MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1003 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
*$_When a machine member is subjected to torsion, the torsional shear stress set up in the member is? |
| A. | Zero at both the centroidal axis and outer surface of the member |
| B. | Maximum at both the centroidal axis and outer surface of the member |
| C. | Zero at the centroidal axis and maximum at the outer surface of the member |
| D. | Maximum at the centroidal axis and zero at the outer surface of the member |
| Answer» C. Zero at the centroidal axis and maximum at the outer surface of the member | |
| 402. |
*$_Stress concentration is caused due to? |
| A. | Variation in properties of material from point to point in a member |
| B. | Pitting at points or areas at which loads on a member are applied |
| C. | Abrupt change of section |
| D. | All of the above |
| Answer» E. | |
| 403. |
*$_The buckling load will be maximum for a column, if? |
| A. | One end of the column is clamped and the other end is free |
| B. | Both ends of the column are clamped |
| C. | Both ends of the column are hinged |
| D. | One end of the column is hinged and the other end is free |
| Answer» C. Both ends of the column are hinged | |
| 404. |
*$_In a horizontal flat belt drive, it is customary to use? |
| A. | Bottom side of belt as slack side |
| B. | Top side of belt as slack side |
| C. | Idler pulley |
| D. | None of the above |
| Answer» C. Idler pulley | |
| 405. |
*$_The groove angle of the pulley for rope drive is usually? |
| A. | 20° |
| B. | 35° |
| C. | 45° |
| D. | 60° |
| Answer» D. 60¬¨‚àû | |
| 406. |
*$_In a flange coupling, the bolts are subjected to? |
| A. | Tensile stress |
| B. | Compressive stress |
| C. | Shear stress |
| D. | None of these |
| Answer» D. None of these | |
| 407. |
*$_The objective of idler pulley in belt drive is to? |
| A. | Decrease the tendency of belt to slip |
| B. | Increase the power transmission capacity |
| C. | Increase the wrap angle and belt tension |
| D. | All the above objectives |
| Answer» E. | |
| 408. |
*$_The cold working of metals is carried out __________ the recrystallization temperature.? |
| A. | Above |
| B. | Below |
| C. | At |
| D. | None of these |
| Answer» C. At | |
| 409. |
*$_In a gear, having Involute teeth, the normal to the Involute is a tangent to the? |
| A. | Base circle |
| B. | Pitch circle |
| C. | Addendum circle |
| D. | Dedendum circle |
| Answer» B. Pitch circle | |
| 410. |
*$_Rivets are generally specified by? |
| A. | Thickness of plates to be riveted |
| B. | Length of rivet |
| C. | Diameter of head |
| D. | Nominal diameter |
| Answer» E. | |
| 411. |
*$_In case of pressure vessels having open ends, the fluid pressure induces? |
| A. | Longitudinal stress |
| B. | Circumferential stress |
| C. | Shear stress |
| D. | None of these |
| Answer» C. Shear stress | |
| 412. |
*$_Failure of a material is called fatigue when it fails? |
| A. | At the elastic limit |
| B. | Below the elastic limit |
| C. | At the yield point |
| D. | Below the yield point |
| Answer» E. | |
| 413. |
*$_In a butt welded joint, the size of weld is __________ the throat of weld.? |
| A. | 0.5 times |
| B. | Equal to |
| C. | 2 times |
| D. | Double |
| Answer» C. 2 times | |
| 414. |
*$_The load cup of a screw jack is made separate from the head of the spindle to? |
| A. | Prevent the rotation of load being lifted |
| B. | Enhance the load carrying capacity of the jack |
| C. | Reduce the effort needed for lifting the working load |
| D. | Reduce the value of frictional torque |
| Answer» B. Enhance the load carrying capacity of the jack | |
| 415. |
*$_When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the? |
| A. | Initial tension |
| B. | External load applied |
| C. | Sum of the initial tension and external load applied |
| D. | Initial tension or external load, whichever is greater |
| Answer» D. Initial tension or external load, whichever is greater | |
| 416. |
*$_Cast iron pipes are mainly used? |
| A. | For conveying steam |
| B. | In water and sewage systems |
| C. | In pressure lubrication systems on prime movers |
| D. | All of the above |
| Answer» C. In pressure lubrication systems on prime movers | |
| 417. |
*$_A compound belt drive is used when? |
| A. | Shafts are arranged parallel and rotate in the opposite directions |
| B. | Shafts are arranged parallel and rotate in the same directions |
| C. | Shafts are arranged at right angles and rotate in one definite direction |
| D. | None of the above |
| Answer» E. | |
| 418. |
*$_Spring stiffness is? |
| A. | Ratio of coil diameter to wire diameter |
| B. | Load required to produce unit deflection |
| C. | Its capability of storing energy |
| D. | Its ability to absorb shocks |
| Answer» C. Its capability of storing energy | |
| 419. |
*$_Residual stress in materials? |
| A. | Acts when external load is applied |
| B. | Becomes zero when external load is removed |
| C. | Is independent of external loads |
| D. | Is always harmful |
| Answer» D. Is always harmful | |
| 420. |
*$_The ultimate strength of steel in tension in comparison to shear is in the ratio of? |
| A. | 1: 1 |
| B. | 2:1 |
| C. | 3: 2 |
| D. | 2: 3 |
| Answer» D. 2: 3 | |
| 421. |
*$_For longitudinal joint in boilers, the type of joint used is? |
| A. | Butt joint with single cover plate |
| B. | Butt joint with double cover plate |
| C. | Lap joint with one ring overlapping the other |
| D. | Any one of the above |
| Answer» C. Lap joint with one ring overlapping the other | |
| 422. |
*$_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 | |
| 423. |
*$_When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is? |
| A. | Bending stress only |
| B. | A combination of torsional shear stress and bending |
| C. | Direct shear stress only |
| D. | A combination of bending stress and direct shear stress |
| Answer» B. A combination of torsional shear stress and bending | |
| 424. |
*$_Belt slip may occur due to? |
| A. | Heavy load |
| B. | Loose belt |
| C. | Driving pulley too small |
| D. | All of the above |
| Answer» E. | |
| 425. |
*$_In block brakes, the ratio of shoe width to wheel diameter is taken between? |
| A. | 0.1 and 0.25 |
| B. | 0.25 and 0.50 |
| C. | 0.50 and 0.75 |
| D. | 0.75 and 1 |
| Answer» C. 0.50 and 0.75 | |
| 426. |
*$_Ball bearing type screws are found in following application? |
| A. | Screw jack |
| B. | Aeroplane engines |
| C. | Crane |
| D. | Steering mechanism |
| Answer» E. | |
| 427. |
*$_Pitch point of a cam is? |
| A. | A point on the pitch curve having minimum pressure angle |
| B. | A point on the pitch curve having maximum pressure angle |
| C. | Any point on the pitch curve |
| D. | Any point on the pitch circle |
| Answer» C. Any point on the pitch curve | |
| 428. |
*$_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. | |
| 429. |
*$_The taper on cotter varies from? |
| A. | 1 in 24 to 1 in 20 |
| B. | 1 in 15 to 1 in 10 |
| C. | 1 in 32 to 1 in 24 |
| D. | 1 in 48 to 1 in 24 |
| Answer» E. | |
| 430. |
*$_A transmission shaft includes? |
| A. | Over head shaft |
| B. | Counter shaft |
| C. | Line shaft |
| D. | All of these |
| Answer» E. | |
| 431. |
*$_The stress in the threaded part of the bolt will be __________ as compared to the shank.? |
| A. | Same |
| B. | Higher |
| C. | Lower |
| D. | None of these |
| Answer» C. Lower | |
| 432. |
*$_For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is? |
| A. | 1/sinθ |
| B. | 1/cosθ |
| C. | 1/tanθ |
| D. | sinθ cosθ |
| Answer» C. 1/tan≈í‚àè | |
| 433. |
*/*_Which of the following spring is used in mechanical wrist watch?? |
| A. | Helical compression spring |
| B. | Spiral spring |
| C. | Torsion spring |
| D. | Belleville spring |
| Answer» D. Belleville spring | |
| 434. |
*/*_The width of the pulley should be __________ width of the belt.? |
| A. | Equal to |
| B. | Less than |
| C. | Greater than |
| D. | None of these |
| Answer» D. None of these | |
| 435. |
*/*_The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using? |
| A. | Gerber relation |
| B. | Soderberg relation |
| C. | Goodman relation |
| D. | None of these |
| Answer» D. None of these | |
| 436. |
*/*_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 | |
| 437. |
*/*_The surface finish factor for a mirror polished material is? |
| A. | 0.45 |
| B. | 0.65 |
| C. | 0.85 |
| D. | 1 |
| Answer» E. | |
| 438. |
*/*_Tensile strength of a mild steel specimen can be roughly predicted from following hardness test? |
| A. | Brinell |
| B. | Rockwell |
| C. | Vickers |
| D. | None of the above |
| Answer» B. Rockwell | |
| 439. |
*/*_When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads? |
| A. | Compression |
| B. | Tension |
| C. | Shear |
| D. | Combined loads |
| Answer» C. Shear | |
| 440. |
*/*_In V-belt drive, belt touches? |
| A. | At bottom |
| B. | At sides only |
| C. | Both at bottom and sides |
| D. | Could touch anywhere |
| Answer» C. Both at bottom and sides | |
| 441. |
*/*_A tapered key which fits in a key-way in the hub and is flat on the shaft, is known as? |
| A. | Woodruff key |
| B. | Feather key |
| C. | Flat saddle key |
| D. | Gib head key |
| Answer» D. Gib head key | |
| 442. |
*/*_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 | |
| 443. |
*/*_The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be? |
| A. | Same in both cases |
| B. | 2 times more |
| C. | 3 times more |
| D. | 4 times more |
| Answer» D. 4 times more | |
| 444. |
*/*_In cylindrical 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» C. In any direction irrespective of cam axis | |
| 445. |
*/*_The piston rod of a steam engine is usually connected to the cross-head by means of? |
| A. | Bolted joint |
| B. | Knuckle joint |
| C. | Cotter joint |
| D. | Universal joint |
| Answer» D. Universal joint | |
| 446. |
*/*_The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is? |
| A. | 1/2 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |
| 447. |
*/*_For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.? |
| A. | Less than unity |
| B. | Greater than unity |
| C. | Equal to 1 |
| D. | None of these |
| Answer» B. Greater than unity | |
| 448. |
*/*_The application of second type levers is found in? |
| A. | Handle of a hand pump |
| B. | Hand wheel of a punching press |
| C. | Lever of a loaded safety valve |
| D. | A pair of tongs |
| Answer» D. A pair of tongs | |
| 449. |
*/*_The edges of a boiler plate are bevelled to an angle of? |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 80° |
| Answer» E. | |
| 450. |
*/*_The building up of worn and undersized parts, subjected to repeated loads by electroplating is? |
| A. | Best method |
| B. | Extremely hazardous |
| C. | Has no effect as regards fatigue strength |
| D. | Cheapest method |
| Answer» B. Extremely hazardous | |