When does boundary lubrication occur?
A. When distances between metal surfaces are wider.
B. Only between two dissimilar metal surfaces.
C. When distances between metal surfaces are narrow.
D. When the primary function of the lubrication is cooling.
Answer: C
You might also like to view...
Four methods of electrical interlocking are available.
Answer the following statement true (T) or false (F)
Electricity can be generated electromagnetically for heavy power consumption only if the following are present: a magnetic field, a conductor, and the ____ motion of the two.
a. relative b. down c. centrifugal d. up
Problem 1.52 Solve Prob. 1.51, assuming that the structure has been redesigned to use 5/16-in.-diameter pins at A and C as well as at B and that no other changes have been made. Problem 1.51 Link AC is made of a steel with a 65-ksi ultimate normal stress and has a 14× 12-in. uniform rectangular cross section. It is con¬nected to a support at A and to member BCD at C by 38-in.-diameter pins, while member BCD is connected to its support at B by a 5 16-in.-diameter pin. All of the pins are made of a steel with a 25-ksi ultimate shearing stress and are in single shear. Knowing that a factor of safety of 3.25 is desired, determine the largest load P that can be applied at D. Note that link AC is not reinforced around the pin holes.
72 × 8 =
A) 656 B) 566 C) 646 D) 576