1) The strap end of a connecting rod of steam engine is joined by_________________? a. gib of cotter joint b. sleeve and cotter joint c. spigot socket cotter joint d. knuckle joint e. universal coupling
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2) The shear plane in case of bolts should_________________? a. be across threaded portion of shank b. be parallel to axis of bolt c. be normal to threaded portion of shank d. never be across the threaded portion e. none of the above
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3) When a nut is tightened by plaping a washer below it, the bolt will be subjected to following type of loads___________________? a. compression b. tension c. shear d. combined loads e. all of the above
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4) The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for_________________? a. reducing stress concentration b. ease of manufacture c. safety d. fullering and caulking e. all of the above
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5) Which of the following pipe joints would be suitable for pipes carrying steam_____________? a. flanged b. threaded c. bell and spigot d. expansion e. compression
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6) The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is_________________? a. larger b. smaller c. equal d. larger/smaller depending on diameter of spring coil e. unpredictable
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7) Spring stiffness is__________________? a. ratio of coil diameter to wire diameter b. load required to produce unit deflection c. its capability of storing energy d. its ability to absorb shocks e. none of the above
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8) When a close coiled helical spring is compressed, its wire is subjected to________________? a. tension b. shear c. compression d. all of the above e. none of the above
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9) Belt slip may occur due to________________? a. heavy load b. loose belt c. driving pulley too small d. all of the above e. none of the above
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10) If two springs are in parallel then their overall stiffness will be_______________? a. half b. same c. double d. unpredictable e. none of the above
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11) Antifriction bearings are__________________? a. sleeve bearings b. hydrodynamic bearings c. thin lubricated bearings d. ball and roller bearings e. none of the above
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12) The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is___________________? a. 0.01 micron b. 0.1 micron c. 1 micron d. 10 microns e. 25 microns
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13) Oil in journal bearing should be applied at the point where load is________________? a. nil or lightest b. maximum c. average d. any one of the above e. unpredictable
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14) In oilness bearings________________? a. the oil film pressure is generated only by the rotation of the journal b. the oil film is maintained by supplying oil under pressure c. do not require external supply of lubricant d. grease required to be applied after some intervals e. none of the above
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15) Three different weights fall from a certain height under vacuum. They will take______________? a. same time to reach earth b. times proportional to weight to reach earth c. times inversely proportional to weight to reach earth d. unpredictable e. none of the above
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16) In standard taper roller bearings, the angle of taper of outer raceway is___________________? a. 5° b. 8° c. 15° d. 25° e. 40°
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17) Whether any core is required in wire ropes________________? a. yes b. no c. sometimes d. rarely e. very often
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18) Basic shaft is one__________________? a. whose upper deviation is zero b. whose lower deviation is zero c. whose lower as well as upper deviations are zero d. does not exist e. none of the above
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19) In composite or reverse laid ropes___________________? a. direction of twist of wires in strands is opposite to the direction of twist of strands b. direction of twist of wires and strands are same c. wires in two adjacent strands are twisted in opposite direction d. wires are not twisted e. none of the above
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20) I.S. specifies following total number of grades of tolerances__________________? a. 18 b. 16 c. 20 d. 22 e. 14
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