A. 19
B. 38
C. 67
D. 95
A. -q
B. -q/(1-q)
C. -q/(q-1)
D. None of these
A. Minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch
B. Minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto
15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than
tube diameter
C. O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres
D. All A., B. & C.
A. Is economical in operation
B. Employs high velocity, high heat transfer rate and less heating surface requirement
C. Employs a centrifugal pump placed between external downtake from vapor drum and inlet to
tube bundle
D. Both B. & C.
A. Characteristic of process fluid
B. Velocity of process fluid containing suspended solids
C. Suspended solids in the fluid
D. All A., B. and C.
A. If its diameter is less than 15-20metres
B. If its diameter is more than 50 meters
C. If the thickness of the roof is more than that of the cylindrical shell
D. Irrespective of its diameter
A. Sieve
B. Valve
C. Counter flow
D. Bubble cap