20.For an ordinary four-stroke diesel engine, the intake valve is closed .
(A)after TDC (Top Dead Center) (B)before TDC (Top Dead Center) (C)after BDC (Bottom Dead Center) (D)before BDC (Bottom Dead Center)
40. An
indicator diagram is a pressure-volume graph taken from the pressure in the _____of a running engine. (A) crankcase (B) fuelpump (C) scavenging trunk (D) cylinder
22. Select one from the following descriptions which is not meet the requirement of desirable
properties of a primary refrigerant
(A) Boiling Point of the refrigerant should be high.
(B) The refrigerant vapors should be easily condensible.
(C) The refrigerant vapor should have low 'Specific Volume'
(D) Critical Temperature of the refrigerant should be high.
35. The reciprocating motion of the piston is converted to the rotary motion that drives what?
(A) camshaft
(B) turbocharger
(C) crankshaft
(D) governor
20. Which kind of the membrane desalination process can provide a proven capability to
effectively and continuously generate fresh water from seawater?
(A) assimilation
(B) diffusion
(C) dissipation
(D) reverse osmosis
40. What is the quantity of Mean Effective Pressure for that the work done on the piston is
50000kw, the volumes of cylinder at the bottom-dead-centre and at the top-dead-centre are
respectively 80m3and 30m3
.
(A) 500
(B) 700
(C) 800
(D) 1000