disadvantage.
Effort arm/Resistance arm - A/a - An expression of the ratio of the applied force and the resistance.
The rope that passes through your hands is greater than the distance that the load is raised.
When a resistance is overcome by a force acting through a measurable distance.
Product of the number of teeth on the driven gears/ divided by the product of the number of teeth on the driver gears.

43. Class two lever
Two surfaces move against one another.
Product of the number of teeth on each of the driver gears/ divided by the product of number of teeth of the driven gear.
fulcrum- weight- effort
Power=Work/Time

44. Gears can do a job for you by changing what three things?
Direction - speed or size of the force applied.
Effort arm/Resistance arm - A/a - An expression of the ratio of the applied force and the resistance.
The force used to overcome friction is greater than the force used to do useful work.
Feet.

45. What is the formula for the wheel and axle?
1
fulcrum- weight- effort
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
Gravity - Magnetism - Friction - Recoil

46. A miter gear connects what?
Work=Force*Distance
Connects shafts having a 90 degree angle.
Mechanical disadvantage. Use more force than the force of the load you lift.
1

47. What is the mechanical advantage of a single movable block?
L/l=R/E Length of effort arm divided by length of resistance arm divided by weight of resistance divided by Effort.
Power=Work/Time
A few thousandths of an inch.
2. Each half of the rope carries an equal amount of weight.

48. What is the formula for the mechanical advantage of a screw?
A modification of an inclined plane.
2(pie)/pitch
The change of the direction of the pull.
32/8 = 4

49. 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.
2(pie)/pitch
To magnify the applied force.
Count the number of parts of the rope going to and from the movable block.

50. The threads of a screw are cut so?
Wheel and axle.
When a resistance is overcome by a force acting through a measurable distance.
The force used to overcome friction is greater than the force used to do useful work.
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.