A. 1.5 to 2
B. 2.5 to 5
C. 5 to 10
D. 10 to 15
Related Mcqs:
- 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 - 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 - In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a __________________?
A. Clearance of 25-75 mm
B. Cap pitch of 1.3-2 times the cap diameter
C. Either A. or B.
D. Neither A. nor B. - Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger________________?
A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both B. and C. - Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is_____________?
A. More
B. Same
C. Less
D. Twice - In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement ?
A. Results in higher shell side pressure drop
B. Can accomodate less number of tubes for a given shell diameter
C. Facilitates easier shell side cleaning; hence is more suitable for handling high dirt factor shell
side fluid
D. Creates relatively lower turbulence on the shell side resulting in lower shell side heat transfer
co-efficient - In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube) ?
A. 4(P2 – πd2/4)/πd
B. (P2 – rd2/4)/rd
C. 4P2/πd
D. πd/4P2 - Diameter of the sieve tray column is determined by the_________________?
A. Lower limit of vapour velocity
B. Upper limit of the vapour velocity
C. Hole diameter of the sieve tray
D. Height of the plate spacing - 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 - 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
