MCQOPTIONS
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MCQOPTIONS
This section includes 991 Mcqs, each offering curated multiple-choice questions to sharpen your GATE (Mechanical Engineering) knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
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 | |
| 202. |
The stretching in a belt can be controlled by __________ the stress in the belt. |
| A. | Reducing |
| B. | Increasing |
| C. | Both A and B |
| D. | None of these |
| Answer» B. Increasing | |
| 203. |
A sliding bearing which operates without any lubricant present, is called |
| A. | Zero film bearing |
| B. | Boundary lubricated bearing |
| C. | Hydrodynamic lubricated bearing |
| D. | Hydrostatic lubricated bearing |
| Answer» B. Boundary lubricated bearing | |
| 204. |
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the |
| A. | Tip of the pinion and flank of gear |
| B. | Tip of the gear and flank of pinion |
| C. | Flanks of both gear and pinion |
| D. | Tip of both gear and pinion |
| Answer» C. Flanks of both gear and pinion | |
| 205. |
The lower deviation is the algebraic difference between the |
| A. | Actual size and the corresponding basic size |
| B. | Maximum limit and the basic size |
| C. | Minimum limit and the basic size |
| D. | None of the above |
| Answer» D. None of the above | |
| 206. |
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 | |
| 207. |
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 | |
| 208. |
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of |
| A. | 0.45 |
| B. | 0.55 |
| C. | 0.65 |
| D. | 0.75 |
| Answer» E. | |
| 209. |
The cam follower extensively used in aircraft engines is |
| A. | Knife edge follower |
| B. | Flat faced follower |
| C. | Spherical faced follower |
| D. | Roller follower |
| Answer» E. | |
| 210. |
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given byWhere m = mass of belt per meter (kg/m)v = belt velocity (m/s)f = coefficient of frictiona = 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 = eᶠα | |
| 211. |
Fibrous fracture occurs in |
| A. | Ductile material |
| B. | Brittle material |
| C. | Elastic material |
| D. | Hard material |
| Answer» B. Brittle material | |
| 212. |
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 | |
| 213. |
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material) |
| A. | p.d.σt |
| B. | p.t.σt |
| C. | (p - d) t.σt |
| D. | |
| Answer» E. | |
| 214. |
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.σc | |
| 215. |
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/tanθ | |
| 216. |
Two shafts will have equal strength, if |
| A. | Diameter of both the shafts is same |
| B. | Angle of twist of both the shafts is same |
| C. | Material of both the shafts is same |
| D. | Twisting moment of both the shafts is same |
| Answer» E. | |
| 217. |
For same pulley diameters, center distance, belt speed and belt and pulley materials, |
| A. | Open belt drive transmits more power than crossed belt drive |
| B. | Crossed belt drive transmits more power than open belt drive |
| C. | Open and crossed belt drives transmit same power |
| D. | Power transmission does not depend upon open and crossed types of constructions |
| Answer» C. Open and crossed belt drives transmit same power | |
| 218. |
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by |
| A. | (k₁ k₂)/ (k₁ + k₂) |
| B. | (k₁ - k₂)/ (k₁ + k₂) |
| C. | (k₁ + k₂)/ (k₁ k₂) |
| D. | (k₁ - k₂)/ (k₁ k₂) |
| Answer» B. (k₁ - k₂)/ (k₁ + k₂) | |
| 219. |
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 | |
| 220. |
According to Rankine's theory, the failure occurs at a point in a member |
| A. | When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test |
| B. | When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test |
| C. | When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test |
| D. | When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test |
| Answer» C. When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test | |
| 221. |
The product of the diametral pitch and circular pitch is equal to |
| A. | 1 |
| B. | 1/π |
| C. | π |
| D. | π × number of teeth |
| Answer» D. π × number of teeth | |
| 222. |
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to |
| A. | 0.2 |
| B. | 0.25 |
| C. | 0.50 |
| D. | 0.6 |
| Answer» C. 0.50 | |
| 223. |
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length) |
| A. | (π/4) d² × τ × n |
| B. | 1.875 × (π/4) d² × τ × n |
| C. | 2 × (π/4) d² × τ × n |
| D. | 3 × (π/4) d² × τ × n |
| Answer» C. 2 × (π/4) d² × τ × n | |
| 224. |
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. | |
| 225. |
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately |
| A. | 0.4 times |
| B. | 0.6 times |
| C. | 0.7 times |
| D. | 0.8 times |
| Answer» B. 0.6 times | |
| 226. |
In the levers of first type, the mechanical advantage is ________ one. |
| A. | Less than |
| B. | Equal to |
| C. | More than |
| D. | None of these |
| Answer» D. None of these | |
| 227. |
Wahl's stress factor __________ very rapidly as the spring index decreases. |
| A. | Increases |
| B. | Decreases |
| C. | Remain same |
| D. | None of these |
| Answer» B. Decreases | |
| 228. |
In Vickers hardness testing, the pyramid indentor apex is |
| A. | 40° |
| B. | 122° |
| C. | 136° |
| D. | 152° |
| Answer» D. 152° | |
| 229. |
Ball bearing type screws are found in following application |
| A. | Screw jack |
| B. | Aeroplane engines |
| C. | Crane |
| D. | Steering mechanism |
| Answer» E. | |
| 230. |
The period during which the cam follower remains at rest, when cam moves, is known as |
| A. | Constant period |
| B. | Fixed period |
| C. | Dwell period |
| D. | Idle period |
| Answer» D. Idle period | |
| 231. |
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called |
| A. | Bondability |
| B. | Embeddability |
| C. | Comformability |
| D. | Fatigue strength |
| Answer» C. Comformability | |
| 232. |
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be |
| A. | 8 |
| B. | 6 |
| C. | 4 |
| D. | 10 |
| Answer» B. 6 | |
| 233. |
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» B. 6 | |
| 234. |
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. | |
| 235. |
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is |
| A. | F + P |
| B. | F.P |
| C. | P |
| D. | F |
| Answer» B. F.P | |
| 236. |
Which is correct statement? |
| A. | A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron |
| B. | A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel |
| C. | Both will be equally rigid |
| D. | Which one is rigid will depend on several other factors |
| Answer» C. Both will be equally rigid | |
| 237. |
Which of the following statement is correct for gears? |
| A. | The pitch circle diameter is equal to the product of module and number of teeth |
| B. | The addendum is less than dedendum |
| C. | The pitch circle is always greater than the base circle |
| D. | All of the above |
| Answer» E. | |
| 238. |
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. | |
| 239. |
The material commonly used for crane hooks is |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Mild steel |
| D. | Aluminium |
| Answer» C. Mild steel | |
| 240. |
A flange coupling is used to connect two shafts |
| A. | Which are perfectly aligned |
| B. | Which are not in exact alignment |
| C. | Have lateral misalignment |
| D. | Whose axes intersect at a small angle |
| Answer» B. Which are not in exact alignment | |
| 241. |
Oldham coupling is used to connect two shafts |
| A. | Which are perfectly aligned |
| B. | Which are not in exact alignment |
| C. | Which have lateral misalignment |
| D. | Whose axes intersect at a small angle |
| Answer» D. Whose axes intersect at a small angle | |
| 242. |
A universal coupling is used to connect two shafts |
| A. | Which are not in exact alignment |
| B. | Which are perfectly aligned |
| C. | Whose axes intersect at a small angle |
| D. | Have lateral misalignment |
| Answer» D. Have lateral misalignment | |
| 243. |
A transmission shaft includes |
| A. | Over head shaft |
| B. | Counter shaft |
| C. | Line shaft |
| D. | All of these |
| Answer» E. | |
| 244. |
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to |
| A. | (1/2) × √(M² + T²) |
| B. | √(M² + T²) |
| C. | (1/2) × [M + √(M² + T²)] |
| D. | M + √(M² + T²) |
| Answer» C. (1/2) × [M + √(M² + T²)] | |
| 245. |
The endurance limit for a mirror polished material will be __________ as compared to unpolished material. |
| A. | Same |
| B. | Less |
| C. | More |
| D. | None of these |
| Answer» D. None of these | |
| 246. |
Silver based solder is used for |
| A. | Flaring |
| B. | Brazing |
| C. | Soft soldering |
| D. | Fusion welding |
| Answer» C. Soft soldering | |
| 247. |
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 | |
| 248. |
The function of a washer is to |
| A. | Provide cushioning effect |
| B. | Provide bearing area |
| C. | Absorb shocks and vibrations |
| D. | Provide smooth surface in place of rough surface |
| Answer» C. Absorb shocks and vibrations | |
| 249. |
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is |
| A. | Equal to 1/10 |
| B. | Less than 1/10 |
| C. | Greater than 1/10 |
| D. | None of these |
| Answer» D. None of these | |
| 250. |
The contact ratio is the ratio of |
| A. | Length of arc of recess to the circular pitch |
| B. | Length of path of contact to the circular pitch |
| C. | Length of arc of contact to the circular pitch |
| D. | Length of arc of approach to the circular pitch |
| Answer» D. Length of arc of approach to the circular pitch | |