MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which type of nozzle does the following picture represent? |
| A. | Convergent |
| B. | Divergent |
| C. | Convergent-Divergent |
| D. | Subsonic |
| Answer» C. Convergent-Divergent | |
| 2. |
The smallest section of a steam nozzle is called _____ |
| A. | maw |
| B. | neck |
| C. | throat |
| D. | muzzle |
| Answer» D. muzzle | |
| 3. |
Which of the following statements about steam nozzles is FALSE? |
| A. | It converts the heat energy of the steam into kinetic energy |
| B. | It has a varying cross section |
| C. | The smallest section is called throat |
| D. | The pressure at the outlet is more than at the inlet |
| Answer» E. | |
| 4. |
A steam nozzle is a passage of varying cross section through which the kinetic energy of steam is converted into heat energy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
If there are N shell passes in a shell and tube HE, then which one of the following relation is correct foe the pressure drop a shell side? |
| A. | \((\frac{FL}{D}+4×N)\frac{v^2ρ}{2}\) |
| B. | \((\frac{FL}{D}+N)\frac{v^2ρ}{2}\) |
| C. | \((\frac{4FL}{D}+N)\frac{v^2ρ}{2}\) |
| D. | \((\frac{4FL}{D}+4×N)\frac{v^2ρ}{2}\) |
| Answer» B. \((\frac{FL}{D}+N)\frac{v^2ρ}{2}\) | |
| 6. |
Consider we have a shell and tube Heat Exchanger, with the inner tube of diameter 30mm (neglect thickness) and shell of diameter 100mm. We have two fluids A & B (both with viscosity 2.5×10-5Pa-s), we desire to have their flow rates as 4 Kg/s(tube) and 5.3 Kg/s(shell) respectively. What is the Friction Factor (F) for this setup for the shell if it has triangular pitch with Pitch = 40mm? |
| A. | 0.0086 |
| B. | 0.0103 |
| C. | 0.086 |
| D. | 0.00103 |
| E. | and 5.3 Kg/s(shell) respectively. What is the Friction Factor (F) for this setup for the shell if it has triangular pitch with Pitch = 40mm?a) 0.0086b) 0.0103c) 0.086d) 0.00103 |
| Answer» C. 0.086 | |
| 7. |
In the calculation of Reynold’s Number for the Friction factor of the shell, which is the correct formula for equivalent diameter De? |
| A. | \(\frac{4×(D_{oi}^2 – D_{io}^2)×\frac{π}{4}}{π(D_{io})}\) |
| B. | \(\frac{4×(D_{io}^2 – D_{oi}^2)×\frac{π}{4}}{π(D_{io})}\) |
| C. | Depends on the pitch |
| D. | \(\frac{4×(D_{io}^2 – D_{oi}^2)×\frac{π}{4}}{π(D_{io}+D_{oi})}\) |
| Answer» D. \(\frac{4×(D_{io}^2 – D_{oi}^2)×\frac{π}{4}}{π(D_{io}+D_{oi})}\) | |
| 8. |
Consider we have a 2-4Shell and Tube Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and shell of inner diameter 100mm. We have two fluids A & B, both of density 990 Kg/m3, we desire to have their flow rates as 15 m/s and 21 m/s respectively, friction factor of 0.00096 and 4 tube of length 0.4 m and 2shell passes. If the maximum pressure drop allowed on shell side is 10atm, is the setup suitable for industrial use? |
| A. | No, since pressure drop is less than specified |
| B. | Yes, since pressure drop is less than specified |
| C. | No, since pressure drop is more than specified |
| D. | Yes, since pressure drop is more than specified |
| Answer» D. Yes, since pressure drop is more than specified | |
| 9. |
What is the Pressure drop equivalent for 7 tube passes? |
| A. | 50ρ \(\frac{v^2}{2}\) |
| B. | 28ρ \(\frac{v^2}{2}\) |
| C. | 20\(\frac{v^2}{2}\) |
| D. | 7\(\frac{v^2}{2}\) |
| Answer» C. 20\(\frac{v^2}{2}\) | |
| 10. |
Consider we have a 2-4 Shell and Tube Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and Shell of inner diameter 100mm. We have two fluids A & B, both of density 990 Kg/m3, we desire to have their flow rates as 15 m/s(tube) and 21 m/s(shell) respectively, friction factor of 0.00096 and 2 tubes of length 0.4 m. What is the value of Pressure drop for the inner tube due to frictional losses? |
| A. | 10.67KPa |
| B. | 20KPa |
| C. | 25KPa |
| D. | 24KPa |
| E. | and 21 m/s(shell) respectively, friction factor of 0.00096 and 2 tubes of length 0.4 m. What is the value of Pressure drop for the inner tube due to frictional losses?a) 10.67KPab) 20KPac) 25KPad) 24KPa |
| Answer» B. 20KPa | |
| 11. |
Consider we have a 2-4 Shell and Tube Heat Exchanger, with the inner tube of Outer diameter 20mm (thickness 2mm) and shell of inner diameter 100mm. We have two fluids A & B, both of density 990 Kg/m3, we desire to have their flow rates as 15m/s(tube) and 21 m/s(shell) respectively, friction factor of 0.00096 and length of the tube as 1m. What is the value of Frictional Head Loss for the inner tube? |
| A. | 24.6 m |
| B. | 27.6 m |
| C. | 2.76 m |
| D. | 2.46 m |
| E. | and 21 m/s(shell) respectively, friction factor of 0.00096 and length of the tube as 1m. What is the value of Frictional Head Loss for the inner tube?a) 24.6 mb) 27.6 mc) 2.76 md) 2.46 m |
| Answer» D. 2.46 m | |
| 12. |
For the calculation of Friction Factor on the Shell side, which one of the following is the correct formula? |
| A. | F = 0.0035+ \(\frac{0.264}{Re^{0.42}} \) |
| B. | F = 0.0027+ \(\frac{0.264}{Re^{0.42}} \) |
| C. | F = 0.0035+ \(\frac{0.42}{Re^{0.264}} \) |
| D. | F = 0.0027+ \(\frac{0.42}{Re^{0.264}} \) |
| Answer» B. F = 0.0027+ \(\frac{0.264}{Re^{0.42}} \) | |
| 13. |
If we desire to use a fluid with high pressure operation, we prefer to keep it in the tube side. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
We have a fluid of dirt factor 0.00035 which we want to use in our operation. During design calculations we find the dirt factor to be less than that of the fluid, we pass the setup for industrial use. |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
We have a fluid of dirt factor 0.0035 which we want to use in our operation. Then during design considerations, we find that for our design the dirt factor is not applicable, this value of the dirt factor can be ________ |
| A. | 0.00035 |
| B. | 0.0035 |
| C. | 0.0045 |
| D. | 0.0055 |
| Answer» B. 0.0035 | |
| 16. |
Our design dirt factor should be _____ the provided threshold dirt factor. |
| A. | Less than |
| B. | More than |
| C. | Equal to |
| D. | Much less than |
| Answer» C. Equal to | |
| 17. |
If UD = Overall Dirt Heat Transfer coefficient and Uc = Overall Clean Heat Transfer coefficient, then which of the following relation is correct? |
| A. | UD > Uc |
| B. | UD < Uc |
| C. | UD = Uc |
| D. | UD >> Uc |
| Answer» C. UD = Uc | |
| 18. |
Shell and tube HE as well as baffle designs are made by strictly following the standards of______ |
| A. | TERA |
| B. | AESA |
| C. | TEMA |
| D. | AISA |
| Answer» D. AISA | |
| 19. |
If we desire to have 5 shell passes for a shell of length 40cm, what is the baffle spacing in the shell side? |
| A. | 8cm |
| B. | 7cm |
| C. | 6cm |
| D. | 5cm |
| Answer» B. 7cm | |
| 20. |
The number of possible baffles classification are______ |
| A. | Doughnut and disc baffles |
| B. | Orifice and disc baffles |
| C. | Segmental, Doughnut and Orifice baffles |
| D. | Segmental, Doughnut and shell baffles |
| Answer» D. Segmental, Doughnut and shell baffles | |
| 21. |
Recognize the following baffle arrangement |
| A. | Double Segmental |
| B. | Triple Segmental |
| C. | Segmental |
| D. | Doughnut Segment |
| Answer» C. Segmental | |
| 22. |
Doughnut shaped baffles are one of the commonly used baffles in the industry. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 23. |
What is the correct expression for the number of passes in shell side of a shell and tube HE? |
| A. | L/B |
| B. | L/B – 1 |
| C. | L/B + 1 |
| D. | B/L |
| Answer» B. L/B – 1 | |
| 24. |
What is the number of baffles in the shell side if the baffle spacing is 6cm and Length of the setup is 90cm? |
| A. | 15 |
| B. | 12 |
| C. | 14 |
| D. | 16 |
| Answer» D. 16 | |
| 25. |
Recognise the below baffle arrangement. |
| A. | Double Segmental |
| B. | Triple Segmental |
| C. | Segmental |
| D. | Doughnut Segment |
| Answer» B. Triple Segmental | |
| 26. |
Why do we provide baffles? Choose the option that is incorrect. |
| A. | To support the tubes |
| B. | To increase turbulence in the shell side |
| C. | Sometimes behave as fins |
| D. | Increases Heat transfer Coefficient |
| Answer» D. Increases Heat transfer Coefficient | |
| 27. |
What are the ways can tubes be arranged in a shell and tube HE? |
| A. | Half parallel flow arrangement & Semi parallel flow arrangement |
| B. | Hairpin arrangement & Full parallel flow arrangement |
| C. | Full parallel flow arrangement & Half parallel flow arrangement |
| D. | Hairpin arrangement & Half parallel flow arrangement |
| Answer» C. Full parallel flow arrangement & Half parallel flow arrangement | |
| 28. |
If the Heat Transfer area for a Shell and tube heat exchanger is 15100mm2, and the radius of the tubes is 30mm, then what is the number of hairpins required if its single pass length is 4cm? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 29. |
If the Heat Transfer area for a Shell and tube heat exchanger is 15000mm2, and the radius of the tubes is 30mm, then what is the length of the tubes required? |
| A. | 16cm |
| B. | 15.9cm |
| C. | 13cm |
| D. | 15cm |
| Answer» C. 13cm | |
| 30. |
In a shell and tube heat exchanger, the heat transfer area is maximum for ________ |
| A. | Concurrent |
| B. | Counter current |
| C. | Concurrent at a part and Counter current at the other |
| D. | Mixed flow |
| Answer» B. Counter current | |
| 31. |
Loamy, mild or sandy clay has __________ percentage of alkali? |
| A. | 5% |
| B. | 1% |
| C. | 4% |
| D. | 0% |
| Answer» E. | |
| 32. |
How many types of the brick earth are there? |
| A. | 3 |
| B. | 5 |
| C. | 2 |
| D. | 6 |
| Answer» B. 5 | |
| 33. |
Carbonaceous material in small amounts is good for the brick earth. |
| A. | True |
| B. | False |
| Answer» C. | |
| 34. |
The presence of which of the below renders clay totally unsuitable for brick manufacture? |
| A. | Kallar |
| B. | Kankar |
| C. | Hay |
| D. | Lime |
| Answer» B. Kankar | |
| 35. |
How many constituents are there in the brick earth? |
| A. | 5 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» B. 4 | |
| 36. |
Which of the following is called as a ventilated discharge pipe? |
| A. | Branch sewer pipe |
| B. | Soil vent pipe |
| C. | Outfall sewer pipe |
| D. | Main sewer pipe |
| Answer» C. Outfall sewer pipe | |
| 37. |
_______ is used to remove the waste directly from the building. |
| A. | Branch sewer pipe |
| B. | Outfall sewer pipe |
| C. | Soil vent pipe |
| D. | Main sewer pipe |
| Answer» D. Main sewer pipe | |
| 38. |
Ventilating columns are provided at intervals of ______ along the sewer lines. |
| A. | 30m |
| B. | 50m |
| C. | 100m |
| D. | 150m |
| Answer» E. | |
| 39. |
The diameter of the sewer is _____ the diameter of ventilating column. |
| A. | Equal to |
| B. | 2 times |
| C. | 3 times |
| D. | 4 times |
| Answer» D. 4 times | |
| 40. |
_______ columns are used for the ventilation of sewer. |
| A. | Aeration columns |
| B. | Inclined columns |
| C. | Ventilating columns |
| D. | Vertical columns |
| Answer» D. Vertical columns | |
| 41. |
Semi elliptical sections of sewer are not used nowadays. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 42. |
The type of joint used for metallic sewer is __________ |
| A. | Collar joint |
| B. | Flexible joint |
| C. | Mechanical joint |
| D. | Simplex joint |
| Answer» D. Simplex joint | |
| 43. |
The ratio of cement mortar used in the Collar joint is? |
| A. | 1:2 |
| B. | 1:6 |
| C. | 2:1 |
| D. | 1:1 |
| Answer» B. 1:6 | |
| 44. |
The ratio of cement mortar used in Bell and spigot joint is? |
| A. | 1:1 |
| B. | 1:6 |
| C. | 2:1 |
| D. | 1:3 |
| Answer» B. 1:6 | |
| 45. |
How many types of joints are present in the sewer? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 46. |
The active site of the topoisomerase contains a tyrosine residue. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 47. |
Which of the following does not occur during cell division in prokaryotes? |
| A. | Multiple decatenations |
| B. | DNA cleavage |
| C. | DNA rejoining |
| D. | Strand passage |
| Answer» B. DNA cleavage | |
| 48. |
Topoisomerases I and II differ only on the number of steps required to change the linking number. |
| A. | True |
| B. | False |
| Answer» C. | |
| 49. |
What is the purpose of the advanced mode in the Closure compiler? |
| A. | Removing the variables and other parameters |
| B. | Renaming the variables and other parameters |
| C. | Slight alteration to improve the runtime performance |
| D. | Calls the function |
| Answer» C. Slight alteration to improve the runtime performance | |
| 50. |
In how many modes can the Closure compiler be run? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |