February 2023 MCQ

Question 1

In the human body, most of the lever systems formed by muscles pulling on bones are of which class?

(a) 1st class
(b) 2nd class
(c) 3rd class
(d) no dominant class

Answer 1

(c) 3rd class

Question 2

A competitive diver leaves a diving board and falls toward the water with her body straight and
rotating slowly. She pulls her arms and legs into a tight tuck position. Her rotational kinetic energy:

(a) decreases.
(b) increases.
(c) stays the same.
(d) cannot be determined

Answer 2

(b) increases.

Question 3

Regarding moment of inertia of the leg with respect to the hip, which of the following leg morphologies would favour a sprinter?

(a) Leg morphology does not matter.
(b) Massive lower legs and slimmer thighs.
(c) Massive thighs and slimmer lower legs.
(d) Cannot be determined.

Answer 3

(c) Massive thighs and slimmer lower legs.

Question 4

Why does a figure skater cross his arms tightly across the chest when performing a quadruple axel (4 ½ revolutions)?

(a) To increase time in the air.
(b) To reduce angular velocity.
(c) To reduce moment of inertia.
(d) Both (b) and (c).

Answer 4

(c) To reduce moment of inertia.

Question 5

You can REDUCE a body’s stability by increasing:

(a) the base of support.
(b) the body mass.
(c) the friction between the body and the support surface.
(d) the position of the centre of gravity from the support surface.

Answer 5

(d) the position of the centre of gravity from the support surface.

Question 6

In running gait, the point of initial contact is usually located:

(a) at the anterior end of the foot.
(b) at the heel.
(c) during foot flat.
(d) mid-foot.

Answer 6

(b) at the heel.

Question 7

Causes of limb abnormalities could be due to:

(a) Diseases.
(b) Bad posture habits.
(c) Trauma.
(d) All of the above

Answer 7

(d) All of the above

Question 8

SACH foot prosthesis is an abbreviation for:

(a) Soft Ankle Cuff Heel.
(b) Soft Arch Cushion Heel.
(c) Solid Ankle Cushion Heel.
(d) Solid Arch Cuff Heel.

Answer 8

(c) Solid Ankle Cushion Heel.

Question 9

Adsorption is the process when particles:

(a) are repelled from the surface of the other phase.
(b) migrate to the other phase.
(c) soak into the bulk of the other phase.
(d) stick to the surface of the other phase.

Answer 9

(d) stick to the surface of the other phase.

Question 10

In the development process of an implant, 3D printing is typically used to:

(a) create prototype.
(b) enhance cell attachment.
(c) provide structural support for cell growth.
(d) reduce systemic toxicity.

Answer 10

(a) create prototype.