Applied mechanics
Previous year question paper with solutions for Applied mechanics May-2017
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Question paper 1
SECTION-A
Q1. Fill in the blanks:
a. Mass is a ............... quantity.
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b. The force which one body exerts on the second body is called …………. force.
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c. The angle of friction is always …………… then 900 .
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d. The …………… effect of the force is called moment.
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e. The efficiency of a screw jack may be increased by ……………. Its pitch.
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f. C.G. is a term used for the bodies having ………….. only.
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g. Axis passing through the centroid of the plane lamina is called ……………… axis. decreases.
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h. Sliding friction is always ……………… then Rolling friction.
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i. In an ideal machine, velocity ratio = ………….
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j. Coefficient of friction is = ……………/……………..
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k. The unit of moment in SI system is …………
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l. A couple cannot be replaced by a ………….. force.
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m. A machine is said to be irreversible if its efficiency is …………… then 50%.
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n. One kilogram force is equal to ……….. N
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o. Efficiency ………………. as the load
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SECTION-B
Q2. Attempt any five questions.
a. Differentiate between center of gravity and centroid .
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b. Explain the characteristics of a force.
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c. Define triangle law of forces and lami`s theorem.
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d. Where the C.G. does lies of sphere, circular cone, and right circular cylinder?
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e. What do mean by moment center and moment arm and moment of a couple?
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f. Define friction. Give merits and demerits of friction.
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g. Establish a relation between efficiency, mechanical advantage and velocity ratio of a machine.
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SECTION-C
Q3. Attempt any three questions.
a. Find the magnitude and direction of the resultant of the following force system.
1. 20 N due north.
2. 12 N due north-west.
3. 10 N due east.
4. 8 N due 350 west of south
5. 16 N due 650 North West.
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b. An electric light fixture weighing 25N hangs from a point c, by two strings AC and BC. The string Ac is inclined at 600 to horizontal and BC at 450 to the vertical. Determine the forces in string AC and BC.
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c. What do mean by force? Explain Force system.
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d. Derive an equation for equilibrium of a body lying on a rough inclined plane when the motion is in downward direction and force is acting horizontally.
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