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Applied Materials Technical Questions with Answers 2012
Posted on :28-03-2016
Q1. The roller-coaster car has a speed of 15 ft/s when it is at the crest of a vertical parabolic track. Compute the velocity and the normal force it exerts on the track when it reaches point B. Neglect friction and the mass of the wheels. The total weight of the car and the passengers is 350 lb.
a) vB = 114.5 ft/s, NB = 29.1 lbb) vB = 114.5 ft/s, NB = 284 lbc) vB = 114.5 ft/s, NB = 156.5 lbd) vB = 114.5 ft/s, NB = 440 lb
Q2. The book A having a weight of 1.5 lb slides on the smooth horizontal slot. If the block is drawn back so that s = 0. Each of the two springs has a stiffness of k = 150 lb/ft and an unscratched length of 0.5 ft.
a) vA = 106.2 ft/sb) vA = 120.4 ft/sc) vA = 160.5 ft/sd) vA = 107.7 ft/s
Q3. The purpose of jigs and fixtures are to
a) Increased production rateb) Increased machining accuracyc) Facilitate interchangeable manufacturingd) Enable employ less skilled operatorse) All of the above
Q4. Pick up the wrong statement? A refrigerant should have
a) Low specific heat of liquidb) High boiling pointc) High latent heat of vaporizationd) Higher critical temperaturee) Low specific volume of vapor
Q5. Nodular iron has
a) High machinabilityb) Low melting pointc) High tensile strengthd) Good fluiditye) All of the above
Q6. The property of a material which enable it to resist fracture due to high impact loads is known as
a) Elasticityb) Endurancec) Strengthd) Toughnesse) Resilience
Q7. A car having a mass of 2 Mg strikes a smooth, rigid sign post with an initial speed of 30 km/h. To stop the car, the front end horizontally deforms 0.2 m. If the car is free to roll during the collision, determine the average horizontal collision force causing the deformation.
a) Favg = 9000 kNb) Favg = 4500 kNc) Favg = 347 kNd) Favg = 694 kN
Q8. The block has a weight of 1.5 lb and slides along the smooth chute AB. It is released from rest at A, which has coordinates of A (5 ft, 0, 10 ft). Determine the speed at which it slides off at B, which has coordinates of B
(0, 8 ft, 0).
a) vB = 28.7 ft/sb) vB = 25.4 ft/sc) vB = 26.8 ft/sd) vB = 29.8 ft/s
Q9. The elevator E and its freight have a total mass of 400 kg. Hoisting is provided by the motor M and the 60-kg block C. If the motor has an efficiency of e = 0.6, determine the power that must be supplied to the motor when the elevator is hoisted upward at a constant speed of vE = m/s.
a) P = 22.2 kWb) P = 13.34 kWc) P = 26.2 kWd) P = 30.1 kW
Q10. When at A the bicyclist has a speed of vA = ft/s. If he coasts without pedaling from the top of the hill at A to the shore of B and then leaps off the shore, determine his speed at B and the distance x where he strikes the water at C. The rider and his bicycle have a total weight of 150 lb. Neglect the size of the bicycle and wind resistance.
a) vB = 35.0 ft/s, x = 41.2 ftb) vB = 35.0 ft/s, x = 36.1 ftc) vB = 40.1 ft/s, x = 46.5 ftd) vB = 40.1 ft/s, x = 52.0 ft
Q11. Spring index is
a) Ratio of coil diameter to wire diameterb) Load required to produce unit deflectionc) Its capability of storing energyd) Indication of quality of springe) Nothing
Q12. A feeler gauge is used to check
a) Radiusb) Screw pitchc) Surface roughnessd) Unsymmetrical shapee) Thickness of clearance
Q13. The firing mechanism of a pinball machine consists of a plunger P having a mass of 0.25 kg and a spring of stiffness k = 300 N/m. When s = 0, the spring is compressed 50 mm. If the arm is pulled back such that s = 100 mm and released, determine the speed of the 0.3 kg pinball B just before the plunger strikes the stop, i.e., s = 0. Assume all surfaces of contact to be smooth. The ball moves in the horizontal plane. Note that the ball slides without rolling.
a) v = 4.47 m/sb) v = 3.30 m/sc) v = 2.34 m/sd) v = 3.16 m/s
Q14. A motor hoists a 50-kg crate at constant speed to a height of h = 6 m in 3 s. If the indicated power of the motor is 4 kw, determine the motors efficiency.
a) e = 0.025 (2.5%)b) e = 0.245 (24.5%)c) e = 0.736 (73.6%)d) e = 0.05 (5.0%)
Q15. Tool life of the cutting tool is most affected by
a) Cutting speedb) Tool geometryc) Cutting feed and depthd) Micro structure of material being cute) Not using coolant and lubricant
Q16. Which one of the following methods produces gear by generating process
a) Hobbingb) Castingc) Punchingd) Millinge) Broaching
Q17. The coefficient of friction between the 2-lb block and the surface is = 0.2. The block is acted upon by a horizontal force of P. Determine the maximum deformation of the outer spring B at the instant the block comes to rest. Spring B has a stiffness of KB = 20 lb/ft and the nested spring C has a stiffness of kc = 40 lb/ft.
a) xB = 1.154 ftb) xB = 0.790 ftc) xB = 0.923 ftd) xB = 1.137 ft
Q18. Metal in machining operation is removed by
a) Tearing chipsb) Distortion of metalc) Shearing the metal across a zoned) Cutting the metal across a zonee) Pushing the metal with tool
Q19. A truck has a weight of 25,000 lb and an engine which transmits a power of 350 hp. Assuming that the wheels do not slip on the ground, determine the angle of the largest incline the truck can climb at a constant speed of v = 50 ft/s.
a) 2 = 8.86 Eb) 2 = 24.3 Ec) 2 = 8.75 Ed) 2 = 26.8 E