Q. A solid block of 2.0 kg mass slides steadily at a velocity V along a vertical wall as shown in the figure below. A thin oil film of thickness h = 0.15 mm provides lubrication between the block and the wall. The surface area of the face of the block in contact with the […]
Q. A sprinkler shown in the figure rotates about its hinge point in a horizontal plane due to water flow discharged through its two exit nozzles. The total flow rate Q through the sprinkler is 1 litre/sec and the cross-sectional area of each exit nozzle is 1 cm2. Assuming equal flow rate through both arms
Q. A slider crank mechanism is shown in the figure. At some instant, the crank angle is 45o and a force of 40 N is acting towards the left on the slider. The length of the crank is 30 mm and the connecting rod is 70 mm. Ignoring the effect of gravity, friction and inertial
Q. A machine of mass 𝑚 = 200 kg is supported on two mounts, each of stiffness 𝑘 = 10 kN/m. The machine is subjected to an external force (in N) 𝐹(𝑡) = 50 cos 5𝑡. Assuming only vertical translatory motion, the magnitude of the dynamic force (in N) transmitted from each mount to the
A machine of mass 𝑚 = 200 kg is supported on two mounts, each of stiffness 𝑘 = 10 kN/m Read More »
Q. A simply supported beam of width 100 mm, height 200 mm and length 4 m is carrying a uniformly distributed load of intensity 10 kN/m. The maximum bending stress (in MPa) in the beam is (correct to one decimal place). Ans: 29.8 – 30.1
A simply supported beam of width 100 mm, height 200 mm and length 4 m is carrying a Read More »
Q. The percentage scrap in a sheet metal blanking operation of a continuous strip of sheet metal as shown in the figure is_____________(correct to two decimal places). Ans: 53.25
Q. The maximum reduction in cross-sectional area per pass ( R ) of a cold wire drawing process is R = 1 – e-(n+1) , where n represents the strain hardening coefficient. For the case of a perfectly plastic material, R is (A) 0.865 (B) 0.826 (C) 0.777 (D) 0.632 Ans: 0.632
The maximum reduction in cross-sectional area per pass ( R ) of a cold wire drawing Read More »
Q. In a Lagrangian system, the position of a fluid particle in a flow is described as 𝑥 = 𝑥𝑜𝑒−𝑘𝑡 and 𝑦 = 𝑦𝑜𝑒𝑘𝑡 where t is the time while 𝑥𝑜, 𝑦𝑜, and k are constants. The flow is A. unsteady and one-dimensional B. steady and two-dimensional C. steady and one-dimensional D. unsteady and two-dimensional
In a Lagrangian system, the position of a fluid particle in a flow is described as Read More »
Q. A tank open at the top with a water level of 1 m, as shown in the figure, has a hole at a height of 0.5 m. A free jet leaves horizontally from the smooth hole. The distance X (in m) where the jet strikes the floor is (A) 0.5 (B) 1.0 (C) 2.0
Q. A self-aligning ball bearing has a basic dynamic load rating (C10, for 106 revolutions) of 35 kN. If the equivalent radial load on the bearing is 45 kN, the expected life (in 106 revolutions) is (A) below 0.5 (B) 0.5 to 0.8 (C) 0.8 to 1.0 (D) above 1.0 Ans: below 0.5
