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An anemometer on a moving vessel measures（）.
A . apparent wind speed only
B . true wind speed and true wind direction
C . true wind speed only
D . apparent wind speed and true wind directio
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The （） of the main shaft should be measured with a （）.
A . clearance；calipers
B . sinking；bridge gauge
C . diameter；bridge gauge
D . clearance；lead wire
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A sling psychrometer is used to measure（）.
A . seawater temperature
B . engine temperature
C . dry bulb and wet bulb temperatures
D . barometric pressure
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Magnetic dip is a measurement of the angle between the（）.
A . geographic pole and the magnetic pole
B . lubber's line and true north
C . horizontal and the magnetic line of force
D . compass heading and the magnetic heading
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Distance along a track line is measured on a Mercator chart by using the （）.
A、latitude scale near the middle of the track line
B、longitude scale near the middle of the track line
C、latitude scale at the multitude of the chart
D、latitude or longitude scale at the middle of the scale
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The pitch of a propeller is a measure of the（）.
A . angle that the propeller makes with a free stream of water
B . angle that the propeller makes with the surface of the water
C . number of feet per revolution the propeller is designed to advance in still water without slip
D . positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without sli
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In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have（）.
A . reset action
B . proportional action
C . two position action
D . rate actio
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Pressure gradient is a measure of（）.
A . a high-pressure area
B . pressure difference over horizontal distance
C . pressure difference over time
D . vertical pressure variatio
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A pyrometer is an instrument commonly used to measure（）
A . cylinder pressure
B . flame intensity
C . exhaust gas temperature
D . crankshaft axial alignment
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Due to the shape of the（），whereby forward- and aft ship are differently shaped，a trim correction on the draft measurement has to be done.
A . spheroid
B . loxodrome
C . carene
D . sphere
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A measurement device for inspecting anchor chain is the（）.
A . slide rule
B . go-no-go gauge
C . derrick tape
D . amp probe
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If your vessel has a list to port due to negative GM and off-center weight，the first corrective measure you should take is to（）.
A . move port-side main-deck cargo to the starboard side
B . fill the starboard double-bottom
C . pump water from the port double-bottom to the starboard double-bottom
D . pump water from the port double-bottom over the side
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A department head set goals for the subordinate periodically and the subordinate is measured how effectively and efficiently each goal has been attained. The method of performance appraisal is called ______.
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EPS is usually measured on a monthly basis.
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Pressure gradient is a measure of ______.
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One of the reasons why business or government has not taken tough measures to stop hacking is that
A．it will cause fear among the public.
B．hacking has not caused much damage.
C．tough measures are illegal.
D．communication may be interrupted.
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An electronic device has been developed to measure the weight of certain Martian particles．
A. Right
B. Wrong
C. Not mentioned
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A sensor is a device that measures a _________ quantity.
A．digital
B．physical
C．electrical
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放大电路如图题4.3.5a所示，已知Vcc=12V,BJT的β=20。若要求AV≥100,ICQ=1mA,试确定Rb、Rc的值，并计算VCEQ设RL=∞。
<img src='https://img2.soutiyun.com/ask/2020-06-28/962210627454752.png' />
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某放大电路中,BJT的三个极A,B,C对地电位分别是10V,6V,6.7V,则
A．A点是集电极，B点是基极
B．A点是发射极，B点是基极
C．A点是发射极，B点是集电极
D．A点是集电极，B点是发射极
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Stock A has an expected return of 20%, and stock B has an expected return of 4%. However, the risk of stock A as measured by its variance is 3 times that of stock B. If the two stocks are combined equ
A．4%
B．12%
C．20%
D．Greater than 20%
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A BJT has measured dc current values of IB = 0.1 mA and IC = 8.0 mA. When IB is varied by 100 μA, IC changes by 10 mA. What is the value of the βdc for this device（）
A．80
B．10
C．100
D．800
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An astronaut has left the International Space Station to test a new space scooter. Her partner measures the following velocity changes, taking place in a 10s interval. At the beginning she is moving t
A．3
B．8
C．12
D．7
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What measure has been planned to save costs？
A．Shortening business hours．
B．Closing offices on holidays．
C．Stopping mail delivery on Saturdays．
D．Computerizing mail sorting processes．
