Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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In a gravity oiling system that circulates 150 gallons of oil per minute with a cycle repeated at 5-minute intervals, what is the total amount of oil required in the system?

  1. 600 gallons

  2. 750 gallons

  3. 900 gallons

  4. 1200 gallons

The correct answer is: 750 gallons

To determine the total amount of oil required in a gravity oiling system that circulates 150 gallons of oil per minute with a cycle that repeats every 5 minutes, we start by calculating the total amount of oil circulated during one complete cycle. First, calculate the total oil used in one cycle: - Since the system circulates 150 gallons per minute and the cycle is repeated every 5 minutes, we multiply the flow rate by the cycle duration: \( 150 \, \text{gallons/minute} \times 5 \, \text{minutes} = 750 \, \text{gallons} \). This result implies that during each 5-minute cycle, a total of 750 gallons of oil is circulated through the system. Therefore, the total oil required in the system for effective operation during each cycle is 750 gallons, which aligns with the calculation. Thus, the correct choice reflects the accurate understanding and calculation of the oil circulation over the specified time interval.