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.
| 1001. |
A quarter turn belt drive is used when the shafts are arranged at right angles and rotate in one definite direction. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1002. |
Auto frettage is the method of |
| A. | joining thick cylinders |
| B. | calculating stresses in thick cylinders |
| C. | prestressing thick cylinders |
| D. | increasing the life of thick cylinders |
| Answer» D. increasing the life of thick cylinders | |
| 1003. |
The plasticity is the property of a material which enables it to |
| A. | regain its original shape after deformation when the external forces are removed |
| B. | draw into wires by the application of a tensile force |
| C. | resist fracture due to high impact loads |
| D. | retain deformation produced under load permanently |
| Answer» E. | |
| 1004. |
A turn buckle is used to connect two round rods subjected to tensile loading and requiring subsequent adjustment for tightening or loosening. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1005. |
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the |
| A. | initial tension |
| B. | external load applied |
| C. | sum of the initial tension and external load applied |
| D. | initial tension or external load, whichever is greater |
| Answer» E. | |
| 1006. |
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load W. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'. |
| A. | one-eighth |
| B. | one-fourth |
| C. | one-half |
| D. | double |
| Answer» B. one-fourth | |
| 1007. |
During hot working of metals, |
| A. | porosity of the metal is largely eliminated |
| B. | grain structure of the metal is refined |
| C. | mechanical properties are improved due of refinement of grains |
| D. | all of the above |
| Answer» E. | |
| 1008. |
The draw of cotter should not be more than |
| A. | 3 mm |
| B. | 6 mm |
| C. | 8 mm |
| D. | 12 mm |
| Answer» B. 6 mm | |
| 1009. |
The bolts of smaller diameter than M16 are not permitted in making fluid tight joints. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1010. |
The Lewis equation for gear tooth with involute profile predicts the static load capacity of cantilever beam of uniform strength. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 1011. |
When the effort is in between the fulcrum and load, the lever is said to be of third type. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1012. |
In a butt welded joint, the size of weld is __________ the throat of weld. |
| A. | 0.5 times |
| B. | equal to |
| C. | <span class="root">2</span> |
| D. | times |
| E. | double |
| Answer» C. <span class="root">2</span> | |
| 1013. |
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation? |
| A. | Woodruff key |
| B. | Feather key |
| C. | Gib-head key |
| D. | Tangent key |
| Answer» E. | |
| 1014. |
Which of the following cotter joint will be used to connect strap end of a connecting rod ? |
| A. | Spigot and socket cotter joint |
| B. | Sleeve and cotter joint |
| C. | Gib and cotter joint |
| D. | any one of these |
| Answer» D. any one of these | |
| 1015. |
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/561-62-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/561-62-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/561-62-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/561-62-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/machine-design/561-62-4.png"> | |
| 1016. |
Which of the following bearing is preferred for oscillating conditions? |
| A. | Double row roller bearing |
| B. | Taper roller bearing |
| C. | Angular contact single row ball bearing |
| D. | Needle roller bearing |
| Answer» E. | |
| 1017. |
According to Indian standards, total number of fundamental deviations are |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» E. | |
| 1018. |
When compared to the rod of the same diameter and material, a wire rope |
| A. | is less flexible |
| B. | has a much smaller load carrying capacity |
| C. | does not provide much warning before failure |
| D. | provides much greater time for remedial action before failure |
| Answer» C. does not provide much warning before failure | |
| 1019. |
In case of thick cylinders, the tangential stress across the thickness of cylinder is |
| A. | maximum at the outer surface and minimum at the inner surface |
| B. | maximum at the inner surface and minimum at the outer surface |
| C. | maximum at the inner surface and zero at the outer surface |
| D. | maximum at the outer surface and zero at the inner surface |
| Answer» C. maximum at the inner surface and zero at the outer surface | |
| 1020. |
The cam follower generally used in automobile engines is |
| A. | knife edge follower |
| B. | flat faced follower |
| C. | spherical faced follower |
| D. | roller follower |
| Answer» D. roller follower | |
| 1021. |
The malleable material should be plastic but is not essential to be so strong. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1022. |
When an open coiled helical compression spring is subjected to an axial load (W), the compression produced in the spring will be (where n = No. of active turns of the spring, and G = Modulus of rigidity for the spring material) |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/592-427-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/592-427-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/592-427-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/592-427-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/machine-design/592-427-4.png"> | |
| 1023. |
In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of |
| A. | combined effect of transverse shear stress and bending stress in the wire |
| B. | combined effect of bending stress and curvature of the wire |
| C. | combined effect of transverse shear stress and curvature of wire |
| D. | combined effect of torsional shear stress and transverse shear stress in the wire |
| Answer» C. combined effect of transverse shear stress and curvature of wire | |
| 1024. |
Multiple threads are used to secure |
| A. | low efficiency |
| B. | high efficiency |
| C. | high load lifting capacity |
| D. | high mechanical advantage |
| Answer» C. high load lifting capacity | |
| 1025. |
The fatigue limit of a material is greatly decreased by poor surface conditions. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 1026. |
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as |
| A. | both the ends fixed |
| B. | both the ends hinged |
| C. | one end fixed and the other end hinged |
| D. | one end fixed and the other end free |
| Answer» E. | |
| 1027. |
In a journal bearing, the load on the bearing is __________ to the axis of the journal. |
| A. | parallel |
| B. | perpendicular |
| Answer» C. | |
| 1028. |
An imaginary circle which by pure rolling action gives the same motion as the actual gear, is called |
| A. | addendum circle |
| B. | dedendum circle |
| C. | pitch circle |
| D. | clearance circle |
| Answer» D. clearance circle | |
| 1029. |
When the frictional force helps to apply the brake, then the brake is said to be self-energizing brake. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 1030. |
A bolt of M 24 x 2 means that |
| A. | the pitch of the thread is 24 mm and depth is 2 mm |
| B. | cross-sectional area of the threads is 24 mm |
| C. | <sup>2</sup> |
| D. | the nominal diameter of bolt is 24 mm and pitch is 2 mm |
| E. | the effective diameter of bolt is 24 mm and there are 2 threads per cm |
| Answer» D. the nominal diameter of bolt is 24 mm and pitch is 2 mm | |
| 1031. |
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle. |
| A. | larger than |
| B. | smaller than |
| C. | equal to |
| Answer» C. equal to | |
| 1032. |
The value of Lewis form factor used in design of gears is |
| A. | dependent on number of teeth of a gear |
| B. | dependent on system of teeth |
| C. | independent of size of teeth |
| D. | all of these |
| Answer» E. | |
| 1033. |
The maximum bending stress in a curved beam having symmetrical section always occur at the |
| A. | centroidal axis |
| B. | neutral axis |
| C. | inside fibre |
| D. | outside fibre |
| Answer» D. outside fibre | |
| 1034. |
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called |
| A. | normal pitch |
| B. | axial pitch |
| C. | diametral pitch |
| D. | module |
| Answer» B. axial pitch | |
| 1035. |
The longitudinal joint in boilers is used to get the required |
| A. | length of boiler |
| B. | diameter of boiler |
| C. | length and diameter of boiler |
| D. | efficiency of boiler |
| Answer» C. length and diameter of boiler | |
| 1036. |
The temperature at which the new grains are formed in the metal is known as |
| A. | lower critical temperature |
| B. | upper critical temperature |
| C. | recrystallisation temperature |
| D. | none of these |
| Answer» D. none of these | |
| 1037. |
When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/562-75-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/562-75-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/562-75-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/562-75-4.png"> |
| Answer» E. | |
| 1038. |
If a bearing is designated by the number 305, it means that the bearing is of |
| A. | light series whose bore is 5 mm |
| B. | light series whose bore is 25 mm |
| C. | medium series whose bore is 5 mm |
| D. | medium series whose bore is 25 mm |
| Answer» E. | |
| 1039. |
The bearings of medium series have capacity __________ over the light series. |
| A. | 10 to 20% |
| B. | 20 to 30% |
| C. | 30 to 40% |
| D. | 40 to 50% |
| Answer» D. 40 to 50% | |
| 1040. |
The backlash for spur gears depends upon |
| A. | module |
| B. | pitch line velocity |
| C. | tooth profile |
| D. | both (a) and (b) |
| Answer» E. | |
| 1041. |
The rolling contact bearings are known as |
| A. | thick lubricated bearings |
| B. | plastic bearings |
| C. | thin lubricated bearings |
| D. | antifriction bearings |
| Answer» E. | |
| 1042. |
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to |
| A. | increase the key length |
| B. | increase the key depth |
| C. | increase the key width |
| D. | decrease the key length |
| Answer» B. increase the key depth | |
| 1043. |
The springs mostly used in machinery have spring index less than 3. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 1044. |
The unit discharge through the turbine is |
| A. | <img src="/_files/images/mechanical-engineering/hydraulic-machines/197-75-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulic-machines/197-75-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulic-machines/197-75-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulic-machines/197-75-4.png"> |
| Answer» B. <img src="/_files/images/mechanical-engineering/hydraulic-machines/197-75-2.png"> | |
| 1045. |
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of |
| A. | 2 mm |
| B. | 2.22 mm |
| C. | 2.50 mm |
| D. | 3.0 mm |
| Answer» C. 2.50 mm | |
| 1046. |
When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as |
| A. | angular bevel gears |
| B. | crown bevel gears |
| C. | internal bevel gears |
| D. | mitre gears |
| Answer» E. | |
| 1047. |
The surface finish factor for a mirror polished material is |
| A. | 0.45 |
| B. | 0.65 |
| C. | 0.85 |
| D. | 1 |
| Answer» E. | |
| 1048. |
A shoe brake is commonly used in railway trains. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 1049. |
Strain rosettes are used to |
| A. | measure shear strain |
| B. | measure linear strain |
| C. | measure volumetric strain |
| D. | relieve strain |
| Answer» C. measure volumetric strain | |
| 1050. |
Which of the following statement is correct for gears? |
| A. | The addendum is less than dedendum |
| B. | The pitch circle diameter is equal to the product of module and number of teeth |
| C. | The pitch circle is always greater than the base circle |
| D. | all of the above |
| Answer» E. | |