18. The type of traps is suited at the steam piping of high pressure.
And the trap consists of a disc and set ring. Which trap is above
description?
(A) Magnetic traps
(B) Mechanical traps
(C) Thermodynamic traps
(D) Vacuum traps
31.The combustion process in a diesel cylinder is considered to occur in four phases, which begin
with compression process and end with process.
(A)intake
(B)expansion
(C)scavenging
(D)isentropic ignition