For a 25 mm hole drilled in plates to be riveted, the shank diameter of the rivet should be _______________ mm?

Related Mcqs:

1. In sieve plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally ______________ times the hole diameter to give the required hole area?

   A. 0.5 to 1.5
   B. 2.5 to 4.0
   C. 5 to 10
   D. 10 to 15

2. Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin’s formula as___________________?

   A. d = 1.1 t
   B. d = 1.6 √t
   C. d = 1.5 t
   D. d = 3 √t

3. To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to ____________________?

   A. 0.5 d
   B. d
   C. 1.5 d
   D. 2.5 d

4. The distance between the centres of a rivet hole to the nearest edge of the plate is called _________________?

   A. Pitch
   B. Margin
   C. Back pitch
   D. None of these

5. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of ______________ times the paddle diameter?

   A. 0.1 to 0.25
   B. 0.3 to 0.5
   C. 0.5 to 0.6
   D. 0.65 to 0.80

6. In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones; because the smaller diameter tubes ______________?

   A. Are easier to clean
   B. Are less prone to fouling
   C. Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
   D. None of these

7. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by ______________ times the hole diameter?

   A. Two
   B. Five
   C. Ten
   D. Twenty

8. A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by_______________?

   A. (ph – dh)/ph
   B. (ph – dh . dt/2)/ph
   C. (ph – dt)/ph
   D. (ph – dh)/dh

9. Holes of a sieve tray are arranged in triangular pitch of _________________ times the hole diameter?

   A. 1.5 to 2
   B. 2.5 to 5
   C. 5 to 10
   D. 10 to 15

10. Hole diameter of the sieve trays in the distillation column ranges from ______________ mm?

    A. 1 to3
    B. 4 to 8
    C. 3 to 12.5
    D. 12.5 to 18.5