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Question (11)

QN006422

Which simple machine is used in opening bottle caps?

(A) Wheel and axle
(B) Lever
(C) Pulley
(D) Wedge

Correct Answer: A

Explanation:

Bottle opener works as wheel and axle.

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Question (12)

QN006423

The mechanical advantage of a machine is:

(A) Load ÷ Effort
(B) Effort ÷ Load
(C) Work × Time
(D) Force × Distance

Correct Answer: A

Explanation:

Mechanical advantage = Load / Effort.

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Question (13)

QN006424

A machine lifts a 200 N load using 50 N effort. Mechanical advantage is:

(A) 2
(B) 3
(C) 4
(D) 5

Correct Answer: C

Explanation:

MA = 200/50 = 4

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Question (14)

QN006425

Which machine changes the direction of force only?

(A) Single fixed pulley
(B) Inclined plane
(C) Screw
(D) Wedge

Correct Answer: A

Explanation:

Fixed pulley changes direction of effort.

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Question (15)

QN006426

The wheel and axle machine works on the principle of:

(A) Rotation
(B) Reflection
(C) Refraction
(D) Expansion

Correct Answer: A

Explanation:

Wheel and axle rotates around a common axis.

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Question (16)

QN006427

Scissors are an example of:

(A) Pulley
(B) Lever
(C) Wedge
(D) Screw

Correct Answer: B

Explanation:

Scissors function as levers.

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Question (17)

QN006428

Which class of lever is a wheelbarrow?

(A) First class
(B) Second class
(C) Third class
(D) None

Correct Answer: B

Explanation:

Wheelbarrow is a second class lever.

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Question (18)

QN006429

In a second class lever, the load lies between:

(A) Effort and fulcrum
(B) Force and motion
(C) Wheel and axle
(D) Rope and pulley

Correct Answer: A

Explanation:

Load lies between fulcrum and effort.

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Question (19)

QN006430

A nutcracker is an example of:

(A) First class lever
(B) Second class lever
(C) Third class lever
(D) Pulley

Correct Answer: B

Explanation:

Nutcracker is second class lever.

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Question (20)

QN006431

Which class of lever is used in a fishing rod?

(A) First class
(B) Second class
(C) Third class
(D) Fourth class

Correct Answer: C

Explanation:

Fishing rod is a third class lever.

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Question (11)

Which simple machine is used in opening bottle caps?

Explanation:

Link:

Question (12)

The mechanical advantage of a machine is:

Explanation:

Link:

Question (13)

A machine lifts a 200 N load using 50 N effort. Mechanical advantage is:

Explanation:

Link:

Question (14)

Which machine changes the direction of force only?

Explanation:

Link:

Question (15)

The wheel and axle machine works on the principle of:

Explanation:

Link:

Question (16)

Scissors are an example of:

Explanation:

Link:

Question (17)

Which class of lever is a wheelbarrow?

Explanation:

Link:

Question (18)

In a second class lever, the load lies between:

Explanation:

Link:

Question (19)

A nutcracker is an example of:

Explanation:

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Question (20)

Which class of lever is used in a fishing rod?

Explanation:

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