Quantitative Aptitude · Reasoning

Time and Clocks

562 Questions

Time and clocks problems evaluate quantitative aptitude by testing concepts on clock gains, losses, and relative speeds of hands. Questions also cover global time zones and standard time calculations. These logical reasoning topics frequently appear in SSC and banking exams.

Clock gain or lossTime zonesAngle between handsStandard time calculationPrecise time measurement

Time and Clocks Questions

Multiple choice

Rotational delay time is also known as

  1. Seek time

  2. Shift time

  3. Latency

  4. Access time
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rotational delay, or latency, is the time required for the desired data sector on a disk to rotate under the read/write head after the head has reached the correct track.

Multiple choice

The cls in which must not only be the same butalso must not deviate from the real time by more than certain amount then those clocks are called as

  1. Physical clock

  2. Real clock

  3. Logical clock

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Physical clocks are hardware clocks that must not only be the same but must also not deviate from real time by more than a certain amount. They have bounded drift rates. Real clocks and logical clocks are different concepts - logical clocks track event ordering without reference to real time. The question tests understanding of physical clock precision requirements.

Multiple choice

240 minutes is equal to how many hours?

  1. 10

  2. 3

  3. 5

  4. 4

  5. 60
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To calculate the hours from the minutes we have to divide minutes from the 60 as every hour has 60 minutes. Like wise, here in this question we will divide 60 from 240. So the answer will be 4. So the 240 minutes is equal to 4 hours.

Multiple choice

How will you write 10 PM as 24 hour clock?

  1. 10:00 hrs

  2. 11:00 hrs

  3. 22:00 hrs

  4. 23:00 hrs

  5. 9:00 hrs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a right answer, as if we see time in 24 hours clock then 10 PM will be written as 22:00 hrs.

Multiple choice

Which of the hand moves fastest in the clock?

  1. Hour hand

  2. Minute hand

  3. Second hand

  4. Both minute and second hand

  5. All hands move at the same speed
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Second hand is the thinnest hand, it moves faster than the other two hand. Second hand moves 1440 times in 24 hours.

This is the correct option.

Multiple choice

Ten past 9 in the evening is written as:

  1. 10.9 PM

  2. 9.10 PM

  3. 9.10 AM

  4. 8.50 PM

  5. 8.50 AM
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the right answer.

10 past nine in the evening is 9.10 PM.

10 past nine in the morning will be written as 9.10 AM.

Multiple choice

Consider the following statements regarding Indian Standard Time (IST):

1.         IST is standardised according to the 82.5° E longitude passing through Shankargarh fort in Allahabad. 2.         Bagaan time was introduced by British tea planters over 150 years ago and was set half an hour ahead of IST.

Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1: It is correct. Indian Standard Time is calculated on the basis of 82.5° E longitude, passing through Shankargarh fort, Mirzapur near Allahabad in the state of Uttar Pradesh. British India did not adopt the international standard time zones until 1905 when the meridian passing through Allahabad at 82.5° E (Mirzapur) of Greenwich Meridian longitude was picked as the central meridian for India, corresponding to a single time zone for the country at 5 hours and 30 minutes in advance of GMT. Statement 2: It is incorrect. Bagaan Time a.k.a. Chaibagaan Time introduced by British people more than 150 years ago, was set one hour ahead of IST for tea estates, collieries and oil industry of Assam. Moreover, Bureau of Energy Efficiency commissioned a study on quantifying energy savings through advancing IST, based on a paper published by them in Current Science in 2007. Their final report was submitted in September 2011 where it was proposed to advance the IST by half an hour to avoid the problems apprehended with respect to two time zones and DST (Daylight Saving Time). Hence, the correct option is 1.