更多"The greatest directive force is exe"的相关试题:
[单项选择]The directive force of a gyrocompass（）.
A. increases with latitude，being maximum at the geographic poles
B. decreases with latitude，being maximum at the geographic equator
C. is greatest when a vessel is near the Earth's magnetic equator
D. remains the same at all latitudes
[单项选择]The force exerted by a propeller which tends to throw the stern right or left is called（）.
A. slip
B. sidewise force
C. rotational force
D. thrust
[单项选择]The average pressure exerted on piston during each power stroke is termed（）
A. indicated horsepower
B. mean effective pressure
C. exhaust back pressure
D. compression pressure
[单项选择]Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
A. Water
B. Foam
C. Dry chemical
D. Carbon Dioxide
[单项选择]The pillar shape that gives the greatest strength for the least weight is the（）.
A. octagonal pillar
B. H Beam pillar
C. I Beam pillar
D. circular type pillar
[单项选择]Which fire fighting agent has the greatest capacity for absorbing heat?（）
A. water
B. dry chemical
C. foam
D. CO2
[单项选择]Keel scantlings of any vessel are greatest amidships because（）.
A. connections between forebody and afterbody are most crucial
B. of maximum longitudinal bending moments
C. of severest racking stresses
D. resistance to grounding is at a maximum amidships
[单项选择]Quadrantal error in a gyrocompass has its GREATEST effect（）.
A. in high latitudes
B. near the equator
C. on north or south headings
D. on intercardinal headings
[单项选择]The greatest effect on stability occurs from loose liquids flowing（）.
A. from side to side in the tanks of the vessel
B. from fore to aft in the tanks of a vessel
C. in and out of a vessel that is holed in a wing tank
D. in and out of a vessel that is holed in a peak tank
[单项选择]Security is the greatest enemy.（）
A. 股票投资风险极大。
B. 证券抵押，为害最甚。
C. 高枕无忧是最大的敌人。
D. 过分强调保安，危险反而更大。
[单项选择]Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?（）
A. Salinity of water
B. Temperature of water
C. Atmospheric pressure
D. Type of bottom
[单项选择]By far the greatest item of maintenance of the reciprocating air compressors concerns （）.
A. the lubrication
B. the cooling
C. the moisture separation
D. the valves
[单项选择]The type of current which will have the greatest effect on the course made good for your vessel is（）.
A. one flowing in the same direction as your course steered
B. one flowing in the opposite direction as your course steered
C. one that flows at nearly right angles to your course steered
D. a rotary current in which the direction of current flow constantly changes
[单项选择]The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.
A. loss of residual magnetism
B. absorption of moisture in the insulation
C. insulation varnish flaking
D. dirt collecting on the windings
[单项选择]As the weather was worsening and wind force rising to 8，my vessel（）were yawing within forty degrees of the compass.
A. alongside the wharf
B. grounded in the channel
C. at buoys
D. at anchor
[单项选择]The reaction of a gyrocompass to an applied force is known as（）.
A. precession
B. earth rate
C. gyroscopic inertia
D. gravity effect
[单项选择]Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.
A. back current from the rudder
B. greater pressure on the right or left side of the propeller，depending on rotation
C. lower pressure on the right or left side of the propeller，depending on rotation
D. torque from the velocity and angle at which the surrounding water impinges upon the propeller blades
