Selected MCQ

Current Question
A river 2 m deep and 45 m wide flows at 3 km/h. What volume of water flows per minute?
  • A. 4500 m³
  • B. 27000 m³
  • C. 3000 m³
  • D. 2700 m³
Correct Answer: A
Explanation:
Volume = area × velocity ⇒ 4500 m³/min.
Related Question 1
Water from one container fills otheRs. What is the total volume?
  • A. 648
  • B. 888
  • C. 928
  • D. 1184
Correct Answer: D
Explanation:
Conservation of volume.
Related Question 2
A water tank is two-fifths full. Pipe A fills it in 10 minutes, and pipe B empties it. What is the required time?
  • A. 6 min to empty
  • B. 6 min to fill
  • C. 9 min to empty
  • D. 9 min to fill
Correct Answer: A
Explanation:
Net rate depends on the stronger pipe; here, emptying dominates.
Related Question 3
A tank is 7 m long and 4 m wide. What speed is needed for water flow?
  • A. 12 km/hr
  • B. 10 km/hr
  • C. 14 km/hr
  • D. None
Correct Answer: B
Explanation:
Flow rate derived from volume/time.
Related Question 4
A tank 3 m long, 2 m wide, and 1.5 m deep is dug. If soil is spread over a field, what is the rise in level?
  • A. 0.299 cm
  • B. 0.29 cm
  • C. 2.98 cm
  • D. 4.15 cm
Correct Answer: C
Explanation:
Volume ÷ field area.
Related Question 5
Pipes P, Q, R fill the tank in 20, 15, 12 minutes. Together fill in ____.
  • A. 5 min
  • B. 10 min
  • C. 15 min
  • D. 20 min
Correct Answer: A
Explanation:
Combined rate.