Applied Mechanics Set 7

Mechanical Engineering

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This set of Applied Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Applied Mechanics Set 7

Q1 | The centre of gravity of a plane lamina will not be at its geometrical centre if it is a
Q2 | Coulomb friction is
Q3 | A framed structure is perfect if it contains members equal to
Q4 | Coulomb's law for the force between electric charges most closely resembles
Q5 | A number of forces acting at a point will be in equilibrium if
Q6 | The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount
Q7 | A rigid body is suspended vertically at a point and oscillates with a small amplitude under the action of the force of gravity. Such an arrangement is called
Q8 | A block slides down a frictionless incline making an angle ? with an elevator floor. The acceleration relative to the incline will be maximum when
Q9 | An automobile is travelling at 25 m/s. It takes 0.3 second to apply the brakes after which the deceleration is 6 m/s2. How far, in meters, does the automobile travel before it stops?
Q10 | A single purchase crab has a handle 45 cm long and a drum of 25 cm diameter. The pinion has 30 teeth and spur has 150 teeth. The efficiency of the machine is 75%. If the maximum force that can be applied is 500 newtons, the maximum load that can be lifted will be
Q11 | A body in Simple Harmonic Motion will attain maximum velocity when it passes through
Q12 | A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be
Q13 | A 5 m ladder of mass 25 kg is placed in a position where its inclination to a vertical wall is at 30?. A 100 kg man is to climb the ladder. If the coefficient of static friction is 0.25 the height along ladder at which the slipping will be induced would be
Q14 | Which one of the following is not the law of dry friction?
Q15 | A 3.2 m diameter balloon is filled with Helium. The total weight of balloon, gas and pay load is 10 kg kg. In an isothermal atmosphere having conditions identical to N.T.P. the balloon will rise to a height of about
Q16 | The statement the resultant of the external forces applied to a body (rigid or non-rigid) composed of a system of particles is equivalent to the vector summation of the effective forces acting on all particles-is known as
Q17 | The moment of a force
Q18 | In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals.
Q19 | If the angle of friction is zero a body will experience
Q20 | The excape velocity for the moon is nearly
Q21 | Williot-Mohr diagram is used to determine
Q22 | A body is pushed with a force of 10 N for 0.5 second. The impulse given to the body is
Q23 | A couple applied to a flywheel of mass 5 kg and of radius of gyration 20 cm produces an angular acceleration of 4 radians/sec2. The torque applied in dyne cm is
Q24 | The tension T2 will be
Q25 | The number of revolutions through which a pulley will rotate from rest if its angular acceleration is increased uniformly from zero to 12 rad per sec2 during 4 sec and then uniformly decreased to 0 rad per sec2 during the next 3 sec would be
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