- (A) 0.5 d
- (B) d
- (C) 1.5 d
- (D) 2.5 d
Exam preparation MCQs with answers
Practice Pakistan's most useful MCQs for competitive exams
Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.
Latest MCQs
- (A) Preferably flow inside the tube for its easier internal cleaning
- (B) Preferably flow outside the tube
- (C) Flow at a very slow velocity
- (D) Flow outside the tube, when the flow is counter-current and inside the tube when the flow is co-current
- (A) Density of the gas, but is independent of the viscosity of the gas
- (B) Density of the gas and inversely as viscosity of the gas
- (C) Viscosity of the gas and inversely as density of the gas
- (D) None of these
- (A) Are easier to clean
- (B) Are less prone to fouling
- (C) Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
- (D) None of these
- (A) Tube dia of 2.5-7.5 cms, tube length of 75-200 cms and cylindrical drum dia of 1-6 metres are normally used
- (B) Area of central downtake is equal to 40 to 100% of total cross-sectional area of the surrounding tube
- (C) Liquor is inside the tube while the steam is outside the tube
- (D) All
- (A) 19
- (B) 38
- (C) 67
- (D) 95
- (A) From rolled strips formed into cylinders and seam-welded
- (B) By extrusion & casting into static and centrifugal molds
- (C) By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing
- (D) Both
- (A) d1/(d1 + d2)
- (B) d2/(d1 + d2)
- (C) (d1 + d2)/d1
- (D) (d1 + d2)/d2
- (A) Viscosity of the fluid
- (B) Density of the fluid
- (C) Total cost considerations (pumping cost plus fixed cost of the pipe)
- (D) None of these
- (A) 0.25
- (B) 0.50
- (C) 0.75
- (D) 1.25
