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

Related Mcqs:

1. 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

2. 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

3. 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

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

   A. 25
   B. 23
   C. 26
   D. 27

5. A high vapour velocity is required for high plate efficiency in a sieve plate column. The satisfactory value of operating vapor velocity for design purpose in sieve plate column is about _______________ percent of the flooding velocity?

   A. 45
   B. 60
   C. 80
   D. 95

6. 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

7. Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?

   A. Flow rates of each fluid
   B. Type and size of packing
   C. Concentration of each fluid
   D. All A, B. & C.

8. 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

9. Typical static submergence for bubble cap plate column operating at atmospheric pressure may be around _________________?

   A. 2.5″
   B. 0.5″
   C. 5″
   D. 50% of the plate spacing

10. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between ______________________ times the tank diameter?

    A. 1 to 1.5
    B. 2.5 to 3.5
    C. 4 to 5
    D. 6 to 8