MCQOPTIONS
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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The percentage of carbon in cast iron varies from |
| A. | 0.1 to 0.5 |
| B. | 0.5 to 1 |
| C. | 1 to 1.7 |
| D. | 1.7 to 4.5 |
| Answer» E. | |
| 2. |
A material is said to be allotropic, if it has |
| A. | fixed structure at all temperatures |
| B. | atoms distributed in random pattern |
| C. | different crystal structures at different temperatures |
| D. | any one of the above |
| Answer» D. any one of the above | |
| 3. |
Closed packed hexagonal space lattice is found in |
| A. | zinc, magnesium, cobalt, cadmium, antimony and bismuth |
| B. | gamma-iron, aluminium, copper, lead, silver and nickel |
| C. | alpha-iron, tungsten, chromium and molybdenum |
| D. | none of the above |
| Answer» B. gamma-iron, aluminium, copper, lead, silver and nickel | |
| 4. |
Cast iron is a |
| A. | ductile material |
| B. | malleable material |
| C. | brittle material |
| D. | tough material |
| Answer» D. tough material | |
| 5. |
The ability of a material to absorb energy in the plastic range is called |
| A. | resilience |
| B. | creep |
| C. | fatigue strength |
| D. | toughness |
| Answer» E. | |
| 6. |
The hardness and tensile strength in austenitic stainless steel can be increased by |
| A. | hardening and cold working |
| B. | normalising |
| C. | martempering |
| D. | full annealing |
| Answer» B. normalising | |
| 7. |
Smelting is the process of |
| A. | removing the impurities like clay, sand etc. from the iron ore by washing with water |
| B. | expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns |
| C. | reducing the ore with carbon in the presence of a flux |
| D. | all of the above |
| Answer» D. all of the above | |
| 8. |
The hardness is the property of a material due to which it |
| A. | can be drawn into wires |
| B. | breaks with little permanent distortion |
| C. | can cut another metal |
| D. | can be rolled or hammered into thin sheets |
| Answer» D. can be rolled or hammered into thin sheets | |
| 9. |
Malleable cast iron is produced |
| A. | by adding magnesium to molten cast iron |
| B. | by quick cooling of molten cast iron |
| C. | from white cast iron by annealing process |
| D. | none of these |
| Answer» D. none of these | |
| 10. |
The number of slots in a 25 mm castle nut is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 11. |
In a flange coupling, the flanges are coupled together by means of |
| A. | bolts and nuts |
| B. | studs |
| C. | headless taper bolts |
| D. | none of these |
| Answer» B. studs | |
| 12. |
Specify the sequence correctly |
| A. | Grain growth, recrystallisation, stress relief |
| B. | Stress relief, grain growth, recrystallisation |
| C. | Stress relief, recrystallisation, grain growth |
| D. | Grain growth, stress relief, recrystallisation |
| Answer» D. Grain growth, stress relief, recrystallisation | |
| 13. |
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material. |
| A. | elastic strength |
| B. | yield strength |
| C. | shear strength |
| Answer» C. shear strength | |
| 14. |
A transmission shaft includes |
| A. | counter shaft |
| B. | line shaft |
| C. | over head shaft |
| D. | all of these |
| Answer» E. | |
| 15. |
Thermoplastic materials are those materials which |
| A. | are formed into shape under heat and pressure and results in a permanently hard product |
| B. | do not become hard with the application of heat and pressure and no chemical change occurs |
| C. | are flexible and can withstand considerable wear under suitable conditions |
| D. | are used as a friction lining for clutches and brakes |
| Answer» C. are flexible and can withstand considerable wear under suitable conditions | |
| 16. |
Which of the following material has maximum ductility? |
| A. | Mild steel |
| B. | Copper |
| C. | Nickel |
| D. | Aluminium |
| Answer» B. Copper | |
| 17. |
An eutectoid steel consists of |
| A. | wholly pearlite |
| B. | wholly austenite |
| C. | pearlite and ferrite |
| D. | pearlite and cementite |
| Answer» B. wholly austenite | |
| 18. |
Shock resisting steels should have |
| A. | low wear resistance |
| B. | low hardness |
| C. | low tensile strength |
| D. | toughness |
| Answer» E. | |
| 19. |
A column is known as a long column if the slenderness ratio is |
| A. | 40 |
| B. | 50 |
| C. | 70 |
| D. | 100 |
| Answer» E. | |
| 20. |
Circumferential joint in boilers is used to get the required length of a boiler. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
The ball bearings are provided with a cage |
| A. | to reduce friction |
| B. | to facilitate slipping of balls |
| C. | to prevent the lubricant from flowing out |
| D. | to maintain the balls at a fixed distance apart |
| Answer» E. | |
| 22. |
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be |
| A. | square threads |
| B. | acme threads |
| C. | knuckle threads |
| D. | buttress threads |
| Answer» E. | |
| 23. |
In radial cams, the follower moves |
| A. | in a direction perpendicular to the cam axis |
| B. | in a direction parallel to the cam axis |
| C. | in any direction irrespective of cam axis |
| D. | along the cam axis |
| Answer» B. in a direction parallel to the cam axis | |
| 24. |
The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 25. |
A pair of friction discs is an example of rolling pair. |
| A. | True |
| B. | False |
| Answer» C. | |
| 26. |
In second type of levers, |
| A. | load is in between the fulcrum and effort |
| B. | effort is in between the fulcrum and load |
| C. | fulcrum is in between the load and effort |
| D. | none of these |
| Answer» B. effort is in between the fulcrum and load | |
| 27. |
In order to balance the reciprocating masses, |
| A. | primary forces and couples must be balanced |
| B. | secondary forces and couples must be balanced |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 28. |
An automobile steering gear is an example of |
| A. | sliding pair |
| B. | rolling pair |
| C. | lower pair |
| D. | higher pair |
| Answer» D. higher pair | |
| 29. |
If / n is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 360 |
| Answer» D. 360 | |
| 30. |
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a |
| A. | lower pair |
| B. | higher pair |
| C. | self-closed pair |
| D. | force-closed pair |
| Answer» B. higher pair | |
| 31. |
The steering of a ship means |
| A. | movement of a complete ship up and down in vertical plane about transverse axis |
| B. | turning of a complete ship in a curve towards right or left, while it moves forward |
| C. | rolling of a complete ship side-ways |
| D. | none of the above |
| Answer» C. rolling of a complete ship side-ways | |
| 32. |
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be |
| A. | minimum |
| B. | zero |
| C. | maximum |
| D. | none of these |
| Answer» C. maximum | |
| 33. |
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called |
| A. | dedendum |
| B. | addendum |
| C. | clearance |
| D. | working depth |
| Answer» B. addendum | |
| 34. |
The two elements of a pair are said to form a __________ when they permit relative motion between them. |
| A. | open pair |
| B. | kinematic pair |
| Answer» C. | |
| 35. |
When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train. |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 36. |
If / n = 2, where co is the frequency of excitation and n is the natural frequency of vibrations, then the transmissibility of vibration will the |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» C. 1.5 | |
| 37. |
In under damped vibrating system, the amplitude of vibration |
| A. | decreases linearly with time |
| B. | increases linearly with time |
| C. | decreases exponentially with time |
| D. | increases exponentially with time |
| Answer» D. increases exponentially with time | |
| 38. |
In railway axle boxes, the bearing used is |
| A. | deep groove ball bearing |
| B. | double row self-aligning ball bearing |
| C. | double row spherical roller bearing |
| D. | cylindrical roller bearing |
| Answer» D. cylindrical roller bearing | |
| 39. |
The pair is known as a higher pair, when the relative motion between the elements of a pair is |
| A. | turning only |
| B. | sliding only |
| C. | rolling only |
| D. | partly turning and partly sliding |
| Answer» E. | |
| 40. |
When the connection between the two elements is such that only required kind of relative motion occurs, it is known as self-closed pair. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 41. |
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is |
| A. | chromium |
| B. | nickel |
| C. | vanadium |
| D. | cobalt |
| Answer» E. | |
| 42. |
The Whitworth quick return motion mechanism is formed in a slider crank chain when the |
| A. | coupler link is fixed |
| B. | longest link is a fixed link |
| C. | slider is a fixed link |
| D. | smallest link is a fixed link |
| Answer» B. longest link is a fixed link | |
| 43. |
The acceleration of the particle moving with simple harmonic motion is inversely proportional to the displacement of the particle from the mean position. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 44. |
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon |
| A. | total lift, total angle of lift, minimum radius of cam and cam speed |
| B. | radius of circular arc, cam speed, location of centre of circular arc and roller diameter |
| C. | mass of cam follower linkage, spring stiffness and cam speed |
| D. | total lift, centre of gravity of the cam and cam speed |
| Answer» B. radius of circular arc, cam speed, location of centre of circular arc and roller diameter | |
| 45. |
Tungsten when added to steel __________ the critical temperature. |
| A. | does not effect |
| B. | lowers |
| C. | raises |
| Answer» D. | |
| 46. |
Cast iron is manufactured in |
| A. | blast furnace |
| B. | cupola |
| C. | open hearth furnace |
| D. | bessemer converter |
| Answer» C. open hearth furnace | |
| 47. |
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be |
| A. | stable |
| B. | unstable |
| C. | isochronous |
| D. | none of these |
| Answer» C. isochronous | |
| 48. |
Silicon when added to copper improves |
| A. | machinability |
| B. | hardness |
| C. | hardness and strength |
| D. | strength and ductility |
| Answer» D. strength and ductility | |
| 49. |
Haematite iron ore contains iron about |
| A. | 30% |
| B. | 45% |
| C. | 55% |
| D. | 70% |
| Answer» E. | |
| 50. |
The material in which the atoms are arranged regularly in some directions but not in others, is called |
| A. | amorphous material |
| B. | mesomorphous material |
| C. | crystalline material |
| D. | none of these |
| Answer» C. crystalline material | |