1. 2 (Tb + Tw)
2. (Tb + Tw)/2
3. 2 (Tb - Tw)
4. (Tb - Tw)/2
(Tb + Tw)/2
1. By the weight of the fluid element
2. By the hydrostatic force on the element
3. By the buoyancy forces arising from variation in density of the fluid with the temperature
4. None of these
By the buoyancy forces arising from variation in density of the fluid with the temperature
1. Free convection
2. Forced convection
3. Combined convection
4. None of these
Forced convection
1. Q = hA/(Ts – Tf)
2. Q = h/A(Ts – Tf)
3. Q = hA(Ts – Tf)
4. Q = (Ts – Tf)/hA
Q = hA(Ts – Tf)
1. Pr = 1
2. Pr > 1
3. Pr < 1
4. Pr = Nu
Pr = Nu
1. 18 mm
2. 16 mm
3. 12 mm
4. 8 mm
18 mm
1. Increase
2. Decrease
3. Remain the same
4. Vary depending upon the electrical conductivity of the wire
Increase
1. 692.5 W/m2k
2. 714.5 W/m2k
3. 742 W/m2k
4. 764.5 W/m2k
692.5 W/m2k
1. Melt spinning process
2. Injection molding process
3. Calendaring process
4. Rotomolding process
Calendaring process
1. The original material
2. the powder before compaction
3. The powder after compaction
4. the product after sintering and compaction
The powder after compaction