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# Applied Mechanics Online Exam Quiz

Important questions about Applied Mechanics. Applied Mechanics MCQ questions with answers. Applied Mechanics exam questions and answers for students and interviews.

### 1. To avoid bending action at the base of a pier,

Options

A : suspension and anchor cables are kept at the same level

B : suspension and anchor cables are fixed to pier top

C : suspension cable and anchor cables are attached to a saddle mounted on rollers on top of the pier

D : none the these.

### 3. The following factor affects the orbit of a satellite up to an altitude of 720 km from the earth's surface

Options

A : uneven distribution of the gravitational field

B : gravity of the sun and the moon

C : aerodynamic forces

D : none of these.

### 4. 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

Options

A : 48 kg

B : 60 kg

C : 72 kg

D : none of these.

### 5. Lami's theroem states that

Options

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

### 6. Which one of the following laws is not applicable to a simple pendulum?.

Options

A : The time period does not depend on its magnitude

B : The time period is proportional to its length l

C : The time period is proportional to l where l is length

D : The time period is inversely proportional to g where g is the acceleration due to gravity.

### 8. If two forces acting at a point are in equilibrium, they must be equal in magnitude and their line of action must be along

Options

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.

### 9. The following is not a law of static friction :

Options

A : The force of friction always acts in a direction opposite to that in which the body tends to move

B : The force of friction is dependent upon the area of contact

C : The force of friction depends upon the roughness of the surface

D : The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces.

### 10. A Seconds pendulum executes

Options

A : 0.5 beat per second

B : 1.0 beat per second

C : 2.0 beats per second

D : 2.5 beats per second

Options

A : 2000 m

B : 2100 m

C : 2200 m

D : 2300 m

Options

A : 0.25

B : 0.50

C : 0.75

D : 1.0

### 3. The apparent weight of a man in a moving lift is less than his real weight when it is going down with

Options

A : uniform speed

B : an acceleration

C : linear momentum

D : retardation.

### 5. A number of forces acting simultaneously on a particle of a body

Options

A : may not be replaced by a single force

B : may be replaced by a single force

C : may be replaced by a single force through C.G. of the body

D : may be replaced by a couple

### 6. P is the force acting on a body whose mass is m and acceleration is f . The equation P - mf = 0, is known as

Options

A : equation of dynamics

B : equation of dynamic equilibrium

C : equation of statics

D : none of these.

### 7. The necessary condition of equilibrium of a body, is :

Options

A : algebraic sum of horizontal components of all the forces must be zero

B : algebraic sum of vertical components of all the forces must be zero

C : algebraic sum of the moments of the forces about a point must be zero

D : all (a), (b) and (c).

### 8. Principle of Transmissibility of Forces states that, when a force acts upon a body, its effect is

Options

A : maximum if it acts at the centre of gravity of the body

B : different at different points on its line of

C : same at every point on its line of action

D : minimum if it acts at the C.G. of the body

Options

A : 10 m/sec

B : 15 m/sec

C : 20 m/sec

D : 25 m/sec.

Options

A : 9.3 m/sec

B : 8.3 m/sec

C : 7.3 m/sec

D : 6.3 m/sec.

### 3. Pick up the incorrect statement from the following :

Options

A : The C.G. of a circle is at its centre

B : The C.G. of a triangle is at the intersecton of its medians

C : The C.G. of a rectangle is at the intersection of its diagonals

D : The C.G. of a semicircle is at a distance of r /2 from the centre

Options

A : 437.5 cm 4

B : 337.5 cm 4

C : 237.5 cm 4

D : 137.5 cm 4

Options

A : 50

B : 55

C : 60

D : 65