86101. In order to withstand resistance to wear, the best profile of gear is
86102. A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is
86103. The design of pin of a rocker arm of an I.C. engine is based on
86104. For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be
86105. A wood-ruff key is
86106. In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.
86107. In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.
86108. For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.
86109. Lewis equation in gears is used to find the
86110. In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that
86111. All stresses produced in a belt are
86112. An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
86113. The ratio of driving tensions in V-belt drives is __________ flat belt drives.
86114. A shaft is designed on the basis of rigidity and stiffness.
86115. Which of the following spring is used in mechanical wrist watch?
86116. In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
86117. Which of the following has threads at both ends?
86118. The ratio of the ultimate stress to the design stress is known as
86119. According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
86120. The cam follower extensively used in air-craft engines is
86121. The minor diameter of a screw thread is also known as outside or nominal diameter.
86122. A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
86123. The radial stress across the thickness of a thick cylinder is maximum at the inner surface and zero at the outer surface.
86124. The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.
86125. The resilience of a bolt may be increased by
86126. In worm, gears, pitch lead angle is
86127. The effective stress in wire ropes during normal working is equal to the stress due to
86128. When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a
86129. A connecting rod should be
86130. According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
86131. When two non-parallel or intersecting but coplaner shafts are connected by gears, the arrangement is known as bevel gearing.
86132. According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
86133. In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
86134. A steel containing __________ 0.8% carbon is known as hypo-eutectoid steel.
86135. When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
86136. Which one of the following loading is considered for the design of axles?
86137. The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
86138. A basic hole is one whose
86139. In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.
86140. A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as hollow saddle key.
86141. In levers, leverage is the ratio of
86142. The diameter of washer is generally taken bigger than the nut size.
86143. If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
86144. In block brakes, the ratio of shoe width to wheel diameter is taken between
86145. Oldham coupling is used to transmit power between two parallel shafts which are slightly offset.
86146. A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
86147. When a machine member is subjected to torsion, the torsional shear stress set up in the member is
86148. Pitch point of a cam is
86149. When two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft, the arrangement is known as spiral gearing.
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