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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.
| 601. |
In time study, the rating factor is applied to determine |
| A. | standard time of a job |
| B. | merit rating of the worker |
| C. | fixation of incentive rate |
| D. | normal time of a worker |
| Answer» E. | |
| 602. |
A locking device extensively used in marine type connecting rod ends is a |
| A. | jam nut |
| B. | castle nut |
| C. | sawn nut |
| D. | ring nut |
| Answer» E. | |
| 603. |
The V-belts are particularly suitable for __________ drives. |
| A. | short |
| B. | long |
| Answer» B. long | |
| 604. |
The ratio of driving tensions in V-belt drives is __________ flat belt drives. |
| A. | equal to |
| B. | sin times more than |
| C. | sin times less than |
| D. | cosec times more than |
| Answer» E. | |
| 605. |
Which of the following has threads at both ends? |
| A. | Bolt |
| B. | Tap bolt |
| C. | Stud |
| D. | none of these |
| Answer» D. none of these | |
| 606. |
A bolt is designed on the basis of __________ with a large factor of safety. |
| A. | direct tensile stress |
| B. | direct compressive stress |
| C. | direct bending stress |
| D. | direct shear stress |
| Answer» B. direct compressive stress | |
| 607. |
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/565-113-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/565-113-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/565-113-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/565-113-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/machine-design/565-113-3.png"> | |
| 608. |
The shear stress at a point in a shaft subjected to a torque is |
| A. | directly proportional to the polar moment of inertia and to the distance of the point from the axis |
| B. | directly proportional to the applied torque and inversely proportional to the polar moment of inertia |
| C. | directly proportional to the applied torque and the polar moment of inertia |
| D. | inversely proportional to the applied torque and the polar moment of inertia |
| Answer» C. directly proportional to the applied torque and the polar moment of inertia | |
| 609. |
A screw is specified by its |
| A. | major diameter |
| B. | minor diameter |
| C. | pitch diameter |
| D. | pitch |
| Answer» B. minor diameter | |
| 610. |
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is |
| A. | bending stress only |
| B. | a combination of torsional shear stress and bending |
| C. | direct shear stress only |
| D. | a combination of bending stress and direct shear stress |
| Answer» B. a combination of torsional shear stress and bending | |
| 611. |
In radial bearings, the load acts __________ to the axis of rotation. |
| A. | parallel |
| B. | perpendicular |
| Answer» C. | |
| 612. |
When carbon in the cast iron is in the form of cementite, the cast iron will be of white colour. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 613. |
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have |
| A. | right hand threads |
| B. | left hand threads |
| C. | multiple threads |
| D. | pointed threads |
| Answer» B. left hand threads | |
| 614. |
When a cylinder is subjected to a very high internal fluid pressure, the thin cylinder should be used. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 615. |
The pitch diameter is the __________ diameter of an external or internal screw thread. |
| A. | effective |
| B. | smallest |
| C. | largest |
| Answer» B. smallest | |
| 616. |
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material. |
| A. | smaller |
| B. | greater |
| Answer» C. | |
| 617. |
A single strap butt joint is always in __________ shear. |
| A. | single |
| B. | double |
| Answer» B. double | |
| 618. |
18/8 steel contains |
| A. | 18% nickel and 8% chromium |
| B. | 18% chromium and 8% nickel |
| C. | 18% nickel and 8% vanadium |
| D. | 18% vanadium and 8% nickel |
| Answer» C. 18% nickel and 8% vanadium | |
| 619. |
The effective stress in wire ropes during normal working is equal to the stress due to |
| A. | axial load plus stress due to bending |
| B. | acceleration/retardation of masses plus stress due to bending |
| C. | axial load plus stress due to acceleration/retardation |
| D. | bending plus stress due to acceleration/retardation |
| Answer» B. acceleration/retardation of masses plus stress due to bending | |
| 620. |
A machine part subjected to __________ is called a strut. |
| A. | an axial tensile force |
| B. | an axial compressive force |
| C. | a tangential force |
| D. | any one of these |
| Answer» C. a tangential force | |
| 621. |
The yield point in static loading is __________ as compared to fatigue loading. |
| A. | higher |
| B. | lower |
| C. | same |
| Answer» B. lower | |
| 622. |
The minor diameter of a screw thread is also known as outside or nominal diameter. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 623. |
The velocity factor for ordinary cut gears operating at velocities upto 12.5 m/s is equal to |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/601-536-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/601-536-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/601-536-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/601-536-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/machine-design/601-536-3.png"> | |
| 624. |
Creep in belt is due to |
| A. | material of the belt |
| B. | material of the pulley |
| C. | uneven extensions and contractions due to varying tension |
| D. | all of the above |
| Answer» D. all of the above | |
| 625. |
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is . The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be |
| A. | /2 |
| B. | |
| C. | 2 |
| D. | 4 |
| Answer» C. 2 | |
| 626. |
Deep groove ball bearings are used for |
| A. | heavy thrust load only |
| B. | small angular displacement of shafts |
| C. | radial load at high speed |
| D. | combined thrust and radial loads at high speed |
| Answer» E. | |
| 627. |
In a sawn nut, a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 628. |
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves |
| A. | axially upwards |
| B. | axially downwards |
| C. | axially upwards or downwards |
| D. | none of these |
| Answer» D. none of these | |
| 629. |
A cotter joint is used to connect two __________ rods. |
| A. | co-axial |
| B. | perpendicular |
| C. | parallel |
| Answer» B. perpendicular | |
| 630. |
Teflon is used for bearings because of |
| A. | low coefficient of friction |
| B. | better heat dissipation |
| C. | smaller space consideration |
| D. | all of these |
| Answer» B. better heat dissipation | |
| 631. |
A steel containing upto 0.15% carbon is known as |
| A. | mild steel |
| B. | dead mild steel |
| C. | medium carbon steel |
| D. | high carbon steel |
| Answer» C. medium carbon steel | |
| 632. |
The maximum number of jets, generally, employed in an impulse turbine without jet interference are |
| A. | two |
| B. | four |
| C. | six |
| D. | eight |
| Answer» D. eight | |
| 633. |
The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by |
| A. | Boyle's law |
| B. | Charles' law |
| C. | Gay-Lussac law |
| D. | all of these |
| Answer» E. | |
| 634. |
The V-belt is used to transmit great amount of power and when the two pulleys are very near to each other. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 635. |
A type of brake commonly used in motor cars is a |
| A. | shoe brake |
| B. | band and block brake |
| C. | band brake |
| D. | internal expanding brake |
| Answer» E. | |
| 636. |
In a nut and bolt, the diameter at which the ridges on the bolt are in complete touch with the ridges of the corresponding nut, is called pitch diameter. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 637. |
If the size of a standard specimen for a fatigue testing machine is increased, the endurance limit for the material will |
| A. | have same value as that of standard specimen |
| B. | increase |
| C. | decrease |
| Answer» D. | |
| 638. |
A double strap butt joint (with equal straps) is |
| A. | always in single shear |
| B. | always in double shear |
| C. | either in single shear or double shear |
| D. | any one of these |
| Answer» C. either in single shear or double shear | |
| 639. |
For a bevel gear having the pitch angle , the ratio of formative number of teeth (TE) to actual number of teeth (T) is |
| A. | 1/sin |
| B. | 1/cos |
| C. | 1/tan |
| D. | sin cos |
| Answer» C. 1/tan | |
| 640. |
A castle nut is a locking device in which |
| A. | a thinner nut is tightened down over a thicker or main nut and the main nut is tightened against the thinner nut by loosening |
| B. | a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears |
| C. | a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction |
| D. | the bottom cylindrical portion is recessed to receive the tip of the locking set screw |
| Answer» C. a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction | |
| 641. |
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads. |
| A. | same |
| B. | double |
| C. | three times |
| D. | four times |
| Answer» C. three times | |
| 642. |
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zig-zag riveting is proposed. Which of the following statement is correct? |
| A. | There are four rivets per pitch length, all in double shear |
| B. | There are four rivets per pitch length, out of which two are in single shear and two are in double shear |
| C. | There are five rivets per pitch length, all in double shear |
| D. | There are five rivets per pitch length, out of which four are in double shear and one is in single shear |
| Answer» E. | |
| 643. |
The centre to centre distance between two consecutive rivets in a row, is called |
| A. | margin |
| B. | pitch |
| C. | back pitch |
| D. | diagonal pitch |
| Answer» C. back pitch | |
| 644. |
The property of a material which enables it to resist fracture due to high impact loads, is called toughness. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 645. |
The resultant axial load on a bolt depends upon |
| A. | external load applied |
| B. | initial tension due to tightening of the bolt |
| C. | relative elastic yielding of the bolt and the connected members |
| D. | all of the above |
| Answer» E. | |
| 646. |
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt, as |
| A. | <img src="/_files/images/mechanical-engineering/machine-design/564-99-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/machine-design/564-99-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/machine-design/564-99-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/machine-design/564-99-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/machine-design/564-99-3.png"> | |
| 647. |
When the lubricant is forced between the journal and the bearing by external pressure, the bearing is called hydrostatic lubricated bearing. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 648. |
An universal coupling is a type of __________ coupling. |
| A. | rigid |
| B. | flexible |
| Answer» C. | |
| 649. |
When a bolt is subjected to an external load, the stress induced in the bolt will be |
| A. | tensile stress |
| B. | shear stress |
| C. | combined tensile and shear stress |
| D. | any one of these |
| Answer» E. | |
| 650. |
Wire ropes as compared to cotton ropes |
| A. | are lighter in weight |
| B. | offer silent operation |
| C. | can withstand shock loads |
| D. | all of these |
| Answer» E. | |