6. For an unmanned engine room, the necessary descriptions which should be entered in the engine log book to be made _________ by the engineer on duty.
(A) on daily basis.
(B) on weekly basis.
(C) on monthly basis.
(D) on voyage basis.
10. A non-return valve allows flow in one direction only. What kind of valve is above
description?
(A) Check valve
(B) Gate valve
(C) Butterfly valve
(D) Globe valve
21. The _______ are necessary to be conducted in order to unravel those performances of a ship which can not be realistically examined during the dock trials.
(A) shop trials
(B) endurance trials
(C) sea trials
(D) mooring trials
24. Hydraulic drives for deck machinery can be sub-divided into three features. Which
following cannot be?
(A) With variable displacement systems
(B) Constant pressure
(C) Constant volume
(D) Constant temperature
29. What is the temperature at which condensation of moisture begins when the air is
cooled? It is the saturation temperature corresponding to the vapor pressure and relative
humidity.
(A) Wet-bulb temperature
(B) Dry-bulb temperature
(C) Saturating temperature
(D) Dew-point temperature
40. A large fraction of the heat input to an internal-combustion engine is wasted in what?
(A) exhaust gas
(B) thermally insulating material
(C) condenser
(D) constructing material