更多"For a propeller direct driven by th"的相关试题:
[单项选择]（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
[单项选择]Most often （） is attached to the engine-propeller shaft for efficient electric power generation.
A. a variable-speed AC generator
B. a fixed-speed AC generator
C. an air blower
D. a DC generator
[单项选择]Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to（）
A. facilitate bi-directional operation
B. provide the greatest pump efficiency
C. prevent pump clogging from marine growth
D. prevent cavitation at the pump outlet
[单项选择]A power-driven vessel shall have her engine ready for（）when the visibility is restricted.
A. immediately stop
B. immediately maneuvering
C. immediately anchoring
D. immediately going astern
[单项选择]A diesel engine piston ring face is in direct contact with the （）.
A. top of the ring groove
B. cylinder liner oil film
C. bottom of the ring groove
D. back of the ring groove
[单项选择]Fishing gear fouled（）propeller.
A. we
B. me
C. I
D. my
[单项选择]Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.
A. inside micrometer
B. feeler gauge
C. adjustable trammel
D. sighting device
[单项选择]Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed （）.
A. apparent slip
B. tree slip
C. pitch
D. propulsive efficiency
[单项选择]The difference between Fixed pitch propeller (FPP) and Controllable pitch propeller (CPP) is in that（）
A. for FP, once fitted, the position of the blades can also be changed in operation
B. for CP, once fitted, the position of the blades can also be changed in operation
C. the CP type has a relatively smaller hub compared with the FP propellers
D. the FP type has a relatively larger hub compared with the CP propellers
[单项选择]Compared to a constant pitch propeller, a controllable pitch propeller（）.
A. more efficiently uses available engine power
B. operates at a lower efficiency at a fixed speed
C. produces the same torque at lower engine power
D. develops its rated power at a lower speed
[单项选择]When the propeller blades are integral with the hub, the propeller is called a （）.
A. built up propeller
B. solid propeller
C. controllable pitch propeller
D. suction back propeller
[单项选择]The propeller is pushed on to the tubeshaft taper and made tight by（）
A. a mechanical seal
B. keyway and key
C. a nut
D. shrinkage
[单项选择]Propeller running at （） are generally efficient.
A. high speeds
B. medium speed
C. low speeds
D. the same speed with the engine
[单项选择]When viewed from astern, if the propeller revolves in a clockwise direction when going ahead, it is known as （）.
A. ahead direction
B. astern direction
C. right-handed
D. left-handed
[单项选择]Engine coolant accumulating in the diesel engine lubricating oil can result from a （）
A. low oil pressure
B. high coolant pressure
C. leaking fuel injector
D. cracked cylinder head or liner
[单项选择]A right-handed propeller will cause the survival craft to（）.
A. walk the stern to starboard in reverse
B. walk the stern to port in reverse
C. run faster than a left-handed propeller
D. right itself if capsized
