更多"Leg penetration to depths which req"的相关试题:
[单项选择]
Leaky exhaust valve will result in which of the following?（）
(1) high exhaust temperature;
(2) low compression pressure;
(3) low firing pressure.
A. (1) and (2)
B. (1) only
C. (2) only
D. (1),(2) and (3)
[单项选择]As a watch officer when bunkering, which of the following does require his individual attention?（）
A. draft of the vessel
B. rate of delivery
C. communication with terminal personnel
D. observation of manifold valves
[单项选择]Which condition represents the appropriate time for setting off distress flares and rockets? （）
A. Only when there is a chance of their being seen by rescue vessels
B. At half hour intervals
C. At one hour intervals
D. Immediately upon abandoning the vessel
[单项选择]Which of the following firing order may be used for an 6 cylinder engine?（）
A. 1-2-3-4-5-6
B. 1-2-3-6-5-4
C. 1-5-3-6-2-4
D. 1-3-4-5-6-2
[单项选择]The total leg load reactions on an independent leg，self-elevating unit include static and（）.
A. environmental loading
B. variable loading
C. fixed loading
D. basic loading
[单项选择]Depths in the routes (Malacca and Singapore Straits) vary between 20m and about 23m but there are many areas of sand waves and depths are liable to change. The statement infers that（）.
A. depths in Malacca and Singapore Straits are stable
B. depths in Malacca and Singapore Straits are changeable
C. depths in Malacca and Singapore Straits are invariable
D. depths in Malacca and Singapore Straits are the same all the time
[单项选择]Charted depths are decreased（）2 meters．
A. in
B. on
C. with
D. by
[单项选择]Charted depths（）by 2 meters due to state of the winds．
A. is decreased
B. decreased
C. decreases
D. are decreased
[单项选择]设混频器的本振频率为fo，输入信号频率为fs，输出信号频率为fi，满足fo=fs+fi。若有干扰信号fn=fo+fi，则该干扰称为（）
A. 交调干扰
B. 互调干扰
C. 镜像干扰
D. 中频干扰
[单项选择]如果干扰信号频率关系符合fR=fo±2f中（fo为本振，f中为中频），则是属于哪种干扰（）。
A. 镜像
B. 互调
C. 交调
D. 阻塞
[单项选择]Calibration Stations give special transmissions for the calibration of ship’s（）.
A. gyro-compass
B. marine radar
C. DF
D. navigational satellite
[单项选择]— Mike injured his leg playing football yesterday. — Really?（）
A. Who did that?
B. What’s wrong with him?
C. How did that happen?
D. Why was he so careless?
[单项选择]In comparison to electric power，hydraulic power for jacking systems has the advantage of（）.
A. better control capabilities
B. less maintenance and repair
C. fewer personnel needed during jacking
D. less preload needed
[单项选择]Electrical supply is always needed even if only for lighting so after a ship goes into service it is extremely rare for the main bus-bars to be dead, it therefore follows that the bus-bars are continuously alive（） the life of the ship.
A. along
B. will
C. throughout
D. for
[单项选择]Apparent altitude is sextant altitude corrected for（）.
A. parallax and personal error
B. inaccuracies in the reading and reference level
C. visibility and magnitude
D. All of the above are correct
[单项选择]David injured his leg playing football yesterday. Really?（）
A. Who did that?
B. What's wrong with him?
C. How did that happen?
D. Why was he so careless?
