Accidents in chemical plants are mostly due to___________________?

Related Mcqs:

1. Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to___________________?

   A. G0.2
   B. G0.5
   C. G0.8
   D. G1.5

2. A ‘rupture disc’ is provided in chemical equipments as an accessory meant for ___________________?

   A. Relieving excess pressure
   B. Creating turbulence
   C. Enhancing mixing rate
   D. Avoiding vortex formation

3. Apex angle of conical heads used in the bottom heads of chemical process equipments is usually__________________?

   A. 30°
   B. 45°
   C. 60°
   D. 75°

4. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about ______________ kms?

   A. 1
   B. 5
   C. 15
   D. 25

5. Corrosion allowance in the design of pressure vessel/chemical equipment is not necessary, if___________________?

   A. Plain carbon steel and cast iron parts are used
   B. Wall thickness is > 30 mm
   C. Material of construction is high alloy steel
   D. Both B. & C.

6. Fresh water carrying pipelines in chemical industries are coloured with _______________ color?

   A. Sea green
   B. Brown
   C. Yellow
   D. Red

7. Welded joint efficiency in the design of chemical process equipment is taken as_________________?

   A. 0.55
   B. 0.75
   C. 0.85
   D. 0.95

8. Safety valves are provided in chemical equipments to guard against excessive_________________?

   A. Temperature
   B. Pressure/pressure fluctuation
   C. Turbulence
   D. Noise

9. Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around______________________?

   A. 5 and 10
   B. 45 and 75
   C. 180 and 300
   D. 300 and 500

10. The force due to wind load acting on a tall vessel depends upon its___________________?

    A. Shape
    B. Outside diameter
    C. Height
    D. All A, B. & C.