Related Questions
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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
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4
Applications in which stresses are encountered in one direction only uses following type of threads
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The gears are termed as medium velocity gears, if their peripheral velocity is
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The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)
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If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio.
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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
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4
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set in order to
C. Ensure uniform loading
D. Ensure proper alignment
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The property of a bearing material which has the ability to accomodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
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In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
C. One end fixed and the other end hinged
D. One end fixed and the other end free
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An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called
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A screw is said to be over hauling screw, if its efficiency is
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Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
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The shock resistance of steel is increased by adding
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In worm, gears, pitch lead angle is
A. Half the angle between two inclined faces in axial plane
B. The angle between the tangent to the pitch helix and the plane of rotation
C. The angle between the tangent to the pitch helix and an element of the cylinder
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A tap bolt
A. Has a head on one end and a nut fitted to the other
B. Has head at one end and other end fits into a tapped hole in the other part to be joined
C. Has both the ends threaded
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The pitch of threads on a Jock nut in comparison to pitch of nut is
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In a butt welded joint, the size of weld is __________ the throat of weld.
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Which process will increase the fatigue duration of parts?
A. Finishing and polishing
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In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be
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4
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
A. Have contact at the bottom most of the bearing
B. Move towards right of the bearing making no metal to metal contact
C. Move towards right of the bearing making the metal to metal contact
D. Move towards left of the bearing making metal to metal contact
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The objective of caulking in a riveted joint is to make the joint
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The angle of twist of shaft is
A. Directly proportional to (shaft diameter)²
B. Inversely proportional to (shaft diameter)²
C. Directly proportional to (shaft diameter)⁴
D. Inversely proportional to (shaft diameter)⁴
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A double fillet welded joint with parallel fillet weld of length l and leg s is subjected to a tensile force P. Assuming uniform stress distribution, the shear stress in the weld is given by
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Aircraft body is usually fabricated by
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A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
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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
C. Sum of the initial tension and external load applied
D. Initial tension or external load, whichever is greater
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4
In a horizontal flat belt drive, it is customary to use
A. Bottom side of belt as slack side
B. Top side of belt as slack side
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When two nonintersecting and non-coplanar shafts are connected by gears, the arrangement is known as
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If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
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A column of length l is fixed at both ends. The equivalent length of the column is