Home

In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)

A. P = W tan(α - φ)

B. P = W tan(α + φ)

C. P = W tan(φ - α)

D. P = W cos(α + φ)

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. The Ackermann steering mechanism is preferred to the Davis type in automobiles because
  2. Typewriter constitutes
  3. Which of the following property of the instantaneous centre is correct?
  4. In automobiles the power is transmitted from gear box to differential through
  5. The pair is known as a higher pair, when the relative motion between the elements of a pair is
  6. It is required to connect two parallel shafts, the distance between whose axes is small and variable.…
  7. The acceleration of a particle moving with simple harmonic motion, at any instant is given by
  8. The motion between a pair which takes place in __________ is known as incompletely constrained motion.
  9. When a ship travels in a sea, which of the effect is more dangerous
  10. The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
  11. The coriolis component of acceleration depends upon
  12. Which of the following governor is used to drive a gramophone?
  13. Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is
  14. If the pressure angle is __________, a reciprocating follower will jam in its bearings.
  15. The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is
  16. Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
  17. A mechanism consisting of four links is called a __________ mechanism.
  18. In order to balance the reciprocating masses,
  19. For high speed engines, the cam follower should move with
  20. Consider the following mechanisms:1. Oscillating cylinder engine mechanism2. Toggle mechanism3. Radial…
  21. If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for…
  22. In a reciprocating steam engine, which of the following forms a kinematic link?
  23. Longitudinal vibrations are said to occur when the particles of a body moves
  24. The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal…
  25. The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is _________…
  26. In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance…
  27. The swaying couple is due to the
  28. The following is the inversion of slider crank chain mechanism
  29. When the addenda on pinion and wheel is such that the path of approach and path of recess are half of…
  30. Which of the following is an inversion of a double slider crank chain?