8.8. What is the tightening(loosing)tool that uses separate sockets to fit different sizes of
nuts and bolts?
(A) saw
(B) file
(C) socket wrench
(D) vise
15.15. The ______ is a box structure made of cast iron employing the double wall system.
(A) piston
(B) crankshaft
(C) cylinder block
(D) connecting rod
18.18. If the turbocharger can not work properly, what action should be taken with reduced load?
(A) non-supercharged running
(B) full speed running
(C) astern operation
(D) normal operation
25.25. The _______ is a stamp forging made of special steel and has been induction
hardened/guenched together with crank pins and journals.
(A) bedplate
(B) crankshaft
(C) frames
(D) hook
38.38. Which position of the control lever in the wheel house for the main engine shall be set in
order to prevent the ship from starting to move?
(A) FULL AHEAD
(B) ASTERN
(C) NEUTRAL
(D) AHEAD
39.39. What type of fire extinguisher can be used to extinguish electrical fire?
(A) CO2
fire extinguisher
(B) water fire extinguisher
(C) wet chemical fire extinguisher
(D) foam fire extinguisher