In a marine flange coupling, the thickness of flange is taken as
The flank of the tooth is the
18/8 steel contains
The module in the reciprocal of diametral pitch.
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be __________ the bearing modulus.
The rocker arms in internal combustion engines are of first type levers.
The effective stress in wire ropes during normal working is equal to the stress due to
In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
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
According to law of gearing, the common normal at the point of contact between a pair of teeth must always pass through the pitch point.
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
In case of pressure vessels having closed ends, the fluid pressure induces
Which of the following statement is correct ?
The V-belts are particularly suitable for __________ drives.
When plates are fastened by a rivet, the holes in the plates should be made by punching and reaming.
The stress in the threaded part of the bolt will be __________ as compared to the shank.
The standard length of the shaft is
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)
The wire ropes make contact at
The included angle for the British Association thread is
The velocity factor for carefully cut gears operating at velocities upto __________ is equal to 4.5/4.5 + v.
When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a
For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.
The radial stress across the thickness of a thick cylinder is maximum at the inner surface and zero at the outer surface.
The design of pin of a rocker arm of an I.C. engine is based on
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the
Which one of the following loading is considered for the design of axles?
Which of the following has threads at both ends?
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
A machine part subjected to __________ is called a strut.
Two shafts of the same length and material are joined in series. If the ratio of their diameters isthen the ratio of their angles of twist will be
For hardening alloy steels and high speed steels, they are heated to
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
A shaft is a rotating machine element.
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
The diameter of washer is generally taken bigger than the nut size.
A connecting rod should be
Lewis equation in gears is used to find the
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that
Which of the following formula is used in designing a connecting rod ?
The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.
Pitch point of a cam is
For a shaft diameter ofmm, the number of bolts in a flange coupling should be
The sleeve or muff coupling is designed as a
The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
The ratio of the ultimate stress to the design stress is known as
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