7. The diameters of a small piston and a large piston of a hydraulic jack are 2 cm and 10 em respectively, A force of 60 N is applied on the small piston. Find the load lifted by the large piston, when : (a) the pistons at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jack is [Ans. (a) 1500 N, (b) 1520.5 NJ given as 1000- low the frne curfao
7. The diameters of a small piston and a large piston of a hydraulic jack are 2 cm and 10 em respectively, A force of 60 N is applied on the small piston. Find the load lifted by the large piston, when : (a) the pistons at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jack is [Ans. (a) 1500 N, (b) 1520.5 NJ given as 1000- low the frne curfao
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
![7. The diameters of a small piston and a large piston of a hydraulic jack are
force of 60 N is applied on the small piston. Find the load lifted by the large piston, when : (a) the pistons
at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jack is
given as 1000 .
respectively. A
kg
[Ans. (a) 1500 N, (b) 1520.5 NJ
8. Determine the gauge and absolute pressure at a point which is 2.0 m below the free surface of water. Take
[Ans. 1.962 N/em (gauge), 12.066 N/cm2 (abs.)]
m'
atmospheric pressure as 10.1043 Nicm.
9. A simple manometer is used to measure the pressure of oil (sp. gr, 0.8) flowing in a pipe line. Its right
limb is open to the atmosphere and left limb is connected to the pipe. The centre of the pipe is 9 cm below
the level of mercury (sp. gr. 13.6) in the right limb. If the difference of mercury level in the two limbs is 15
[Ans. 12.058 N/em²|
cm, determine the absolute pressure of the oil in the pipe in N/cm.
10. A simple manometer (U-tube) containing mercury is connected to a pipe in which an oil of sp. gr. 0.8 is
flowing. The pressure in the pipe is vacuum. The other end of the manometer is open to the atmosphere.
Find the vacuum, pressure in pipe, if the difference of mercury level in the two limbs is 20 cm and height
[Ans. -27.86 Nlem)
11. A single column vertical manometer (l.e., micrometer) is connected to a pipe containing oil of sp. gr. 0.9.
The area of the reservoir is 80 times the area of the manometer tube. The reservoir contains mercury of
sp. gr. 13.6. The level of mercury in the reservoir is at a height of 30 cm below the centre of the pipe and
difference of mercury levels in the reservoir and right limb is 50 cm. Find the pressure in the pipe.
(Ans. 6.474 N/em)
of oil in the left limb from the centre of the pipe is 15 cm below.
12. A pipe contains an oil of sp. gr. 0.8. A differential manometer connected at the two points A and B of the
pipe shows a difference in mercury level as 20 cm. Find the difference of pressure at the two point
(Ans. 25113.6 Nm]
13. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon
tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N/cm and pipe B contains oll of
sp. gr. 0.8 under a pressure of 11.772 N/em". The pipe A lies 2.5 m above pipe B. Find the difference of
pressure measured by mercury as fluid filling U-tube.
14. A differential manometer is connected at the two points A and B as shown in Fig. 2.25. At B air pressure
is 7.848 N/cm (abs.), find the absolute pressure at A.
[Ans. 31.36 cm of mercuryl
[Ans, 6.91 N/em)
AIR
BWATER
OIL Sp. gr.0.8
OIL Sp. gr.
0.8
50'cm
I.
30 cm
2 cm
100 am
10 cm
50 cm
MERCURY
Sp. gr.13.6
WATER
Fig. 2.25
Fig. 2.26](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa5e61061-3651-4eac-ba46-9c0724973c81%2F9e500c17-f704-452c-8e19-759d57eb04d1%2Fwvwkyjs_processed.jpeg&w=3840&q=75)
Transcribed Image Text:7. The diameters of a small piston and a large piston of a hydraulic jack are
force of 60 N is applied on the small piston. Find the load lifted by the large piston, when : (a) the pistons
at the same level, and (b) small piston is 20 cm above the large piston. The density of the liquid in the jack is
given as 1000 .
respectively. A
kg
[Ans. (a) 1500 N, (b) 1520.5 NJ
8. Determine the gauge and absolute pressure at a point which is 2.0 m below the free surface of water. Take
[Ans. 1.962 N/em (gauge), 12.066 N/cm2 (abs.)]
m'
atmospheric pressure as 10.1043 Nicm.
9. A simple manometer is used to measure the pressure of oil (sp. gr, 0.8) flowing in a pipe line. Its right
limb is open to the atmosphere and left limb is connected to the pipe. The centre of the pipe is 9 cm below
the level of mercury (sp. gr. 13.6) in the right limb. If the difference of mercury level in the two limbs is 15
[Ans. 12.058 N/em²|
cm, determine the absolute pressure of the oil in the pipe in N/cm.
10. A simple manometer (U-tube) containing mercury is connected to a pipe in which an oil of sp. gr. 0.8 is
flowing. The pressure in the pipe is vacuum. The other end of the manometer is open to the atmosphere.
Find the vacuum, pressure in pipe, if the difference of mercury level in the two limbs is 20 cm and height
[Ans. -27.86 Nlem)
11. A single column vertical manometer (l.e., micrometer) is connected to a pipe containing oil of sp. gr. 0.9.
The area of the reservoir is 80 times the area of the manometer tube. The reservoir contains mercury of
sp. gr. 13.6. The level of mercury in the reservoir is at a height of 30 cm below the centre of the pipe and
difference of mercury levels in the reservoir and right limb is 50 cm. Find the pressure in the pipe.
(Ans. 6.474 N/em)
of oil in the left limb from the centre of the pipe is 15 cm below.
12. A pipe contains an oil of sp. gr. 0.8. A differential manometer connected at the two points A and B of the
pipe shows a difference in mercury level as 20 cm. Find the difference of pressure at the two point
(Ans. 25113.6 Nm]
13. A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon
tetrachloride having a specific gravity 1.594 under a pressure of 11.772 N/cm and pipe B contains oll of
sp. gr. 0.8 under a pressure of 11.772 N/em". The pipe A lies 2.5 m above pipe B. Find the difference of
pressure measured by mercury as fluid filling U-tube.
14. A differential manometer is connected at the two points A and B as shown in Fig. 2.25. At B air pressure
is 7.848 N/cm (abs.), find the absolute pressure at A.
[Ans. 31.36 cm of mercuryl
[Ans, 6.91 N/em)
AIR
BWATER
OIL Sp. gr.0.8
OIL Sp. gr.
0.8
50'cm
I.
30 cm
2 cm
100 am
10 cm
50 cm
MERCURY
Sp. gr.13.6
WATER
Fig. 2.25
Fig. 2.26
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