International Date Line and Time

21.International date line is called –
 
A. 0 degree latitude
 
B. 0 degree longitude
 
C. 66½ degrees latitude
 
D. 180 degree longitude
 
Option “D” is correct.
The International Date Line is in the middle of the time zone defined by the 180° meridian.
22.In which year was the International Date Line determined?
 
A. 1662 AD
 
B. 1745 AD
 
C. 1884 AD
 
D. 1947 AD
 
Option “C” is correct.
The international date line, shown here as a yellow line, defines the boundary between calendar dates. The international date line, established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth.
23.To which of the following is the position of the International Date Line closest?
 
A. 0 degree latitude
 
B. 0 degree longitude
 
C. 90 degree east and west longitude
 
D. 180 degree east and west longitude
 
Option “D” is correct.
The international date line, established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth
24.The imaginary line of 180 degree meridian from Greenwich is called –
 
A. International Date Line
 
B. Latitude Line
 
C. Tropic of Capricorn
 
D. Tropic of Cancer
 
Option “A” is correct.
The prime meridian separates the eastern hemisphere from the western hemisphere. Halfway around the world, at 180 degrees longitude, is the International Date Line.
25.Unlike other meridian lines, the International Date Line is made crooked, so that –
 
A. some land areas and island groups can be kept on the same calendar day.
 
B. to facilitate sailors to adjust the time of their watches
 
C. Sailors sailing east to west or west to east could adjust the day in the calendar
 
D. 180 degree E and 180 degree W can be made co-ordinate
 
Option “A” is correct.
26.The International Date Line is not exactly straight because of –
 
A. Coriolis Force
 
B. International Agreement
 
C. Keeping the day and time uniform in different parts of some countries
 
D. All of the above
 
Option “C” is correct.
27.The reason for the deviation of the International Date Line in the North Pacific Ocean is –
 
A. Hawaiian Islands
 
B. Aleutian Islands
 
C. Kuril Islands
 
D. All of the above
 
Option “B” is correct.
It corresponds along most of its length to the 180th meridian of longitude but deviates eastward through the Bering Strait to avoid dividing Siberia and then deviates westward to include the Aleutian Islands with Alaska.
28.If it is 12 noon on the International Date Line, then what will be the standard time of India at that time?
 
A. 6.30 am
 
B. 5.30 pm
 
C. 5.30 am
 
D. 6.30 pm
 
Option “B” is correct.
29.How many time zones can the earth be divided into?
 
A. 2
 
B. 4
 
C. 24
 
D. 64
 
Option “C” is correct.
To facilitate this, the world has been divided into 24 time zones. These time zones have been created with reference to the Prime Meridian itself.
30.From which longitude is the standard time of India taken?
 
A. 82½° W
 
B. 82½° W
 
C. 82½° E
 
D. 82½° E
 
Option “C” is correct
The Indian standard time (IST), is based on longitude 82.5° E, which passes through Mirzapur, near Allahabad in Uttar Pradesh, and is 5 hours 30 minutes ahead of Greenwich Mean Time (GMT).
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