1. A lever consists of:
(A) Fulcrum, effort, and load
(B) Muscle, tendon, and bone
(C) Joint, ligament, and tendon
(D) Bone, cartilage, and muscle
2. The fulcrum in a lever is:
(A) The pivot point
(B) The applied force
(C) The resistance
(D) The joint capsule
3. The effort in a lever is:
(A) The force applied to move a load
(B) The resistance
(C) The pivot point
(D) The muscle origin
4. The load in a lever is:
(A) The resistance to movement
(B) The applied force
(C) The pivot point
(D) The muscle attachment
5. Which class of lever has the fulcrum between effort and load?
(A) First-class
(B) Second-class
(C) Third-class
(D) Fourth-class
6. Which class of lever has the load between fulcrum and effort?
(A) Second-class
(B) First-class
(C) Third-class
(D) Fourth-class
7. Which class of lever has the effort between fulcrum and load?
(A) Third-class
(B) First-class
(C) Second-class
(D) Fourth-class
8. The elbow joint during biceps curl is an example of:
(A) Third-class lever
(B) First-class lever
(C) Second-class lever
(D) Fourth-class lever
9. The tiptoe (plantarflexion at ankle) is an example of:
(A) Second-class lever
(B) First-class lever
(C) Third-class lever
(D) Fourth-class lever
10. The nodding of the head at atlanto-occipital joint is an example of:
(A) First-class lever
(B) Second-class lever
(C) Third-class lever
(D) Fourth-class lever
11. Which lever type is most common in the human body?
(A) Third-class lever
(B) First-class lever
(C) Second-class lever
(D) Fourth-class lever
12. In a first-class lever, if the fulcrum is closer to the load, the mechanical advantage:
(A) Increases
(B) Decreases
(C) Remains the same
(D) Becomes zero
13. In a third-class lever, the effort arm is usually:
(A) Shorter than the load arm
(B) Longer than the load arm
(C) Equal to the load arm
(D) Variable
14. Third-class levers favor:
(A) Speed and range of motion
(B) Mechanical advantage
(C) Force multiplication
(D) Load reduction
15. Second-class levers favor:
(A) Force multiplication
(B) Speed
(C) Range of motion
(D) Flexibility
16. In a biceps curl, the biceps brachii applies effort at:
(A) Radial tuberosity
(B) Humeral epicondyle
(C) Ulna
(D) Acromion
17. The load in a biceps curl is:
(A) The weight in the hand
(B) The elbow joint
(C) The humerus
(D) The shoulder
18. The fulcrum in a biceps curl is:
(A) Elbow joint
(B) Shoulder joint
(C) Wrist
(D) Forearm
19. The Achilles tendon during plantarflexion applies effort at:
(A) Calcaneus
(B) Ankle joint
(C) Metatarsals
(D) Tibia
20. The load in plantarflexion is:
(A) Body weight
(B) Foot
(C) Tibia
(D) Ankle
21. The fulcrum in plantarflexion is:
(A) Metatarsophalangeal joints
(B) Ankle joint
(C) Knee
(D) Hip
22. Mechanical advantage is calculated as:
(A) Effort arm / Load arm
(B) Load / Effort
(C) Load arm / Effort arm
(D) Fulcrum × Load
23. A lever where the effort is greater than the load has:
(A) Mechanical advantage < 1
1″ onclick=”checkAnswer(‘q23’, ‘Mechanical advantage < 1')"> (B) Mechanical advantage > 1
(C) Mechanical advantage = 1
(D) Zero advantage
24. A lever where the load is closer to fulcrum than effort has:
1″ onclick=”checkAnswer(‘q24’, ‘Mechanical advantage > 1’)”> (A) Mechanical advantage > 1
1′)”> (B) Mechanical advantage < 1
1′)”> (C) Mechanical advantage = 1
1′)”> (D) Zero advantage
25. The triceps at elbow extension is an example of:
(A) Third-class lever
(B) First-class lever
(C) Second-class lever
(D) Fourth-class lever
26. The hamstrings during knee flexion act as:
(A) Effort
(B) Fulcrum
(C) Load
(D) Pivot
27. The gastrocnemius during jumping applies effort at:
(A) Calcaneus
(B) Knee
(C) Tibia
(D) Metatarsals
28. The mechanical advantage of third-class levers is usually:
(A) Less than 1
(B) Greater than 1
(C) Equal to 1
(D) Variable
29. The mechanical advantage of second-class levers is usually:
(A) Greater than 1
(B) Less than 1
(C) Equal to 1
(D) Variable
30. In first-class levers, increasing the distance from fulcrum to effort:
(A) Increases speed and distance of load
(B) Decreases load movement
(C) Decreases speed
(D) Reduces range of motion
31. The atlanto-occipital joint lever system involves which muscles?
(A) Posterior neck muscles
(B) Biceps brachii
(C) Gastrocnemius
(D) Triceps
32. The mechanical advantage of a lever depends on:
(A) Length of effort and load arms
(B) Muscle strength only
(C) Joint type
(D) Bone density
33. The forearm in pronation-supination functions as:
(A) Third-class lever
(B) Second-class lever
(C) First-class lever
(D) Fourth-class lever
34. The force-velocity relationship in levers shows:
(A) Greater speed decreases force output
(B) Greater force increases speed
(C) Lever type changes muscle origin
(D) Load is independent of speed
35. The elbow joint during push-ups is a:
(A) Third-class lever
(B) Second-class lever
(C) First-class lever
(D) Fourth-class lever
36. The mechanical advantage < 1 implies:
(A) High speed and range, low force
(B) High force, low speed
(C) Equal speed and force
(D) No movement
37. The mechanical advantage > 1 implies:
(A) High force, low speed and range
(B) High speed, low force
(C) Equal speed and force
(D) No movement
38. The effort arm of a lever is the distance between:
(A) Effort and fulcrum
(B) Load and fulcrum
(C) Fulcrum and muscle
(D) Load and effort
39. The load arm of a lever is the distance between:
(A) Load and fulcrum
(B) Effort and fulcrum
(C) Muscle and tendon
(D) Fulcrum and effort
40. Which lever type maximizes speed at the expense of force?
(A) Third-class lever
(B) Second-class lever
(C) First-class lever
(D) Fourth-class lever
41. Which lever type maximizes force at the expense of speed?
(A) Second-class lever
(B) Third-class lever
(C) First-class lever
(D) Fourth-class lever
42. The shoulder joint during lateral raise is a:
(A) Third-class lever
(B) Second-class lever
(C) First-class lever
(D) Fourth-class lever
43. The knee during tiptoe standing is a:
(A) Second-class lever
(B) Third-class lever
(C) First-class lever
(D) Fourth-class lever
44. The mechanical advantage of first-class levers is:
(A) Variable, depends on relative arm lengths
1″ onclick=”checkAnswer(‘q44’, ‘Variable, depends on relative arm lengths’)”> (B) Always > 1
(C) Always < 1
(D) Always = 1
45. The biceps brachii is a lever system because it:
(A) Exerts effort on radius to flex elbow
(B) Pulls humerus to extend shoulder
(C) Stabilizes shoulder only
(D) Moves fingers
46. The Achilles tendon acts as a lever by:
(A) Pulling calcaneus to lift body
(B) Flexing knee
(C) Extending toes
(D) Rotating hip
47. The mechanical efficiency of a lever is:
(A) Ratio of work output to work input
(B) Load × distance
(C) Force × distance
(D) Muscle strength only
48. In levers, distance from fulcrum affects:
(A) Mechanical advantage and range of motion
(B) Muscle fiber type
(C) Bone density
(D) Joint capsule strength
49. Load closer to fulcrum favors:
(A) Force
(B) Speed
(C) Range of motion
(D) None
50. Effort closer to fulcrum favors:
(A) Speed and range of motion
(B) Force
(C) Stability
(D) None