### TSPSC- AE & AEE Mechanical Engineering Bit Bank - 1

 1. Instantaneous centre of a body rolling without sliding on a stationary curved surface lies 1) At a point of contact 2) On the common normal at the point of contact 3) On the common tangent at the point of contact 4) At the center of curvature of the stationary surface. View Answer Answer : 1 2. In terms of Poisson's ratio (µ), the ratio of Young's Modulus (E) to Shear Modulus (G) of elastic materials is 1) 2 (1 + µ) 2) 2 (1 - µ) 3) 1/2 (1 + µ) 4) 1/2 (1 - µ) View Answer Answer : 1 3. A block of steel is loaded by a tangential force on its top surface while the bottom surface is held rigidly. The deformation of the block is due to 1) Shear only 2) Bending only 3) Shear and bending 4) Torsion View Answer Answer : 3 4. The total extension of the bar loaded as shown in the figure is A = Area of cross-section E = Modulus of Elasticity 1) 10 × 30/AE 2) 26 × 10/AE 3) 9 × 30/AE 4) 30 × 22/AE View Answer Answer : 2 5. The maximum bending moment in a simply supported beam of length L loaded by a concentrated load 'W' at the midpoint is given by 1) WL 2) WL/2 3) WL/4 4) WL/8 View Answer Answer : 3 6. The mechanism used in a shaping machine is 1) A closed 4-bar chain having 4 revolute pair 2) A closed 6-bar chain having 6 revolute pair 3) A closed 4-bar chain having 2 revolute and 2 sliding pairs 4) An invasion of the single slider-crank chain View Answer Answer : 4 7. The speed of an engine varies from 210 rad/s to 190 rad/s. During cycle the change in the kinetic energy is found to be 400Nm. The inertia of the fly wheel in Kgm2 is 1) 0.10 2) 0.20 3) 0.30 4) 0.40 View Answer Answer : 1 8. The minimum number of teeth on the pinion to operate without interference in standard full height involute teeth gear mechanism with 200 pressure angle is 1) 14 2) 12 3) 18 4) 32 View Answer Answer : 3 9. Axial opeartion claw clutches having self-locking tooth profile 1) Can be disengaged at any speed 2) Can be disengaged only when unloaded 3) Can be engaged only when unloaded 4) Can work only with load. View Answer Answer : 3 10. The total number of instantaneous centers for a mechanism consisting of 'n' links is 1) n/2 2) n 3) (n-1)/2 4) n (n-1)/2 View Answer Answer : 4 11. Sensitiveness of a govenor is defined as 1) Range of speed/ Mean speed 2) Mean speed/ Range of speed 3) Mean speed × Range of speed 4) None View Answer Answer : 2 12. In a fillet welded joint, the weakest area of the weld is 1) Toe 2) Root 3) Throat 4) Face View Answer Answer : 3 13. Which of the following is not a friction clutch? 1) Disc or plate clutch 2) Cone clutch 3) Centrifugal clutch 4) Jaw clutch View Answer Answer : 4 14. The dimension of surface tension is 1) N/m2 2) J/m 3) J/M2 4) W/m View Answer Answer : 3 15. Kaplan turbine is 1) A high head mixed flow turbine. 2) A low head axial flow turbine. 3) An outward flow reaction turbine. 4) An impulse inward flow turbine. View Answer Answer : 2 16. What is the unit of dynamic viscosity of a fluid termed 'poise' equivalent to 1) dyne/cm2 2) gm - s/cm2 3) dyne - s/cm2 4) gm-cm/s View Answer Answer : 3 17. The pressure pascal corresponding to 3 cm column of mercury is 1) 7988.6 2) 3994.3 3) 2662.8 4) 1331.4 View Answer Answer : 2 18. An incompressible fluid flows radially outward from a line source in a steady manner. How does velocity in any radial direction vary? 1) r 2) r2 3) 1/r2 4) 1/r View Answer Answer : 4 19. For a given discharge in a channel at critical depth 1) The specific energy is minimum 2) The specific energy is maximum 3) The total energy is minimum 4) The total energy is maximum View Answer Answer : 1 20. The drag force exerted by a fluid on a body immersed in the fluid is due to 1) Pressure and viscous forces 2) Pressure and gravity forces 3) Pressure and surface tension forces 4) Viscous and gravity forces View Answer Answer : 1 21. For a given heat flow and for the same thickness, the temperature drop across the material will be maximum for 1) Copper 2) Steel 3) Glass wool 4) Refractory brick View Answer Answer : 3 22. For an opaque surface, the absorptivity (a), transmissivity (t) and reflectivity (r) are related by the equation 1) a + ? = t 2) a + ? + t = 0 3) a + ? = 1 4) a + ? = 0 View Answer Answer : 3 23. Heat pipe is widely used now a days because 1) It acts as an insulator 2) It acts as conductor and insulator 3) It acts as super conductor 4) It acts as fin View Answer Answer : 3 24. This substance has the minimum value of thermal conductivity 1) Air 2) Water 3) Plastic 4) Rubber View Answer Answer : 1 25. In case of liquids, what is the binary diffusion coefficient proportional to 1) Pressure only 2) Temperature only 3) Volume only 4) All the above View Answer Answer : 4 26. If a closed system is undergoing an irreversible process, the entrophy of the system 1) Must increase 2) Always remains constant 3) Volume only 4) Can increase, decrease or constant View Answer Answer : 4 27. Maximum theoretical work obtainable when a system interacts to equilibrium with a reference environment is called 1) Entropy 2) Enthalpy 3) Energy 4) Rothalpy View Answer Answer : 3 28. Which one of the following thermodynamic process approximates the steaming of food in a pressure cooker 1) Isoenthalpic 2) Isobaric 3) Isochoric 4) Isothermal View Answer Answer : 3 29. Change in internal energy in reversible process occuring in a closed system is equal to the heat transferred if the process occurs at constant 1) Pressure 2) Volume 3) Tempetature 4) Enthalpy View Answer Answer : 2 30. At critical point the enthalpy of vapourisation is 1) Dependent on temperature only 2) Maximum 3) Minimum 4) Zero View Answer Answer : 4 31. Global warming is caused by 1) Ozone 2) Carbondioxide 3) Nitrogen monoxide 4) Carbon View Answer Answer : 2 32. An industrial heat pump operates between the temperature of 270C and -130C. The roles of heat addition and heat rejection are 750W and 1000W respectively. The cop for the heat pump is 1) 7.5 2) 6.5 3) 4.0 4) 3.0 View Answer Answer : 3 33. A heat pump operating on carnot cycle pumps heat from a reservoir at 300k to a reservoir at 600k. The coefficient of performance is 1) 1.5 2) 0.5 3) 2 4) 1 View Answer Answer : 3 34. The refrigerant used for absorption refrigerator working heat from solar collectors is mixture of water and 1) Carbondioxide 2) Sulphurdioxide 3) Lithium bromide 4) Freon 12 View Answer Answer : 3 35. Which type of value is generally used in reciprocating refrigerant compressors 1) Mushroom value 2) Puppet value 3) Plate value 4) throttle value View Answer Answer : 3 36. The most widely used reinforcement in modern day FRP tennis racket is 1) Glass 2) Carbon 3) Aluminium 4) Magnesium View Answer Answer : 2 37. For wire drawing operation, the work material should essentially be 1) Ductile 2) Tough 3) Hard 4) Malleable View Answer Answer : 1 38. Small amount of carbonaceous material sprinkled on the inner surface of mould cavity is called 1) Backing sand 2) Facing sand 3) Green sand 4) Dry sand View Answer Answer : 2 39. Which one of the following lubricants is most suitable for drawing mild steel wires? 1) Sodium stearate 2) Water 3) Lime water 4) Kerosene View Answer Answer : 3 40. The proportion of acetylene and oxygen used in gas welding is 1) 2:1 2) 1:1 3) 1:2 4) 3:4 View Answer Answer : 2 41. The symbol used for transport in work study 1) 2) T 3) 4) View Answer Answer : 1 42. The jobs arrive at a facility for service in a random manner, the probability distribution of number of arrivals of jobs in a fixed time interval is 1) Normal 2) Poisson 3) Erlang 4) Beta View Answer Answer : 2 43. If a material expands freely due to heating it will develop 1) Thermal stress 2) Tensile stress 3) Compressive stress 4) No stress View Answer Answer : 4 44. A structural member subjected to an axial compressive force is called 1) Beam 2) Strut 3) Frame 4) No stress View Answer Answer : 2 45. A hollow shaft of the same cross section area and material as that of a solid shaft transmits 1) Same torque 2) Lesser torque 3) More torque 4) Can’t say View Answer Answer : 1 46. In a hydraulic coupling, what is the ratio of speed of the turbine runner to that of the pump impeller to maintain circulatory motion of oil? 1) < 1 2) = 1 3) > 1 4) Can be any value View Answer Answer : 1 47. The ratio of power outlet of the pump to the power input to the pump is known as 1) Mechanical Efficiency 2) Static Efficiency 3) Overall Efficiency 4) Manometric Efficiency View Answer Answer : 3 48. What does Euler’s equation of turbo machines relate to 1) Discharge and power 2) Discharge and velocity 3) Head and power 4) Head and velocity View Answer Answer : 1 49. Kinematic similarity between model and prototype is the similarity of 1) Shape 2) Discharge 3) Stream 4) Forces View Answer Answer : 2 50. A velocity potential function exists only for 1) Steady flow 2) Uniform flow 3) Irrotational flow 4) Compressible flow View Answer Answer : 3 Published on 9/18/2015 3:20:00 PM  