A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Machine Design }



85. A tube has the following advantage over pipe
A.Lighter and easier to handle
B.Greater shock absorption
C.Smoother inside walls
D.All of the above

86. 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

87. A backing ring is used inside the pipe joint when making a
A.Butt weld
B.Fillet weld
C.Sleeve weld
D.Socket weld

88. 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

89. Castle nut is a locking device in which
A.One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B.A slot is cut partly is middle of nut and then slot reduced by tightening a screw
C.A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D.Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

90. When a nut is tightened by placing a washer below it the Jolt will be subjected to following type of toads
A.Compression
B.Tension
C.Shear
D.Combined loads

91. Gear box is used
A.To produce torque
B.For speed reduction
C.To obtain variable speeds
D.To increase efficiency of system

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