MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 32 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A mould has a down sprue length of 0.2 meters. The velocity of metal in meter/second at gate will be? |
| A. | 1.78 |
| B. | 1.98 |
| C. | 2.3 |
| D. | 2.5 |
| Answer» C. 2.3 | |
| 2. |
Time required to fill the mould by vertical gating system is? |
| A. | Less to bottom gating system |
| B. | More to bottom gating system |
| C. | Equal to bottom gating system |
| D. | Sometimes more and sometimes less to bottom gating system |
| Answer» B. More to bottom gating system | |
| 3. |
If the volume to surface area ratio is 2 for riser and for casting it is 4, then the freezing ratio is? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | .5 |
| Answer» E. | |
| 4. |
If velocity of metal flow at gate is 4m/sec, volume of mould is .1 cubic meters and the cross-sectional area of gate is 0.002 cubic meters then the time required to fill up the mould in seconds is? |
| A. | 10 |
| B. | 12 |
| C. | 12.5 |
| D. | 15.5 |
| Answer» D. 15.5 | |
| 5. |
Which of the following is not a type of riser? |
| A. | Top riser |
| B. | Open riser |
| C. | Internal riser |
| D. | Bottom riser |
| Answer» E. | |
| 6. |
In the gate area for non-pressurized casting gating ratio a:b:c? (gating ratio = a: b: c where, a = cross-sectional area of sprue, b: cross-sectional area of runner, c = total cross-sectional area of ingates). |
| A. | 1:2:2 |
| B. | 2:2:1 |
| C. | 1:4:4 |
| D. | 1:4:2 |
| Answer» D. 1:4:2 | |
| 7. |
In which type of gating system aspiration effect takes place? |
| A. | Vertical |
| B. | Horizontal |
| C. | Diagonal |
| D. | Bottom |
| Answer» B. Horizontal | |
| 8. |
Why large or complex castings require multiple in-gates? |
| A. | To make smooth surface finish of the casting |
| B. | To make uniform flow |
| C. | To have high strength of the casting |
| D. | To have good toughness of the casting |
| Answer» C. To have high strength of the casting | |
| 9. |
What is the ratio of width to the depth of in-gates in general? |
| A. | 1:2 |
| B. | 1:1 |
| C. | 4:1 |
| D. | 2:7 |
| Answer» D. 2:7 | |
| 10. |
Smallest in-gate area in the pressurized gating system causes_____ |
| A. | turbulency |
| B. | low velocity |
| C. | low viscosity |
| D. | smooth running of molten metal |
| Answer» B. low velocity | |
| 11. |
Casting yield of a non-pressurized gating system is _____ |
| A. | very high |
| B. | 80% |
| C. | very less |
| D. | 50% |
| Answer» D. 50% | |
| 12. |
TIME_REQUIRED_TO_FILL_THE_MOULD_BY_VERTICAL_GATING_SYSTEM_IS________TO_BOTTOM_GATING_SYSTEM??$ |
| A. | Less |
| B. | More |
| C. | Equal |
| D. | None of the Mentioned |
| Answer» B. More | |
| 13. |
CASTING_YIELD_OF_A_NON-PRESSURIZED_GATING_SYSTEM_IS______?$ |
| A. | very high |
| B. | 80% |
| C. | very less |
| D. | 50% |
| Answer» D. 50% | |
| 14. |
What is the ratio of width to the depth of in-gates in general?$ |
| A. | 1:2 |
| B. | 1:1 |
| C. | 4:1 |
| D. | 2:7 |
| Answer» D. 2:7 | |
| 15. |
A_mould_has_a_down_sprue_length_of_.2_meters._The_velocity_of_metal_in_meter/second_at_gate_will_be?$ |
| A. | 1.78 |
| B. | 1.98 |
| C. | 2.3 |
| D. | 2.5 |
| Answer» C. 2.3 | |
| 16. |
Smallest_in-gate_area_in_the_pressurized_gating_system_causes_____$ |
| A. | turbulency |
| B. | low velocity |
| C. | low viscosity |
| D. | smooth running of molten metal |
| Answer» B. low velocity | |
| 17. |
Why_large_or_complex_castings_require_multiple_in-gates? |
| A. | To make smooth surface finish of the casting |
| B. | To make uniform flow |
| C. | To have high strength of the casting |
| D. | To have good toughness of the casting |
| Answer» C. To have high strength of the casting | |
| 18. |
If the volume is to area ratio for riser is 2 and for casting it is 4 then the freezing ratio is? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | .5 |
| Answer» E. | |
| 19. |
Which of the following gating systems is useful for casting drossy alloys? |
| A. | Pressurized gating system |
| B. | Partially pressurized gating system |
| C. | High pressurized gating system |
| D. | Non-pressurized gating system |
| Answer» E. | |
| 20. |
If velocity of metal flow at gate is 4m/sec, volume of mould is .1 cubic meters and the cross sectional area of gate is 0.002 cubic meters then the time required to fill up the mould in seconds is? |
| A. | 10 |
| B. | 12 |
| C. | 12.5 |
| D. | 15.5 |
| Answer» D. 15.5 | |
| 21. |
Which of the following is the purpose of runner extension? |
| A. | To make smooth surface finish |
| B. | To make the casting of specific size and shape |
| C. | To remove slag and dross from the metal |
| D. | To make fast cooling of molten metal |
| Answer» D. To make fast cooling of molten metal | |
| 22. |
To reduce the eroding force of the liquid metal which of the following system is used? |
| A. | Skim bob |
| B. | Pouring basin |
| C. | Strainer |
| D. | Riser |
| Answer» C. Strainer | |
| 23. |
Which of the following materials require a longer pouring time? |
| A. | Non-ferrous material |
| B. | Grey cast iron |
| C. | Ferrous alloys |
| D. | Brass |
| Answer» B. Grey cast iron | |
| 24. |
To prevent heavier and lighter impurities which of the following system is used? |
| A. | Skim bob |
| B. | Pouring basin |
| C. | Strainer |
| D. | Splash core |
| Answer» B. Pouring basin | |
| 25. |
Which of the following methods is used for trapping the slag from entering steel casting into the mould? |
| A. | Finn’s method |
| B. | Down gate method |
| C. | Whirl gate method |
| D. | Euler’s method |
| Answer» D. Euler‚Äö√Ñ√∂‚àö√ë‚àö¬•s method | |
| 26. |
Caine curve is a graph between? |
| A. | Volume ratio and Solidification ratio |
| B. | Volume ratio to freezing ratio |
| C. | Volume ratio to heating ratio |
| D. | Freezing ratio to time ratio |
| Answer» C. Volume ratio to heating ratio | |
| 27. |
Which of the followings is the formula for calculating the choke area (A)? |
| A. | 2W/dtC‚àö2gh |
| B. | W/dtC‚àö2gh |
| C. | W²/dtC√2gh |
| D. | 2W³/dtC√2gh |
| Answer» C. W¬¨¬®‚Äö√¢¬ß/dtC‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2gh | |
| 28. |
Which of the following is a type of riser? |
| A. | Top |
| B. | Blind |
| C. | Internal |
| D. | All of the Mentioned |
| Answer» E. | |
| 29. |
What will be the optimum pouring time for cast iron whose mass is 100 kg and a thickness of 25 mm? Fluidity of iron is 32 inches? |
| A. | 24.98 |
| B. | 18.2 |
| C. | 31.32 |
| D. | 14.8 |
| Answer» B. 18.2 | |
| 30. |
The gating ratio Sprue area: Runner area: In the gate area for non pressurized casting is? |
| A. | 1:2:2 |
| B. | 2:2:1 |
| C. | 1:4:4 |
| D. | 1:4:2 |
| Answer» D. 1:4:2 | |
| 31. |
Which of the following flows is responsible for too less pouring time of molten metal in the mould? |
| A. | Laminar flow |
| B. | Viscous flow |
| C. | Turbulent flow |
| D. | Irrotational flow |
| Answer» D. Irrotational flow | |
| 32. |
The liquid metal that runs through the channels without friction in the mould obeys which of the following theorem? |
| A. | Bernoulli’s theorem |
| B. | Clausius theorem |
| C. | Helmholtz’s theorem |
| D. | Carnot’s theorem |
| Answer» B. Clausius theorem | |