1.Shaft is generally made in cross section A.square B.rectangular C.circular D. elliptical

2.As . Forces acting on the shaft , they are made round in cross sectionA.tangential b.axial C.bending D.all

3.the shaft may be A.solid B.hollow C.both D.none

4.The shafts may be A.transmission shafts B. machine shafts C. both D. none

5..shafts are used to transmit power between source and machine A.transmission B.machine C.both D. none

6.carry machine elements like gears , pulley etcA.transmission B.machine C.both D. none

7.shaft forms an integral part of machineA.transmission B.machine C.both D. none

8..are used to transmit torqueA.transmission B.machine C.both D. none

9does not transmit torqueA.coupling B.shaft C.key D.axle

10..is subjexted to bending moment onlyA.coupling B.shaft C.key D.axle

11.Key is mechanical element generally made of A.cast iron B. alluminium C.mild steel D.copper

12.key is inserted between shaft and hub to prevent ..motion between them A. relative B.absolute C. angular D.none

13.key transmit the torque from ..A.shaft to hub B.hub to shaft C. both D.none

14..is inseted parallel to the axis of shaft A.coupling B.shaft C.key D.axle

15.keys are subjected to ..stressesA.bending B.crushing C.both D.none

16.Parallel sunk key is of A.square B.rectangular C.circular D. elliptical

17.Torque transmitting capacity of saddle key is A.high B.low C.medium D.all

18.are used for heavy duty applications A.saddle key B.round key C.tangent key D.splines

19. are difficult to fitA.saddle key B.round key C.tangent key D.splines

20.round keys are also called as A.pin key B.saddlle key C.sunk key D.kennedy key

21..are taperlessA.parallel key B.round key C.splines D.all

22.can not be engaged or disengaged as neededA.Clutch B.shaft C.coupling D.all

23.couplings are simple and inexpensiveA.rigid B.flexible C.mufff D.all

25.shock and vibration absorbing capacity of ..coupling is moreA.rigid B.flexible C.mufff D.all

26.flange coupling is type of .A.rigid B.flexible C.mufff D.all

27.the two flanges are coupled together by using A.weleded joint B.nut and bolt C.rivets D.all

28.the numner of keys in flange coupling areA.1 B.2 C.3 D.4

29.Flange couploing are used for loadsA.light B.moderete C.heavy D.all

30. 25.shock and vibration absorbing capacity of flange coupling is..A.good B.poor C.very good D.all1.A key is a piece of mild steel inserted between A. Key and hubB. Shaft and keyC. Shaft and hubD. None

2........................is a slot orrecess in a shaft and hub of the pulley to accommodate a key A. subway B. keyway C. gateway D. none.3.In Rectangular sunk key the usuaL proportions of this key areA. w = d / 4 ; t = d / 6B. w = d / 3 ; t = d / 6C. w = d / 2 ; t = d / 3D. None4.In Square sunk key its width and thickness areA. not equal B. less thanC. equal D.more than

5.The parallel sunk keys may be of .................................section uniform in width and thickness throughoutA. Circular and squareB. Traingle and rectangleC. Rectangular and circularD. Rectangular and square 6.a parallel key is a A. Tapered C. noneB. taperless D. plane

7.......... key is a rectangular sunk key with a head at one endA. Gib head B. saddle C. sunk D. tapered8.A key attached to one member of a pair and which permits relative axial movement is known as A.feather key B. saddle key C.sunk key D. none.

9.The .............. are provided half in the keyway of the shaft and half in the keyway of the hub or boss of the pulley.A.Sunk keys B.saddle key C. parallel key D.all

10.A ..................... is a taper key which fits in a keyway in the hub and the bottom of the key is shaped to fit the curved surface of the shaft.A. Hollow saddle key B. solid saddle keyC. Flat key D. parallel key

11..........is a taper key which fits in a keyway in the hub and is flat on the shaftA.parallel key B.sunk key C.none D.Flat saddle key

12.The .................. are fitted in pair at right anglesA.parallel key B. sunk key C.Tangent keys D. cross key

13.The distribution of the forces along the length of the key is .................... A.not uniform B. Regualr C. Uniform D. None

14.In designing a key, forces due to fit of the key are ...............and it is assumed that the distribution of forces along the length of key is ...............A. Neglected , uniformB. Neglected , non uniformC. Not neglected , uniformD. Not neglected , non uniform

15.the shearing strength of key,A.B.

16.torsional shear strength of the shaftA. B.

17.Shafts are usually available up to .... length due to inconvenience in transport. A.7m B.10m C.5m D. 03m

18.Shaft couplings are used in machinery for A.To reduce the transmission of shock B.To introduce protection against overloads.C.It should have no projecting partsD. ALL

19...........coupling is used to connect two shafts which are perfectly aligned.A.flexible B. Universal coupling,C. Oldham coupling. D.Rigid 20...........coupling is used to connect two shaftshaving both lateral and angular misalignmentA.Flexible B. rigid C. muff D.FLANGE21.The usual proportions of a cast iron sleeve coupling is Outer diameter of the sleeve, A. D = 3d + 13 mmB. D = d + 26 mmC. D = 2d + 13 mmD. D = 2d + 26 mm22.The usual proportions of a cast iron sleeve coupling is length of the sleeve A. L = 2.5 dB. L = 3.5 dC. L = 1.5 dD. L = d23.A ................... usually applies to a coupling having two separate cast iron flanges.A. Flange coupling C. muff couplingB. Sleeve coupling D.flexible coupling

24.In a .................... type flange couplingthe protruding bolts and nuts are protected by flanges on the two halves of the coupling, A. unprotected B. secured C.Protected D. insecured25. The usual proportions for an unprotected type cast iron flange couplingsOutside diameter of hub=A. D = 2 d B. D = 3d C. D = d D. D = d / 226.The usual proportions for an unprotected type cast iron flange couplingsLength of hub =A. L = 0.5 dB. L = 2.5 dC. L = 1.0 d D. L = 1.5 d

27. Number of bolts in flange coupling for d upto 40 mmA. 3 B. 4 C. 5 D. 628. Number of bolts in flange coupling for d upto 100 mmA. 3 B. 4 C. 5 D. 629. Number of bolts in flange coupling for d upto 180 mmA. 3 B. 4 C. 5 D. 630. The .. keys are circular in section and fit into holes drilled partly in the shaft and partly in the hub.A. round B. square C. rectangle D. none31. A good shaft coupling should have the following requirements :A. It should be easy to connect or disconnect.B. It should transmit the full power from one shaft to the other shaft without losses.C. It should hold the shafts in perfect alignment.D. ALL32. type of rigid coupling is A. Bushed pin type coupling,B. Universal couplingC. Oldham coupling.D. Flange coupling33. type of flexible coupling is A. Sleeve or muff couplingB. Universal couplingC. Flange coupling.D. NONE

34. A is a rotating machine element which is used to transmit power from one place to anotherA. shaft B. coupling C.key D.none 35.The various members are mounted on the shaft by means ofA. keys b. splines C. both D. none36 is a stationary machine element .A. shaft B. axle C. both D.none37. An axle is used for the transmission of A. bending moment onlyB. torsional moment only C. Both D. none

38. The material used for shafts should have the following properties :A. It should have high strength.B. It should have good machinability.C. It should have low notch sensitivity factor.D. all39. transmit power between the source and the machines absorbing powerA. Transmission shafts.B.Machine shaftsC. bothD. none

40. In shafts Shear stresses due to the transmission of A.forceB.bendingC. torqueD.none

41. In shafts Bending stresses (tensile or compressive) due to theA.forceB.bendingC. torqueD.none

42. A solid shaft is transmitting 1 MW at 240 r.p.m. Determine Tmean if the maximum torque transmitted exceeds the mean torque by 20%. Take the maximum allowableshear stress as 60 MPa.A. 39.784 103 N-mmB. 39 784 103 N-mmC. 19 784 103 N-mmD. 19.784 103 N-mm43. where y = A. Distance from neutral axis to the inner-most fibre.B. Distance from neutral axis to the outer-most fibre.C. Distance from any axis to the outer-most fibre.D. Distance from any axis to the inner-most fibre.

44. The standard length of the shaft isA. 5 m B. 6 mC. 7 m D.all of these

45. Two shafts will have equal strength, ifA. diameter of both the shafts is sameB. angle of twist of both the shafts is sameC. material of both the shafts is sameD. twisting moment of both the shafts is same

46. The maximum normal stress theory is used forA. brittle materials B. ductile materialsC. plastic material s D. non-ferrous materials

47. The taper on a rectangular sunk key isA.1 in 16 B.1 in 32C. 1 in 48 D. 1 in 100

48. The sleeve or muff coupling is designed as aA.thin cylinder B.thick cylinderC. solid shaft D. hollow shaft

49.For a square key made of mild steel, the shear and crushing strengths are related asA. shear strength = crushing strength B. shear strength > crushing strengthC. shear strength < crushing strength D. none of the above

50. The type of stresses developed in the key is/areA.shear stress alone B.bearing stress aloneC. both shear and bearing stresses D. shearing, bearing and bending stresses

51.When a pulley or other mating piece is required to slide along the shaft, a ................ sunk key is used.A.rectangular B. square C. parallel D. NONE

52. Torque transmitted by the shaft,A.B. C. bothD.none

53. torque transmitted by a hollow sectionA.B. C.bothD.none

54. k = A.D/d B.d/D C.D.d D. none

55. The coupling key is usually made into two parts so that the length of the key in each shaft therefore length of key is A. l = L/2B. l = 3.5d/2 C. bothD. none

56. When the shaft is subjected to a bending moment only, then the maximum stress (tensile or compressive) is given by the.A.torsion equation B. bending equationC. bothD. none

57. A transmission shaft subjected to bending loads must be designed on the basis ofA.maximum normal stress theoryB. maximum shear stress theoryC. maximum normal stress and maximum shear stress theoriesD. fatigue strength