海船船员考试

单选题The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the（）.A horizontal parallax decreasesB observer's height above sea level increasesC humidity of the atmosphere decreasesD altitude of the body decreases

题目
单选题
The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the（）.
A

horizontal parallax decreases

B

observer's height above sea level increases

C

humidity of the atmosphere decreases

D

altitude of the body decreases

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相似问题和答案

第1题：

3GWCDM网络中,网络通过发送()消息控制手机进行测量。

A.measurement report

B.measurement control

C.measurement command

D.measurement object


参考答案：B

第2题：

A time diagram is a diagram of the celestial sphere as observed from above the ______.

A.south celestial pole

B.north celestial pole

C.observer's meridian

D.Greenwich meridian


正确答案：A

第3题：

Two sources of variation in the length of hex bolts exist. Production variation and measurement error. The QC manager knows that the standard deviation from these sources is 0.24" and 0.43" , respectively. What is the total standard deviation.

A . .10 inch.

B . .19 inch.

C . .34 inch.

D . .49 inch.

E . .67 inch.


正确答案：D

第4题：

如果安装了语音系统，“ALTITUDE”表示什么？


正确答案:如果安装了语音系统，“ALTITUDE”表示预选高度前1000英尺。

第5题：

The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the ______.

A.horizontal parallax decreases

B.observer's height above sea level increases

C.humidity of the atmosphere decreases

D.altitude of the body decreases


正确答案：D

第6题：

A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?

A.The motion of the apparent sun is along the ecliptic

B.Measurement of time is along the celestial equator

C.The speed of the Earth's revolution is not constant

D.There are variations in the Earth's rotational speed


正确答案：B

第7题：

A time diagram is a diagram on the plane of the ______.

A.celestial meridian

B.celestial equator

C.celestial horizon

D.principal vertical circle


正确答案：B

第8题：

Officers use sextants to observe ___天体____.

A.stars

B.celestial bodies

C.the sun

D.the moon


正确答案：B

第9题：

The most accurate method of determining gyrocompass error while underway is by ______．

A.Comparing the gyro azimuth of a celestial body with the computed azimuth of the body

B.Comparing the gyro heading with the magnetic compass heading

C.Determining from the chart the course made good between celestial fixes

D.It cannot be determined accurately at sea due to drift of unknown currents


正确答案：A

第10题：

“标高”、“高度”和“高”分别用英文elevation，altitude，height表示。


正确答案:正确

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