4047. Maximum size of the raschig rings used in a packed tower is about __________ of the coloumn diameter.
1/10th
1/20th
1/30th
1/50th
✅ The correct answer is option C.
4048. The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress.
yield point
breaking
ultimate
none of these
✅ The correct answer is option C.
4053. With increase in the number of shell passes, the value of FT
increases
decreases
remains same
remains same, only if the number of tube passes does not change.
✅ The correct answer is option A.
4022. The stress developed in a material without any permanent set is called the
ultimate stress
yield stress
elastic limit
breaking stress
✅ The correct answer is option C.
4029. Joint efficiency (J) for a seamless pipe is
1
0.85
1.2
< 0.5
✅ The correct answer is option A.
4032. In inclined long tube vertical evaporators, the tubes are inclined at an angle of
15°
90°
45°
60°
✅ The correct answer is option C.
4037. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 metres is __________ cms.
5
15
7.5
50
✅ The correct answer is option B.
4042. Hoop (circumferential) stress induced in a thin walled ‘Horton Sphere’ used for the storage of liquid ammonia under pressure is
✅ The correct answer is option A.
4049. Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.
5-Oct
15-20
30-35
35-40
✅ The correct answer is option B.