GATE 2019: Fluid Mechanics Quiz 7

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Question 1

A manometer is used to measure the pressure in a tank. The fluid used has a specific gravity of 0.86, and the manometer column height is 50 cm, as shown in figure If the local atmospheric pressure is 100 kPa, calculate the absolute pressure within the tank.
Take the standard density of water to be 1000 kg/m³.

• A104.21 kPa
• B100.6 kPa
• C96.50 kPa
• D110.5 kPa

Question 2

Determine the specific gravity of the liquid Y for the fig. given below. consider vacuum pressure at A.

• A1.59
• B0.896
• C1.26
• D1.406

Question 3

Water (p = 1000 kg/) flows through a venturimeter with inlet diameter 80 mm and throat diameter 40 mm. The inlet and throat gauge pressures are measured to be 400 kPa and 130 kPa respectively. Assuming the venturimeter to be horizontal and neglecting friction, the inlet velocity (in m/s) is

• A4 m/sec
• B2 m/sec
• C6 m/sec
• D1 m/sec

Question 4

A fluid jet is discharging froma 100 mm nozzle and the vena contracta formed has a diameter of 90 mm. If the coefficient of velocity is 0.98, then the coefficient of discharge for the nozzle is:

• A0.673
• B0.794
• C0.872
• D0.971

Question 5

What is the intensity of pressure in the following S.I. units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400 KPa ?

• A0.3 bar or 4.077 m of water or 0.299m of Hg
• B4 bar or 5.077 m of water or 0.399 m of Hg
• C0.3 bar or 5.077 m of water or 0.599 m of Hg
• D4 bar or 40.77 m of water or 2.99 m of Hg

Question 6

The pressure difference of two very light gases in two rigid vessels is being measured by a vertical U- tube water filled manometer. The reading is found to be 10 cm. What is the pressure difference?

• A9.81 kPa
• B0.0981 bar
• C98.1 Pa
• D981 N/m²

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