Friction angle is less than helix angle

Friction angle is more than helix angle

Friction angle is equal to helix angle

Efficiency of screw is 100%

**Factor of safety for fatigue loading is the ratio of****According to Indian standard specifications, 100 H6/g5 means that****A bench vice has following type of threads****In most machine members, the damping capacity of the material should be****When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and…****If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making…****The shock absorbing capacity of a bolt can be increased by****The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G =…****A localised compressive stress at the area of contact between two members is known as****The yield point in static loading is __________ as compared to fatigue loading.****Which of the following statement is correct?****The application of third type levers is found in****For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be****In a transverse fillet welded joint, the size of weld is __________ the throat of weld.****The cam follower extensively used in aircraft engines is****A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved…****The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover…****In block brakes, the ratio of shoe width to wheel diameter is taken between****In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole…****The maximum normal stress theory is used for****In a partial journal bearing, the angle of contact of the bearing with the journal is****The maximum efficiency of a square threaded screw is****A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are…****The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal…****Rankine Gordon formula for buckling is valid for****An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock…****A bolt of uniform strength can be developed by****The angle of twist of shaft is****The spring mostly used in gramophones is****When the belt is transmitting maximum power,**