The maximum efficiency of a square threaded screw is
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + cosφ)/ (1 - sinφ)
- In a gear, having Involute teeth, the normal to the Involute is a tangent to the
- Form coefficient of spring is
- For hardening alloy steels and high speed steels, they are heated to
- If threads on a bolt are left hand, threads on nut will be
- The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given…
- The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
- The stress induced in the belt is,
- When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and…
- The yield point in static loading is __________ as compared to fatigue loading.
- A hollow saddle key is
- In the levers of first type, the mechanical advantage is __________ one.
- If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed…
- Fabric belts are used in industrial applications because
- According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness…
- In levers, leverage is the ratio of
- The groove angle of pulleys for V-belt is
- In static loading, stress concentration is more serious in
- A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder…
- For circumferential joint in boilers, the type of joint used is
- The metal suitable for bearings subjected to heavy loads is
- The ball bearings are provided with a cage
- Which of the following material has the maximum ductility?
- In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole…
- A key way lowers
- In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set…
- The material commonly used for crane hooks is
- A hot short metal is
- In V-belt drive, belt touches
- In nitrated parts, the origins of the fatigue cracks will occur at
- When two nonintersecting and non-coplanar shafts are connected by gears, the arrangement is known as