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You Are On Multi Choice Question Bank SET 1457

72851. 18/8 steel contains





72852. The module in the reciprocal of diametral pitch.



72853. The velocity factor for carefully cut gears operating at velocities upto __________ is equal to 4.5/4.5 + v.





72854. A localised compressive stress at the area of contact between two members is known as





72855. The metal suitable for bearings subjected to heavy loads is





72856. The V-belts are particularly suitable for __________ drives.



72857. For hardening alloy steels and high speed steels, they are heated to





72858. An universal coupling is used to connect two shafts





72859. Euler's formula for a mild steel column is not valid if the slenderness ratio is





72860. The standard length of the shaft is





72861. 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





72862. When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will





72863. A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as





72864. When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as





72865. A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called





72866. In case of pressure vessels having closed ends, the fluid pressure induces





72867. A machine part subjected to __________ is called a strut.





72868. The yield point in static loading is __________ as compared to fatigue loading.




72869. When two helical springs of equal lengths are arranged to form a cluster spring, then





72870. For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be





72871. The stress in the threaded part of the bolt will be __________ as compared to the shank.




72872. A shaft is a rotating machine element.



72873. The dedendum circle diameter is equal to (where φ = Pressure angle)





72874. Which one of the following is a positive drive?





72875. Who is the author of Common Sense?





72876. The period during which the cam follower remains at rest, when cam moves, is known as





72877. The flank of the tooth is the





72878. The included angle for the British Association thread is





72879. The contact ratio is the ratio of





72880. The passive form of 'He is writing a new book' :?





72881. The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that





72882. In a marine flange coupling, the thickness of flange is taken as





72883. The wire ropes make contact at





72884. A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm2. If the permissible tensile stress in the metal is 20 N/mm2, then the thickness of the metal required for making the pipe will be





72885. A tangent key is provided in pairs at right angles and each key is to withstand torsion in one direction only.



72886. When the speed of belt increases,





72887. 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.



72888. An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the





72889. The major diameter of a screw thread is also known as core or root diameter.



72890. The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)





72891. The property of a material which enables it to be drawn into wires with the application of a tensile force, is called





72892. The helix angle for single helical gears ranges from





72893. In order to withstand resistance to wear, the best profile of gear is





72894. 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





72895. The design of pin of a rocker arm of an I.C. engine is based on





72896. For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be





72897. A wood-ruff key is





72898. In a V-belt drive, the belt makes contact at the bottom of the groove of the pulley.



72899. In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.



72900. For crank shaft bearings, the ratio of the length of the journal to its diameter is less than unity.



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