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 of the following has better machinability as compared to the remaining? |
| A. | Low carbon steels |
| B. | Zinc alloys |
| C. | Parting off |
| D. | Gun metal |
| E. | Wrought iron |
| Answer» C. Parting off | |
| 2. |
Which one of the following methods cannot be used for producing external threads? |
| A. | By tap |
| B. | By dies |
| C. | Vernier caliper |
| D. | By rolling |
| E. | One lathe |
| Answer» B. By dies | |
| 3. |
In metal cutting operations continuous chips are produced while machining |
| A. | Brittle materials |
| B. | Ductile materials |
| C. | Hard materials |
| D. | Soft materials |
| E. | None of the above |
| Answer» C. Hard materials | |
| 4. |
Which of the following is an accessory for lathe? |
| A. | Head stock |
| B. | Lead screw |
| C. | Steady rest |
| D. | Tool post |
| E. | Tail stock |
| Answer» D. Tool post | |
| 5. |
Drilling speed in aluminium nearly |
| A. | 35 to 50 m/min |
| B. | 10 to 25 m/min |
| C. | 60 to 75 m/min |
| D. | 3 to 5 m/min |
| E. | 80 to 100 m/min |
| Answer» B. 10 to 25 m/min | |
| 6. |
A flatter is made of |
| A. | Parting off |
| B. | High speed steel |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» F. | |
| 7. |
The averge cutting speed for machining mild steel by high speed steel tool is |
| A. | 30 m/min |
| B. | 50 m/min |
| C. | 20 m/min |
| D. | 10 m/min |
| E. | 40 m/min |
| Answer» B. 50 m/min | |
| 8. |
If a drill does not cut; the probable cause would be |
| A. | Drill blunt |
| B. | Material difficult to drill |
| C. | Speed low |
| D. | Absence of coolant |
| E. | None of the above |
| Answer» B. Material difficult to drill | |
| 9. |
Choose the incorrect statement. Good machinability results in |
| A. | Low components cost |
| B. | Moderate cuttng forces |
| C. | Smaller chips |
| D. | All of the above |
| E. | A process of removing carbon from metals |
| Answer» B. Moderate cuttng forces | |
| 10. |
The size of a lathe is expressed by |
| A. | Height of centres from ground |
| B. | Swing of lathe |
| C. | Maximum speed of chuck |
| D. | Gross weight of lathe |
| E. | Diameter of chuck |
| Answer» C. Maximum speed of chuck | |
| 11. |
The main advantage of using synthetic sand in foundry is |
| A. | It does not require moisture |
| B. | It is less costly |
| C. | Its properties can be easily controlled |
| D. | It is highly refractory |
| E. | It can take any shape |
| Answer» D. It is highly refractory | |
| 12. |
The diameter of a round bar with close tolerances is quickly measured by |
| A. | Slip gauges |
| B. | External micrometer |
| C. | Vernier caliper |
| D. | Snap gauge |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 13. |
Which of the following defect in castings may develop due to inadequate venting? |
| A. | Misruns |
| B. | Blow holes |
| C. | Cold shuts |
| D. | Parting off |
| E. | Inclusions |
| Answer» C. Cold shuts | |
| 14. |
The riser in a mould should be located in such a way so that |
| A. | it touches all parts of the casting |
| B. | it is first to receive the molten metal |
| C. | Parting off |
| D. | it is last to solidify |
| E. | it is first to solidify |
| Answer» E. it is first to solidify | |
| 15. |
Specific temperature for the international Prototype metre is |
| A. | Atmospheric |
| B. | Melting point of ice |
| C. | 0?F |
| D. | 0?K |
| E. | 0?C |
| Answer» F. | |
| 16. |
All mechanical seals have two flat sealing surfaces |
| A. | At right angles to the axis of rotation |
| B. | Parallel to the axis of rotation |
| C. | Parallel to the end plate |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Parallel to the axis of rotation | |
| 17. |
Which of the following process needs high voltage for its operation? |
| A. | Plasma arc machining |
| B. | Ultrasonic machining |
| C. | Abrasive jet machining |
| D. | Electro chemical machining |
| E. | Electron beam machining |
| Answer» F. | |
| 18. |
During ultrasonic machining the metal removal is effected by |
| A. | High frequency sound waves |
| B. | High frequency eddy currents |
| C. | Rubbing action between tool and work piece |
| D. | Hammering action of abrasive particles |
| E. | All of the above |
| Answer» E. All of the above | |
| 19. |
Which of the following metal takes smallest side rake angle during turning? |
| A. | Cast iron |
| B. | Parting off |
| C. | Brass |
| D. | Monel metal |
| E. | Aluminium |
| Answer» D. Monel metal | |
| 20. |
The passage way of bringing the molten metal to the mould cavity is known as |
| A. | Entry system |
| B. | Loading system |
| C. | Delivery system |
| D. | Gating system |
| E. | Piping system |
| Answer» E. Piping system | |
| 21. |
The pouring temperature for grey cast iron is |
| A. | 2350?C |
| B. | 1655?C |
| C. | 1850?C |
| D. | 1400?C |
| E. | 1000?C |
| Answer» E. 1000?C | |
| 22. |
During oxyacetylene flame cutting, the metal is cut due to |
| A. | Reduction process |
| B. | Molecular transfer |
| C. | Intensive oxidation |
| D. | Evaporation of metal |
| E. | Burning of metal |
| Answer» D. Evaporation of metal | |
| 23. |
Which of the following defect results due to mixing of two streams of molten metal that are too cold to fuse properly? |
| A. | Cold shut |
| B. | Swell |
| C. | Honey coming |
| D. | Scab |
| E. | Shrinkage |
| Answer» B. Swell | |
| 24. |
Which of the following defect in castings is caused by the molten metal? |
| A. | Scab |
| B. | Swell |
| C. | Shrinkage |
| D. | Blowholes |
| E. | All of the above |
| Answer» C. Shrinkage | |
| 25. |
During continuous chip formation the maximum heat is taken away by |
| A. | Depends on velocity of cutting |
| B. | Chip |
| C. | Tool |
| D. | Work piece |
| E. | Coolant |
| Answer» B. Chip | |
| 26. |
In which type of welding molten metal is poured for joining the metals |
| A. | Gas welding |
| B. | Arc welding |
| C. | MIG |
| D. | Thermit welding |
| E. | TIG |
| Answer» E. TIG | |
| 27. |
Which of the following process will be preferred for joining thin foils? |
| A. | Thermit welding |
| B. | Gas welding |
| C. | MIG welding |
| D. | DC arc welding |
| E. | Plasma arc welding |
| Answer» F. | |
| 28. |
Scale sensitivity is defined as |
| A. | Ratio of a change in scale reading to the corresponding change in pointer deflection |
| B. | Least reading of scale/range of scale |
| C. | Least reading of scale/unit measurable quantity |
| D. | Least count of scale/range of scale |
| E. | None of the above |
| Answer» B. Least reading of scale/range of scale | |
| 29. |
Surface finish of a casting is affected by |
| A. | fineness of sand |
| B. | pattern finish |
| C. | mould dressings |
| D. | All of the above |
| E. | Parting off |
| Answer» E. Parting off | |
| 30. |
The coolant generally used while machining with carbide tools is |
| A. | Water |
| B. | Compressed air |
| C. | Graphite |
| D. | Kerosene |
| E. | Soluble oil |
| Answer» F. | |
| 31. |
In order to lower the cutting forces and also to decrease the cutting wear, alloying element generally added to steel for free machining is |
| A. | Lead |
| B. | Chromium |
| C. | Manganese |
| D. | Sulphur |
| E. | Aluminium |
| Answer» B. Chromium | |
| 32. |
While machining copper alloys by electro chemical machining the electrolyte used is |
| A. | Sodium chlorate |
| B. | Sodium hydroxide |
| C. | Sodium sulphate |
| D. | Common salt |
| E. | Sodium nitrate |
| Answer» D. Common salt | |
| 33. |
Two 20 mm thick plates are to be gas welded. What size of welding rod should be selected out of the following rods available? |
| A. | 6 mm |
| B. | 4.5 mm |
| C. | 1.5 mm |
| D. | 8 mm |
| E. | 3 mm |
| Answer» B. 4.5 mm | |
| 34. |
Chips with built up edge are produced while machining |
| A. | Non-ferrous materials |
| B. | Cast materials |
| C. | Hard materials |
| D. | Brittle material |
| E. | Ductile material |
| Answer» F. | |
| 35. |
The surface finish obtainable in abrasive jet machining is of the order of |
| A. | 0.5 to 1.2 |
| B. | 20 to 50 |
| C. | 12 to 20 |
| D. | 2 to 5 |
| E. | 50 to 100 |
| Answer» B. 20 to 50 | |
| 36. |
The gases used in tungsten inert gas welding are |
| A. | Argon and helium |
| B. | Helium and neon |
| C. | Ozone and neon |
| D. | Atomic hydrogen and neon |
| E. | Carbonsioxide and nitrogen |
| Answer» B. Helium and neon | |
| 37. |
In gas welding the maximum flame temperature occurs at |
| A. | Inside the inner cone |
| B. | The inner cone |
| C. | Next to the inner cone |
| D. | The outer cone |
| E. | The tip of the flame |
| Answer» D. The outer cone | |
| 38. |
For the measurement of pressure of liquids at high temperature using pressure gauge |
| A. | Gauge is heated to the temperature to be measured |
| B. | Necessary thermodynamic calculations are made |
| C. | Necessary correction factory is applied |
| D. | A siphon filled with liquid is used to protect the Bourdon tube |
| E. | Pressure gauge is never used in such cases |
| Answer» E. Pressure gauge is never used in such cases | |
| 39. |
Poor surface finish and fast wear of tool are the characteristics of |
| A. | Continuous chips with built up edges |
| B. | Discontinuous chips |
| C. | Inhomogencous chips |
| D. | Low power consumption |
| E. | Continuous chips |
| Answer» B. Discontinuous chips | |
| 40. |
The chemical used in generating acetylene is |
| A. | Charcoal |
| B. | Calcium carbonate |
| C. | Calcium carbide |
| D. | Carbon |
| E. | Crushed bone |
| Answer» F. | |
| 41. |
In a centre lathe gear box for changing spindle speeds the provision for speeds is made in |
| A. | Arithmetical progression |
| B. | Geometrical progression |
| C. | Cubical progression |
| D. | Random members |
| E. | Square progression |
| Answer» C. Cubical progression | |
| 42. |
The mallets used in sheet metal shop are made from |
| A. | Parting off |
| B. | Cast iron |
| C. | Wood, fiber |
| D. | Mild steel |
| Answer» E. | |
| 43. |
International Prototype Meter is made of |
| A. | Copper |
| B. | Mild steel |
| C. | Cast iron |
| D. | Copper-nickel alloy |
| E. | Platinum-iridium alloy |
| Answer» F. | |
| 44. |
A piercing operation in which the entire contour is not cut, is known as |
| A. | lancing |
| B. | Parting off |
| C. | notching |
| D. | broaching |
| E. | bumishing |
| Answer» B. Parting off | |
| 45. |
A job made by forging is |
| A. | Parting off |
| B. | Weaker than a job made by casting or machining |
| C. | Stronger than a job made by casting or machining |
| Answer» F. | |
| 46. |
High carbon steels contain carbon |
| A. | Between 0.6 to 1.3 percent |
| B. | Between 0.05 to 0.6 percent |
| C. | More than 1.7 percent |
| D. | Between 1.3 to 1.7 percent |
| E. | 0.70 percent |
| Answer» B. Between 0.05 to 0.6 percent | |
| 47. |
Which of the following is not a fine finishing operation? |
| A. | Grinding |
| B. | Honing |
| C. | Buffing |
| D. | Lapping |
| E. | Tumbling |
| Answer» F. | |
| 48. |
Slip gauges are made of |
| A. | Aluminium |
| B. | Copper |
| C. | Alloy steel |
| D. | Stainless steel |
| E. | Cast iron |
| Answer» D. Stainless steel | |
| 49. |
Steam condenser tubes are generally made of |
| A. | Brass |
| B. | Bronze |
| C. | Bell metal |
| D. | Admiralty alloy |
| E. | Babbit metal |
| Answer» E. Babbit metal | |
| 50. |
Balometers are used for the measurement of |
| A. | Temperature input |
| B. | Thermal radiation |
| C. | Electrical input |
| D. | Optical input |
| E. | Pneumatic input |
| Answer» C. Electrical input | |