- 1(current)
Q. No.A water spray gun is attached a hose of cross sectional area \(30~\text{cm}^2.\) The gun comprises of \(10\) perforations each of cross sectional area of \(15~\text{mm}^{2}.\) If the water flows in the hose with the speed of \(50~\text{cm/s},\) calculate the speed at which the water flows out from each perforation. (Neglect any edge effects)
1. \(100~\text{m/s}\)
2. \(10~\text{m/s}\)
3. \(1000~\text{m/s}\)
4. \(15\times 10^{2}~\text{m/s}\)
1. \(100~\text{m/s}\)
2. \(10~\text{m/s}\)
3. \(1000~\text{m/s}\)
4. \(15\times 10^{2}~\text{m/s}\)
Subtopic: Â Equation of Continuity |
 72%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
A liquid of density \(600~\text{kg/m}^3\) flowing steadily in a tube of varying cross-section. The cross-section at a point \(A\) is \(1.0~\text{cm}^2\) and that at \(B \) is \(20~\text{mm}^2\). Both the points \(A\) and \(B\) are in same horizontal plane, the speed of the liquid at \(A\) is \(\text{cm/s}\). The difference in pressure at \(A\) and \(B\) points is: (in Pa)
1. \(18\)
2. \(144\)
3. \(36\)
4. \(72\)
1. \(18\)
2. \(144\)
3. \(36\)
4. \(72\)
Subtopic: Â Equation of Continuity |
 68%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
A tube of length \(L\) is shown in the figure. The radius of cross section at the point \((1)\) is \(2~\text{cm}\) and at the point \((2)\) is \(1~\text{cm},\) respectively. If the velocity of water entering at point \((1)\) is \(2~\text{m/s},\) then velocity of water leaving the point \((2)\) will be:
1. \(4~\text{m/s}\)
2. \(8~\text{m/s}\)
3. \(6~\text{m/s}\)
4. \(2~\text{m/s}\)
1. \(4~\text{m/s}\)
2. \(8~\text{m/s}\)
3. \(6~\text{m/s}\)
4. \(2~\text{m/s}\)
Subtopic: Â Equation of Continuity |
 82%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
An ideal incompressible fluid flows steadily through a pipe of varying cross-sectional diameter. The maximum and minimum diameters of the pipe are \(6.4~\text{cm}\) and \(4.8~\text{cm},\) respectively. What is the ratio of the minimum fluid speed to the maximum fluid speed?
1. \(\dfrac{3}{4}\)
2. \(\dfrac{81}{256}\)
3. \(\dfrac{\sqrt{3}}{2}\)
4. \( \dfrac{9}{16}\)
Subtopic: Â Equation of Continuity |
 81%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Consider a water jar of radius \({R}\) that has water filled up to height \({H}\) and is kept on a stand of height \({h}\) (see figure). Through a hole of radius \({r(r<<R)}\) at this bottom, the water leaks out and the stream of water coming down towards the ground has a shape like a funnel as shown in the figure. If the radius of the cross-section of the water stream when it hits the ground is \({x,}\) then the value of \(x\) will be:
| 1. | \({x=r}\left({H\over H+h}\right)^2\) | 2. | \({x=r}\left({H\over H+h}\right)\) |
| 3. | \(x=r\left(\frac{H}{H+h}\right) ^\frac{1}{4}\) | 4. | \(x=r\left(\frac{H}{H+h}\right) ^\frac{1}{2}\) |
Subtopic: Â Equation of Continuity |
 70%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.