MCQOPTIONS
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MCQOPTIONS
This section includes 123 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A bolt___________________? |
| A. | has a head on one end and a nut fitted to the other |
| B. | has head at one end and other end fits into a tapped hole in the other part to be joined |
| C. | has both the ends threaded |
| D. | is provided with pointed threads |
| Answer» B. has head at one end and other end fits into a tapped hole in the other part to be joined | |
| 2. |
A bevel gear has pitch circle diameters of pinion and gear as 20 mm and 40 mm respectively. What is the face width of bevel gear? (m =module) |
| A. | 17.5 m |
| B. | 10 m |
| C. | 7.45 m |
| D. | 3.16 m |
| Answer» D. 3.16 m | |
| 3. |
A bevel gear made of steel pinion and steel gear has dynamic factor C equal to __________ |
| A. | 8900 e |
| B. | 10000 e |
| C. | 11500 e |
| D. | 15000 e |
| Answer» D. 15000 e | |
| 4. |
A bench vice has following type of threads____________________? |
| A. | metric |
| B. | square |
| C. | buttress |
| D. | acme |
| Answer» E. | |
| 5. |
A backing ring is used inside the pipe joint when making a___________________? |
| A. | butt weld |
| B. | fillet weld |
| C. | sleeve weld |
| D. | socket weld |
| Answer» B. fillet weld | |
| 6. |
Which of the following are true about plasticity? |
| A. | permanent deformation |
| B. | ability to retain deformation under load or after removal of load |
| C. | plastic deformation is greater than elastic deformation |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
Sliding contact bearings, also called plain bearings have no problem of wear. |
| A. | true |
| B. | false |
| Answer» C. | |
| 8. |
In steam and gas turbines, rolling contact bearings are used. |
| A. | true |
| B. | false |
| Answer» C. | |
| 9. |
A radial bearing supports the load that acts along the axis of the shaft. |
| A. | true |
| B. | false |
| Answer» C. | |
| 10. |
Which of the following are functions of bearings? |
| A. | ensure free rotation of shaft with minimum friction |
| B. | holding shaft in a correct position |
| C. | transmit the force of the shaft to the frame |
| D. | all of the listed |
| Answer» E. | |
| 11. |
The crankshaft should be inspected for |
| A. | cracks |
| B. | alignment of crankpins and journals |
| C. | cleanliness of oil gallaries |
| D. | all of the mentioned |
| Answer» E. | |
| 12. |
AÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â bearing supports the load acting along the axis of the shaft. |
| A. | thrust |
| B. | radial |
| C. | longitudinal |
| D. | transversal |
| Answer» B. radial | |
| 13. |
The crankshaft rotates the camshaft using |
| A. | belt drive |
| B. | chain drive |
| C. | gear drive |
| D. | motor drive |
| Answer» C. gear drive | |
| 14. |
In the cam, the distance between the base circle and the nose is called |
| A. | lift |
| B. | lobe |
| C. | flank |
| D. | pitch |
| Answer» B. lobe | |
| 15. |
The main causes of crankshaft vibration are |
| A. | variation in torque |
| B. | cyclic variation of gas and combustion products |
| C. | unbalanced weight of parts |
| D. | all of the mentioned |
| Answer» E. | |
| 16. |
The main reasons for crankshaft wear are |
| A. | different loads at some points of rotation |
| B. | centrifugal forces due to crankshaft rotation |
| C. | misalignment in connecting rod |
| D. | all of the mentioned |
| Answer» E. | |
| 17. |
Crankshafts are usually constructed by |
| A. | casting |
| B. | drop forging |
| C. | drawing |
| D. | extrusion |
| Answer» C. drawing | |
| 18. |
Camshaft gear is made from which material |
| A. | cast iron |
| B. | mild steel |
| C. | bakelite |
| D. | brass |
| Answer» D. brass | |
| 19. |
The material known as high carbon high copper chrome silicon cast steel is used for making |
| A. | camshaft |
| B. | cylinder body |
| C. | cylinder head |
| D. | piston |
| Answer» B. cylinder body | |
| 20. |
The gears on camshaft and crankshaft are known as |
| A. | lining gears |
| B. | aligning gears |
| C. | timing gears |
| D. | tuning gears |
| Answer» D. tuning gears | |
| 21. |
In a four stroke cycle engine camshaft revolves at              the crank speed. |
| A. | two times |
| B. | half |
| C. | four times |
| D. | three times |
| Answer» C. four times | |
| 22. |
The diameter of the hub of the flywheel is usually taken |
| A. | equal to the diameter of the shaft |
| B. | twice the diameter of the shaft |
| C. | three times the diameter of the shaft |
| D. | four times the diameter of the shaft |
| Answer» C. three times the diameter of the shaft | |
| 23. |
The cross-section of the flywheel arms is usually |
| A. | elliptical |
| B. | rectangular |
| C. | i-section |
| D. | l-section |
| Answer» B. rectangular | |
| 24. |
The tensile stress in the flywheel rim due to the centrifugal force acting on the rim is given by |
| A. | Ï v2/4 |
| B. | Ï v2/2 |
| C. | 3Ï v2/4 |
| D. | Ï v2 |
| Answer» E. | |
| 25. |
In order to find the maximum bending moment on the arms, it is assumed as a |
| A. | simply supported beam carrying a uniformly distributed load over the arm |
| B. | fixed at both ends |
| C. | cantilever beam fixed at the hub and carrying a concentrated load at the free end of the rim |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 26. |
Due to the centrifugal force acting on the rim, the flywheel arms will be subjected to |
| A. | tensile stress |
| B. | compressive stress |
| C. | shear stress |
| D. | none of the mentioned |
| Answer» B. compressive stress | |
| 27. |
The ratio of the maximum fluctuation of energy to the ……. is called coefficient of fluctuation of energy. |
| A. | minimum fluctuation of energy |
| B. | workdone per cycle |
| C. | maximum fluctuation of energy |
| D. | none of the mentioned |
| Answer» C. maximum fluctuation of energy | |
| 28. |
If E = Mean kinetic energy of the flywheel, CS = Coefficient of fluctuation of speed and Δ E = Maximum fluctuation of energy, then |
| A. | Δe = e / cs |
| B. | Δe = e2 × cs |
| C. | topic 4.2 flywheels considering stresses in rims and arms for engines and punching machines |
| Answer» C. topic 4.2 flywheels considering stresses in rims and arms for engines and punching machines | |
| 29. |
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called |
| A. | fluctuation of energy |
| B. | maximum fluctuation of energy |
| C. | coefficient of fluctuation of energy |
| D. | none of the mentioned |
| Answer» B. maximum fluctuation of energy | |
| 30. |
The coefficient of fluctuation of speed is the                    of maximum fluctuation of speed and the mean speed. |
| A. | product |
| B. | ratio |
| C. | sum |
| D. | difference |
| Answer» C. sum | |
| 31. |
Active and inactive, both types of coils support the load although both don’t participate in spring action. |
| A. | active coils don’t support the load |
| B. | inactive coils don’t support the load |
| C. | both active and inactive don’t support the load |
| D. | both active and inactive support the load |
| Answer» C. both active and inactive don’t support the load | |
| 32. |
If uncompressed length of spring is 40mm and number of coils 10mm, then pitch of coil is? |
| A. | 4 |
| B. | 40/9 c) 40/11 |
| C. | d) none of the mentioned |
| Answer» C. d) none of the mentioned | |
| 33. |
Pitch of coil is defined as axial distance in compressed state of the coil. |
| A. | yes |
| B. | it is measured in uncompressed state |
| C. | it is same in uncompressed or compressed state |
| D. | none of the listed |
| Answer» C. it is same in uncompressed or compressed state | |
| 34. |
Compressed length is smaller than the solid length. |
| A. | true |
| B. | false |
| Answer» C. | |
| 35. |
If the spring is compressed completely and the adjacent coils touch each other,the the length of spring is called as? |
| A. | solid length |
| B. | compressed length |
| C. | free length |
| D. | none of the mentioned |
| Answer» B. compressed length | |
| 36. |
A spring with index=15 is prone to buckling. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 37. |
If number of coils are 8 and wire diameter of spring 3mm, then solid length is given by? |
| A. | none of the listed |
| B. | 27mm |
| C. | 24mm |
| D. | 21mm |
| Answer» D. 21mm | |
| 38. |
The spring index is the ratio of wire diameter to mean coil diameter. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 39. |
If spring index=2.5, what can be concluded about stresses in the wire? |
| A. | they are high |
| B. | they are negligible |
| C. | they are moderate |
| D. | cannot be determined |
| Answer» B. they are negligible | |
| 40. |
Multi leaf springs are not recommended for automobile and rail road suspensions. |
| A. | true |
| B. | false |
| Answer» C. | |
| 41. |
The longest leaf in a leaf spring is called centre leaf. |
| A. | it is called middle leaf |
| B. | it is called master leaf |
| C. | yes |
| D. | none of the listed |
| Answer» C. yes | |
| 42. |
The helical spring ad wire of helical torsion spring, both are subjected to torsional shear stresses. |
| A. | true |
| B. | false |
| C. | topic 4.1 various types of springs, optimization of helical springs - rubber springs |
| Answer» C. topic 4.1 various types of springs, optimization of helical springs - rubber springs | |
| 43. |
How much should fuel oil be added to increase the moulding ability of sand? |
| A. | 0.01% – 0.1% |
| B. | 0.02% – 0.2% |
| C. | 0.03% – 0.3% |
| D. | 0.04% – 0.4% |
| Answer» B. 0.02% – 0.2% | |
| 44. |
Which of the following function can the spring perform? |
| A. | store energy |
| B. | absorb shock |
| C. | measure force |
| D. | all of the mentioned |
| Answer» E. | |
| 45. |
The helix angle is very small about 2â°. The spring is open coiled spring. |
| A. | yes |
| B. | it is closed coiled spring |
| C. | that small angle isn’t possible |
| D. | none of the listed |
| Answer» C. that small angle isn’t possible | |
| 46. |
Cereals improve flowability and lower collapsibility. |
| A. | true |
| B. | false |
| Answer» C. | |
| 47. |
Which of the following increases the dry strength of the sand? |
| A. | iron oxides |
| B. | fuel oils |
| C. | cereals |
| D. | dextrin and molasses |
| Answer» E. | |
| 48. |
Pitch maybe used up to what percent? |
| A. | 1% |
| B. | 2% |
| C. | 3% |
| D. | 4% |
| Answer» C. 3% | |
| 49. |
For bonding action of clays, what is the amount of water needed? |
| A. | 1.5%-8% |
| B. | 3.5%-11% |
| C. | 4.5%-12% |
| D. | 5.5%-13% |
| Answer» B. 3.5%-11% | |
| 50. |
What does the clay particle absorb in electrostatic bonding theory? |
| A. | complete water |
| B. | h+ ions |
| C. | oh–ions |
| D. | sand grains |
| Answer» D. sand grains | |