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 Applied Mechanics

Practice Test: Question Set - 01

1. A body of mass ‘m’ moving with a constant velocity ‘v’ strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

(A) v

(B) 2v

(C) 4v

(D) 8v



2. The bellow figure shows the three coplanar forces P, Q and R acting at a point O. If these forces are in equilibrium, then
[Image 141.jpg]


(A) P/sin β = Q/sin α = R/sin ɣ

(B) P/sin α = Q/sin β = R/sin ɣ

(C) P/sin ɣ = Q/sin α = R/sin β

(D) P/sin α = Q/sin ɣ = R/sin β


3. The centre of percussion of the homogeneous rod of length ‘L’ suspended at the top will be

(A) L/2

(B) L/3

(C) 3L/4

(D) 2L/3


4. The angle of inclination of the plane at which the body begins to move down the plane, is called

(A) Angle of friction

(B) Angle of repose

(C) Angle of projection

(D) None of these



5. Pick up wrong statement about friction force for dry surfaces. Friction force is

(A) Proportional to normal load between the surfaces

(B) Dependent on the materials of contact surface

(C) Proportional to velocity of sliding

(D) Independent of the area of contact surfaces



6. The term 'Centroid' is

(A) The same as centre of gravity

(B) The point of suspension

(C) The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

(D) None of the above


7. The C.G. of a plane lamina will not be at its geometrical centre in the case of a

(A) Right angled triangle

(B) Equilateral triangle

(C) Square

(D) Circle


8. If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be
[Image 137.jpg]

(A) Same

(B) Half

(C) Double

(D) None of these

9. The moment of inertia of a thin rod of mass 'm' and length 'l', about an axis through its centre of gravity and perpendicular to its length is

(A) ml2/4

(B) ml2/ 6

(C) ml2/8

(D) ml2/12



10. Forces are called coplanar when all of them acting on body lie in

(A) One point

(B) One plane

(C) Different planes

(D) Perpendicular planes
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Applied Mechanics
Practice Test: Question Set - 01
Answer key

1. Option B
2. Option B
3. Option D
4. Option A
5.Option C
6. Option A
7. Option A
8. Option B
9. Option D
10. Option B
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Mechanical engineering set - 01

1.When a gas is heated, change takes place in

(A) Temperature

(B) Pressure

(C) Volume

(D) All of these


2. One molecule of oxygen consists of __ atoms of oxygen.

(A) 2

(B) 4

(C) 8

(D) 16


3. Which of the following variables controls the physical properties of a perfect gas?

(A) Pressure

(B) Temperature

(C) Volume

(D) All of the above




4. Work done in a free expansion process is

(A) Zero

(B) Maximum

(C) Minimum

(D) Positive


5. Which of the following laws is applicable for the behaviour of a perfect gas?

(A) Boyle's law

(B) Charles ‘law

(C) Gay Lussac’s law

(D) All of the above


6. The unit of temperature in S.I. units is

(A) Centigrade

(B) Celsius

(C) Fahrenheit

(D) Kelvin


7. A cycle consisting of _ and two isothermal processes is known as Stirling cycle.

(A) Two isentropic

(B) One constant pressure, one constant volume

(C) Two constant volumes

(D) Two constant pressures


8. The unit of length in S.I. units is

(A) Meter

(B) Centimeter

(C) Kilometer

(D) Millimeter


9. The main cause for the irreversibility is

(A) Unrestricted expansion

(B) Mechanical and fluid friction

(C) Heat transfer with a finite temperature difference

(D) All of the above



10. The unit of energy in S.I. units is

(A) watt

(B) Joule

(C) joule/s

(D) joule/m
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Mechanical Engineering set-01 key

1) Option D
2) Option A
3) Option D
4) Option A
5) Option D
6) Option D
7) Option C
8) Option A
9) Option D
10) Option B
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Made easy electrical machines
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Previous year solved with solution for SSC JE
Forwarded from $®££
5_6273591964000583895.pdf
11.4 MB
5_6273591964000583895.pdf