Glass pipes can be joined by__________________?

Related Mcqs:

1. A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is__________________?

   A. 20 m/sec
   B. 10 m/sec
   C. 5 √2 m/sec
   D. 5 m/sec

2. The capillary rise of mercury is maximum in glass tube of dia _____________ mm?

   A. 0.5
   B. 1
   C. 2
   D. 5

3. The fluid property, due to which, mercury does not wet the glass is__________________?

   A. Surface tension
   B. Viscosity
   C. Cohesion
   D. Adhesion

4. A 0.5 m high bed made up of a 1 mm dia glass sphere (density 2500 kg/m3 ) is to be fluidised by water (density 1000 kg/m3 ). If at the point of incipient fluidisation, the bed voidage is 40%, the pressure drop across the bed is________________?

   A. 4.4 KPa
   B. 2.94 KPa
   C. 3.7 KPa
   D. None of these

5. The valve commonly used in pipes larger than 2″ dia is a______________?

   A. Globe valve
   B. Plug-cock
   C. Gate valve
   D. Check valve

6. If three pipes of different diameters, lengths & friction factors are connected in parallel, then (where, Q = flow rate, V= fluid velocity f = friction factor). ?

   A. Q = Q1 + Q2 + Q3
   B. V1 = V2 = V3
   C. Q1 = Q2 = Q3
   D. f = f1 + f2 + f3

7. What is the ratio of fluid carrying capacity of two pipes having diameters d1 and d2 respectively ?

   A. (d1/d2)0.8
   B. (d1/d2)0.5
   C. d1/d2
   D. (d1/d2)2

8. All pipes of a particular nominal size have the same_________________?

   A. Inside diameter
   B. Outside diameter
   C. Thickness
   D. None of these

9. In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of___________________?

   A. Relative roughness
   B. Absolute roughness
   C. Friction co-efficient for flows at equal Reynold number
   D. All A., B. & C.

10. During ageing of fluid carrying pipes, the__________________?

    A. Pipe becomes smoother with use
    B. Friction factor increases linearly with time
    C. Absolute roughness decreases with time
    D. Absolute roughness increases linearly with time