Please answer the question if you can by reviewing the choices in the MCQ questions

4. (8 marks). Water at a temperature of 20C flows through a D 10cm diameter galvanized iron pipe 6m long and four 90 elbows (regular threaded). The pipeline with elbows is horizontal. Determine the water flowrate if the pressure at the start of the pipe, is 3m of water. 3. Atmospheric pressure is measured using a) barometer b) thermocouple c) Venturimeter d) manometer 4. Water cannot be used in the barometer because it has a) lower vapor pressure than mercury c) lower density than mercury Figher vapor pressure than mercury d) lower viscosity than mercury 5. Continuity equation represents: f) conservation of mass equation b) conservation of viscos flow equation c) conservation of energy equation d) conservation of shear stress equation 6. The relationship between dynamic viscosity () and kinematics viscosity (v) is given b) v= e) =v d) v=gh/ 7. For pipes, turbulent flow occurs when Reynolds number is a) Less than 2100 b) Between 2100 and 4000 g) More than 4000 d) Less than 4000 Page 1 of 5 Scanned with CamScanner Fluid Mechanics MPE 1101 In Semester 2021-2022 8. The line that is everywhere is tangent to the velocity field is called a) pathline b) streakline c) streamline d) none of them 9. The mass per unit volume of a liquid is called P=vm a) fluid viscosity b) fluid density c) fluid surface tension d) fluid compressibility 10. According to continuity equation of a compressible fluid, a) A1V1=A2V2 b) 1A1V1=2A2V2 c) Z1=Z2 d) P1=P2 11. If mercury in a barometer is replaced by water, the height of 0.76m of mercury will be f) 10.3m of water b) 20.3m of water c) 13.3m of water d) 23.3m of water 12. The flow could be descriped by either Eularian method (what happens at fixed point in space) or Lagrangian methode (what happens at a moving individual fluid particle), the relationship between the two methods is called: a) Continuity differential equation f) Reynolds Transport Theorem (RTT) c) Continuity integral equation d) Bernoulli's equation 13. Balloon is stable and safe from overturning possibility because its center of gravity a) is above center of bouncy b) is coincide with center of bouncy c) is below center of bouncy d) none of all 14. A submarine being under water at certain depth when its overall density is a) higher than water density at that level c) double of water density at that level b) lower than water density at that level d) equal to water density at that level