A. Screwing
B. Welding
C. Brazing
D. All A., B. and C.
Related Mcqs:
- (Le/D) for a Tee (used as elbow, entering run) would be around _______________________?
A. 5
B. 60
C. 160
D. 200 - In a heat exchanger, shell side fluid velocity can be changed by changing the tube _______________________?
A. Layout
B. Pitch
C. Both A. & B.
D. Neither A. nor B. - In packed towers provided with pall rings liquid redistributors are positioned at heights of every 6 metres or 5-10 times the column diameter, whichever is less. Maximum size of the pall rings should not exceed _______________________ of the column diameter?
A. 1/10-1/15th
B. 1/5-1/10th
C. 1/20-1/30th
D. 1/2 to 1/4th - For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec, ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches) ?
A. Di, opt = 3.9 Q0.45 ρ0.13
B. Di, opt = 3.9 Q0.45. μ0.95
C. Di, opt = 4.7 Q0.36. μ3.2ρ0.13
D. Di, opt = 3 Q0.36. μ0.88 - The normal range of velocity of steam in pipes is _________________________ m/sec?
A. 0.1-0.5
B. 1-5
C. 10-20
D. 80-100 - The normal range of velocity of water in pipes is _______________ m/sec?
A. 0.1-0.5
B. 1-2
C. 10-50
D. 15-30 - Normal screwed fittings are used for pipes upto a diameter of _______________ inches?
A. 1.5
B. 3
C. 5
D. 9 - A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of_________________?
A. 2
B. 20.8
C. 20.2
D. None of these - For high pressure process equipments/vessels, the connected nozzle should be____________________?
A. Welded
B. Screwed
C. Flanged
D. Brazed - Which of the following is the best tube material from thermal conductivity point of view alone ?
A. Aluminium
B. Stainless steel
C. Copper
D. Carbon steel
