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 Nem') ch an oil of sn er 08 is cm, determine the absolute pressure of the oil in the pipe in N/cm.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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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 Niem']
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 vačuum. 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 Nicm]
11. A single column vertical manometer (i.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 Nicm')
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 poins
(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 ail 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
[Ans. 31.36 cm of mercury
14. A differential manometer is connected at the two points A and B as shown in Fig. 2.25. At B air presse
[Ans. 6.91 Nem)
cm, determine the absolute pressure of the oil in the pipe in N/cm.
of oil in the left limb from the centre of the pipe is 15 cm below.
pressure measured by mercury as fluid filling U-tube.
is 7.848 N/cm (abs.), find the absolute pressure at A.
AIR
WATER
OIL Sp. gr.0.8
OIL Sp. gr.
0.8
60'cm
30 cm
100 am
MERCURY
Sp. gr. 13.6
WATER
Fig. 2.25
Fig. 2.26
Transcribed Image Text: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 Niem'] 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 vačuum. 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 Nicm] 11. A single column vertical manometer (i.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 Nicm') 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 poins (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 ail 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 [Ans. 31.36 cm of mercury 14. A differential manometer is connected at the two points A and B as shown in Fig. 2.25. At B air presse [Ans. 6.91 Nem) cm, determine the absolute pressure of the oil in the pipe in N/cm. of oil in the left limb from the centre of the pipe is 15 cm below. pressure measured by mercury as fluid filling U-tube. is 7.848 N/cm (abs.), find the absolute pressure at A. AIR WATER OIL Sp. gr.0.8 OIL Sp. gr. 0.8 60'cm 30 cm 100 am MERCURY Sp. gr. 13.6 WATER Fig. 2.25 Fig. 2.26
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