Which of the following ride on a thin film of oil within a system of bearing
(a) the crankshaft main journals and rod journals (b) compression rings and
oil rings (c) valve stems (d) all of these.
which oil pump requires a pressure relief valve to regulate the output pressure
(a) gear pump (b) rotary pump (c) vane pump (d) all of these.
an oil filter designed for a newer car (a) should never need to be replaced
(b) returns all of the filtered oil to the sump (c) may contain a relief valve that
opens if the filter clogs (d) all of these.