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.
| 301. |
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 | |
| 302. |
The spindles of bench vices are usually provided with knuckle threads. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 303. |
According to Indian standards, total number of tolerance grades are |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 304. |
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be |
| A. | 45 to 60% |
| B. | 63 to 70% |
| C. | 70 to 83% |
| D. | 80 to 90% |
| Answer» D. 80 to 90% | |
| 305. |
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 | |
| 306. |
The cap screws are |
| A. | slotted for a screw driver and are generally used with a nut |
| B. | similar to tap bolts except that they are of small size and a variety of shapes of heads are available |
| C. | used to prevent relative motion between the two parts |
| D. | none of the above |
| Answer» C. used to prevent relative motion between the two parts | |
| 307. |
In skew bevel gearing, the axes of shafts are |
| A. | intersecting and the teeth are curved |
| B. | non-intersecting and non-parallel and the teeth are curved |
| C. | non-intersecting and non-parallel and the teeth are straight |
| D. | none of the above |
| Answer» D. none of the above | |
| 308. |
An universal coupling is a type of __________ coupling. |
| A. | rigid |
| B. | flexible |
| Answer» C. | |
| 309. |
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. | |
| 310. |
If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| Answer» D. | |
| 311. |
The included angle for the British standard whitworth thread is |
| A. | 29° |
| B. | 47.5° |
| C. | 55° |
| D. | 60° |
| Answer» D. 60° | |
| 312. |
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. | |
| 313. |
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 | |
| 314. |
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. | |
| 315. |
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. | |
| 316. |
The thickness of key is usually taken equal to one-sixth of diameter of shaft. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 317. |
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 | |
| 318. |
The buttress threads have low frictional resistance characteristic of the square threads and have the same strength of V-threads. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 319. |
The tension on the slack side of the belt is __________ the tension on the tight side of the belt. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» C. greater than | |
| 320. |
The malleable material should be plastic but is not essential to be so strong. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 321. |
The steel widely used for motor car crankshafts is |
| A. | nickel steel |
| B. | chrome steel |
| C. | nickel chrome steel |
| D. | high speed steel |
| Answer» C. nickel chrome steel | |
| 322. |
When a helical compression spring is cut into halves, the stiffness of the resulting spring will be |
| A. | same |
| B. | double |
| C. | one-half |
| D. | one-fourth |
| Answer» C. one-half | |
| 323. |
The transverse fillet welded joints are designed for |
| A. | tensile strength |
| B. | compressive strength |
| C. | bending strength |
| D. | shear strength |
| Answer» B. compressive strength | |
| 324. |
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. | |
| 325. |
When the fulcrum is in between the load and effort, the lever is said to be of |
| A. | first type |
| B. | second type |
| C. | third type |
| D. | any one of these |
| Answer» B. second type | |
| 326. |
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 | |
| 327. |
According to Indian standards, total number of fundamental deviations are |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» E. | |
| 328. |
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 | |
| 329. |
In a bolt, the plane of shear should be across the threaded portion of the shank. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 330. |
When a metal or alloy is cold worked, |
| A. | its hardness and strength increases |
| B. | it is worked below recrystallisation temperature |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 331. |
The diameter of knuckle pin in a knuckle joint is usually taken as (where = Diameter of the rod) |
| A. | 0.5 |
| B. | 0.8 |
| C. | 1.2 |
| Answer» D. | |
| 332. |
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 | |
| 333. |
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 | |
| 334. |
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 | |
| 335. |
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 | |
| 336. |
According to I.B.R., the factor of safety of riveted joint should not be less than |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 337. |
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 | |
| 338. |
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. | Good man relation |
| D. | none of these |
| Answer» D. none of these | |
| 339. |
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given by Where m = mass of belt per meter (kg/m) v = belt velocity (m/s) f = coefficient of friction a = angle of wrap (radians)%! |
| A. | (P1 - mv²)/ (P2 - mv²) = eᶠα |
| B. | P1 / P2 = eᶠα |
| C. | P1 / P2 = e–ᶠα |
| D. | (P1 - mv²)/ (P2 - mv²) = e–ᶠα |
| Answer» B. P1 / P2 = e¬∑‚àÇ‚Ä ≈í¬± | |
| 340. |
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given by Where m = mass of belt per meter (kg/m) v = belt velocity (m/s) f = coefficient of friction a = angle of wrap (radians)%! |
| A. | (P1 - mv²)/ (P2 - mv²) = eᶠα |
| B. | P1 / P2 = eᶠα |
| C. | P1 / P2 = e–ᶠα |
| D. | (P1 - mv²)/ (P2 - mv²) = e–ᶠα |
| Answer» B. P1 / P2 = e¬∑‚àÇ‚Ä ≈í¬± | |
| 341. |
Fibrous fracture occurs in%! |
| A. | Ductile material |
| B. | Brittle material |
| C. | Elastic material |
| D. | Hard material |
| Answer» B. Brittle material | |
| 342. |
Which of the following welded joint is designed for shear strength?%! |
| A. | Transverse fillet welded joint |
| B. | Parallel fillet welded joint |
| C. | Butt welded joint |
| D. | All of these |
| Answer» C. Butt welded joint | |
| 343. |
Crushing resistance required to crush the rivet per pitch length is%! |
| A. | p.d.σc |
| B. | p.t.σc |
| C. | n.d.t.σc |
| D. | (p - d) t.σc |
| Answer» D. (p - d) t.≈ì√âc | |
| 344. |
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 | |
| 345. |
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 | |
| 346. |
Belt slip may occur due to%! |
| A. | Heavy load |
| B. | Loose belt |
| C. | Driving pulley too small |
| D. | All of the above |
| Answer» E. | |
| 347. |
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 | |
| 348. |
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 | |
| 349. |
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 | |
| 350. |
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 | |