Applied Mechanics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Applied Mechanics, a fundamental topic in the field of Civil Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Applied Mechanics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Applied Mechanics mcq questions that explore various aspects of Applied Mechanics problems. Each MCQ is crafted to challenge your understanding of Applied Mechanics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Civil Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Applied Mechanics MCQs are your pathway to success in mastering this essential Civil Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Applied Mechanics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Applied Mechanics knowledge to the test? Let's get started with our carefully curated MCQs!

Applied Mechanics MCQs | Page 10 of 26

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Q91.
Lami's theroem states that

a.

three forces acting at a point are always in equilibrium

b.

if three forces acting on a point can be represented in magnitude and direction by the sides of a triangle, the point will be in the state of equilibrium

c.

three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two

d.

three coplaner forces acting at a point will be in equilibrium if each force is inversely proportional to the sine of the angle between the other two

Discuss
Answer: (c).three coplaner forces acting at a point will be in equilibrium, if each force is proportional to the sine of the angle between the other two
Q92.
Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,

a.

dip of the cable increases

b.

length of the cable increases

c.

dip of the cable decreases

d.

none of the these.

Discuss
Answer: (c).dip of the cable decreases
Q93.
If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along

a.

the same line in the same sense

b.

the same line in opposite sense

c.

the perpendicular to both the lines

d.

none of these.

Discuss
Answer: (b).the same line in opposite sense
Q94.
For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is

a.

60%

b.

65%

c.

70%

d.

75%.

Discuss
Answer: (d).75%.
Q95.
Power can be expressed as

a.

work/energy

b.

work/time

c.

work x time

d.

work/distance.

Discuss
Answer: (b).work/time
Q96.
A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be

a.

48 kg

b.

60 kg

c.

72 kg

d.

none of these.

Discuss
Answer: (a).48 kg
Q97.
The resolved part of the resultant of two forces inclined at an angle ฮธ in a given direction is

a.

algebraic sum of the resolved parts of the forces in the direction

b.

arithmetical sum of the resolved parts of the forces in the direction

c.

difference of the forces multiplied by cosine ฮธ°

d.

sum of the forces multiplied by the sine ฮธ

Discuss
Answer: (a).algebraic sum of the resolved parts of the forces in the direction
Q98.
The following statement is one of the laws of Dynamic friction

a.

The force of friction always acts in a direction opposite to that in which a body is moving

b.

The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction

c.

For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed

d.

all the above.

Discuss
Answer: (d).all the above.
Q99.
A 50 kg boy climbs up a 8 m rope in gymnasiam in 10 sec. The average power developed by the boy is approximately

a.

400 watts

b.

500 watts

c.

4000 watts

d.

none of these.

Discuss
Answer: (a).400 watts
Q100.
According to Law of Triangle of Forces

a.

three forces acting at a point, can be rep-resented by the sides of a triangle, each side being in proportion to the force

b.

three forces acting along the sides of a triangle are always in equilibrium

c.

if three forces acting on a, point can be represented.in magnitude and direction, by the sides of a triangle taken in order, these will be in equilibrium

d.

if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order.

Discuss
Answer: (d).if the forces acting on a particle be represented in magnitude and direction by the two sides of a triangle taken in order, their resultant will be represented in magnitude and direction by the third side of the triangle, taken in opposite order.
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