86351. 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
86352. The smallest diameter of an external or internal screw thread is known as
86353. The process which improves the machinability of steels, but lowers the hardness and tensile strength is
86354. A screw is said to be a self locking screw, if its efficiency is
86355. An aluminium member is designed on the basis of
86356. A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress.
86357. The cold working of metals is carried out __________ the recrystallisation temperature.
86358. The groove angle of the pulley for rope drive is usually
86359. The ratio of pitch circle diameter in millimetres to the number of teeth, is called
86360. According to Indian standard specifications, 100 H6/g5 means that
86361. Rankine Gordon formula for buckling is valid for
86362. The angle of twist of shaft is
86363. A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be
86364. The coefficient of friction between the belt and pulley depends upon the
86365. The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.
86366. The pitch diameter is the __________ diameter of an external or internal screw thread.
86367. When a hole of diameter 'd' is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)
86368. When percentage of carbon in steel is increased, the ductility of steel decreases.
86369. The shock absorbing capacity of a bolt may be increased by
86370. A lap joint is always in single shear.
86371. If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
86372. The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
86373. The taper on cotter and slot is made on both the sides.
86374. Teflon is used for bearings because of
86375. In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)
86376. The acme threads are usually found on
86377. The radial distance from the __________ to the clearance circle is called working depth.
86378. The efficiency of a square threaded screw is maximum if the helix angle is equal to (where φ = Angle of friction)
86379. In designing thick cylinders, the equation used is
86380. Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
86381. A parallel sunk key, made of steel, is equally strong in shearing and crushing.
86382. In designing a key, it is assumed that the distribution of forces along the length of key
86383. In a belt drive, the velocity ratio is the inverse ratio of the diameters of driving and driven pulleys.
86384. In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
86385. The bearing characteristic number in a hydrodynamic bearing depends upon
86386. A spring is used to
86387. When the top of a tooth undercuts the root on the mating gear, it is known as interference.
86388. If the helix angle of a helical gear is increased, the load carrying capacity of the tooth increases.
86389. The expansion joint is mostly used for pipes which carry steam at __________ pressures.
86390. A compound belt drive is used when
86391. A tapered key which fits in a key way in the hub and is flat on the shaft, is known as
86392. The included angle for the V-belt is usually
86393. In static loading, stress concentration is more serious in
86394. The bending stress in a curved beam is
86395. The piston pin bearings in heavy duty diesel engines are
86396. Cast iron pipes are mainly used
86397. In a multiple V-belt drive, if one of the belts break, then
86398. The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
86399. The parallel fillet welded joints are designed for compressive strength.
86400. A column of length l is fixed at both ends. The equivalent length of the column is
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