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Civil Engineering - UPSC Civil Service Exam Questions - Discussion

Discussion Forum : UPSC Civil Service Exam Questions - Section 24 (Q.No. 20)
UPSC Civil Service Exam Questions
20.
The local sidereal time (LST) is always
ahead of the local mean time (LMT) by about 2 hours per month
behind LMT by about 2 hours per month
ahead of LMT by about 4 hours per month
equal to LMT
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
7 comments Page 1 of 1.
Sunil Ph said:   10 months ago
I think the answer is A because the sidereal day starts 4 min earlier than the solar day.
So, sidereal time is 4 min early per day.
Muhammad Mumtaz said:   4 years ago
Anyone explain about sidereal time.
Anonymous said:   4 years ago
Answer should be B.
LoeSher said:   5 years ago
1 local mean day 24 hours=>23hours 56' min 4.09" sec of the sidereal day.

The sidereal time is always behind the LMT.
Mahesh sinh said:   5 years ago
It's ahead 4 minutes per day than in one month.
30*4= 120 minute convert it in hr.
2 hrs per month.
Flora said:   7 years ago
Yeah, it's b, I also agree @Hitesh.
Hitesh said:   9 years ago
In Gupta book, the answer is b.
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