McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 201. |
For two meshing gears, their |
| A. | Clearance must be same |
| B. | No. of teeth must be same |
| C. | Dedendum must be same |
| D. | Addendum must be same |
| E. | Module must be same |
| Answer» E. Module must be same | |
| 202. |
The curve traced by the end of a thread as it is unwound from a stationary cylinder is known as |
| A. | Involute |
| B. | Circle |
| C. | Epicycloid |
| D. | Cycloid |
| E. | Straight line |
| Answer» A. Involute | |
| 203. |
The Ackermann steering gear consists of a four bar mechanism with |
| A. | Only one pair turning and three paris sliding |
| B. | All four pairs sliding |
| C. | Only two pairs turning and low pairs sliding |
| D. | Only three pairs turning and one pair sliding |
| E. | All four pairs turning |
| Answer» E. All four pairs turning | |
| 204. |
In the case of an automobile power is transmitted from the gear box to the differential through |
| A. | Bevel gears |
| B. | Hooke's joint |
| C. | Oldham's coupling |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Hooke's joint | |
| 205. |
The linear velocity of a point on a link relative to any other point on the link will be |
| A. | Along the line joining the two points |
| B. | Perpendicular to the line joining the two points |
| C. | Same as that of the end points of link |
| D. | Perpendicular to the lower end of the link |
| E. | None of the above |
| Answer» B. Perpendicular to the line joining the two points | |
| 206. |
A Peaucellier mechanism has |
| A. | Ten links |
| B. | Eight links |
| C. | Four links |
| D. | Twelve links |
| E. | Six links |
| Answer» B. Eight links | |
| 207. |
Two parallel shafts, the distance between whose axies is small and variable, may be connected by |
| A. | Knuckle joint |
| B. | Clutch arrangement |
| C. | Gear drive |
| D. | Oldham's coupling |
| E. | Universal joint |
| Answer» D. Oldham's coupling | |
| 208. |
Nominal top width of a B type V-belt is |
| A. | 13 mm |
| B. | 22 mm |
| C. | 32 mm |
| D. | 17 mm |
| E. | 31 mm |
| Answer» D. 17 mm | |
| 209. |
The number of nodes in shaft carrying only tow rotor at the ends will be |
| A. | An odd number |
| B. | One |
| C. | An even number |
| D. | Zero |
| E. | Two |
| Answer» B. One | |
| 210. |
Which of the following gear is not used on non-parallel, non-intersecting shafts? |
| A. | Bevel |
| B. | Worm |
| C. | Helical |
| D. | Hypoid |
| E. | All of the above |
| Answer» A. Bevel | |
| 211. |
In case of helical gears the angle between the plane containing the axes of the gear and plane passing through the pitch point is known as |
| A. | Lead angle |
| B. | Helix angle |
| C. | Pitch angle |
| D. | Pressure angle |
| E. | Axial pitch angle |
| Answer» B. Helix angle | |
| 212. |
In case of flat belt drive the length of belt in case of |
| A. | Open belt depends on sum of the diameters of pulleys |
| B. | Open belts depends on difference of the diameters of pulleys |
| C. | Cross belts depends on the sum of the diameters of pulleys |
| D. | Cross belts depends on the difference of the diameters of pulleys |
| E. | None of the above |
| Answer» C. Cross belts depends on the sum of the diameters of pulleys | |
| 213. |
The purpose of providing multiple collars on a flat collar pivot bearing is to |
| A. | Increase frictional resistance |
| B. | To establish self-sustaining bearing condition |
| C. | Distribute the frictional load because of limiting friction |
| D. | Distribute the axial load because of limiting bearing pressure on a collar |
| E. | None of the above |
| Answer» D. Distribute the axial load because of limiting bearing pressure on a collar | |
| 214. |
In an at tomobile the power is transmitted from gear box to differential through |
| A. | Universal joint |
| B. | Hooke's joint |
| C. | Kunckle join |
| D. | Oldham's coupling |
| E. | Bevel grars |
| Answer» B. Hooke's joint | |
| 215. |
In simple harmonic motion the acceleration is proportional to |
| A. | Displacement |
| B. | Linear velocity |
| C. | Angular velocity |
| D. | Rate of change of angular velocity |
| E. | None of the above |
| Answer» A. Displacement | |
| 216. |
Slip in belt drive is |
| A. | Loss of power |
| B. | Difference between the velocities of two pulleys |
| C. | Difference between the angular velocities of two pulleys |
| D. | Difference between the linear speed of the rim of pulley and the belt on it |
| E. | None of the above |
| Answer» D. Difference between the linear speed of the rim of pulley and the belt on it | |
| 217. |
Tangential acceleration direction is |
| A. | Along the angular velocity |
| B. | Perpendicular to the angular velocity |
| C. | Opposite to the angular velocity |
| D. | Any of (A) and (B) |
| E. | Any of (A) and (C) |
| Answer» E. Any of (A) and (C) | |
| 218. |
Kinematics of machines deals with |
| A. | Apparatus for applying mechanical power |
| B. | Number of inter-related parts |
| C. | The forces acting on the parts of the machine |
| D. | The relative motion between the parts, neglecting the consideration of the force |
| E. | None of the above |
| Answer» D. The relative motion between the parts, neglecting the consideration of the force | |
| 219. |
A shaft revolving in a bearing forms a |
| A. | Turning pair |
| B. | Lower pair |
| C. | Turning pair |
| D. | Higher pair |
| E. | Clindrical pair |
| Answer» B. Lower pair | |
| 220. |
In case of locomotives the percentage of primary forces balanced is generally |
| A. | 33 to 40 percent |
| B. | 40 to 50 percent |
| C. | 50 to 60 percent |
| D. | 60 to 70 percent |
| E. | None of the above |
| Answer» D. 60 to 70 percent | |
| 221. |
The belt drive can transmit maximum power when maximum total tension in belt equals |
| A. | Centrifugal tension |
| B. | Twise the centrifugal tension |
| C. | Thrice the centrifugal tension |
| D. | Four times the centrifugal tension |
| E. | None of the above |
| Answer» C. Thrice the centrifugal tension | |
| 222. |
The function of a governor is |
| A. | To control the engine speed |
| B. | To maintain the speed of engine constant |
| C. | To maintain constant piston speed of engine |
| D. | To maintain the speed of an engine within prescribed limits of varying load conditions |
| E. | None of the above |
| Answer» D. To maintain the speed of an engine within prescribed limits of varying load conditions | |
| 223. |
In case of spur gears the top land is |
| A. | The part of the tooth surface lying below the pitch surface |
| B. | The curve forming face and flank |
| C. | Radius that connects the root circle to the profile of the tooth |
| D. | The width of the gear tooth measured axially along the pitch surface |
| E. | The surface of the top of the tooth |
| Answer» E. The surface of the top of the tooth | |
| 224. |
The no of links in Hart mechanism is |
| A. | 8 |
| B. | 6 |
| C. | 5 |
| D. | 4 |
| E. | All of the above |
| Answer» B. 6 | |
| 225. |
In a slider crank mechanism for l/r ratio of 4 the percentage of stroke converted by piston corresponding to 90? movement of crank from top centre will be |
| A. | 0 percent |
| B. | Less than 50% |
| C. | More than 50% |
| D. | 100% |
| E. | None of the above |
| Answer» B. Less than 50% | |
| 226. |
The key generally used in wrist watches is |
| A. | Saddle key |
| B. | Sunk key |
| C. | Wood ruff key |
| D. | Tangent key |
| E. | None of the above |
| Answer» A. Saddle key | |
| 227. |
In case of involute the angular velocity ratio is |
| A. | Directly proportional to radius of base circle from which the involute was generated |
| B. | Inversely proportional to radius of base circle from which the involute was generated |
| C. | Directly proportional to the distance of the chord over which thread is unwound |
| D. | Inversely proportional to the distance of the chord over which thread is wound |
| E. | None of the above |
| Answer» B. Inversely proportional to radius of base circle from which the involute was generated | |
| 228. |
Which one of the following is not a spring controlled governor? |
| A. | Porter governor |
| B. | Hartnell governor |
| C. | Pickering governor |
| D. | None of the above |
| E. | None of the above |
| Answer» A. Porter governor | |
| 229. |
The purpose of differential in locmomtive is served by |
| A. | Shape of rails |
| B. | Taper on wheels |
| C. | Taper on rails |
| D. | Track contour |
| E. | Track curvature |
| Answer» B. Taper on wheels | |
| 230. |
The normal at any point of a involute is |
| A. | Also normal to that circle |
| B. | Tangent to the circle |
| C. | Is inclined to the normal to the circle at an angle equal to pressure angle |
| D. | Is inclined to the tangent to the circle at an angle equal to the pressure angle |
| E. | None of the above |
| Answer» B. Tangent to the circle | |
| 231. |
The number of links in Paucellier mechanism is |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| E. | None of the above |
| Answer» D. 8 | |
| 232. |
A point on a link connecting double slider crank chain will trace a (an) |
| A. | Straight line |
| B. | Parabola |
| C. | Ellipse |
| D. | Hyperbola |
| E. | Circle |
| Answer» C. Ellipse | |
| 233. |
The differential gear in the automobiles is used to |
| A. | Provide balancing |
| B. | Assist in changing speed |
| C. | Help in turning |
| D. | Provide jerk free movement of vehicle |
| E. | Reduce speed |
| Answer» C. Help in turning | |
| 234. |
The abbreviation P.I.V. drive system stands for |
| A. | Purely Integral Variance |
| B. | Positive Infinitely Variable |
| C. | Periodic Ideal Vibrationless |
| D. | Polar Inertia Vee belt |
| E. | Perfectly Induced Velocities |
| Answer» B. Positive Infinitely Variable | |
| 235. |
The Biflar susperision method is used to determine |
| A. | Position of balancing weights |
| B. | Centripetal acceleration |
| C. | Natural frequency of vibration |
| D. | Moment of inertia |
| E. | None of the above |
| Answer» D. Moment of inertia | |
| 236. |
A Scott-Russel mechanism consists of |
| A. | Turning and rotary pairs |
| B. | Turning pair only |
| C. | Sliding and turning pairs |
| D. | Sliding and rotary pairs |
| E. | Rotary pair only |
| Answer» C. Sliding and turning pairs | |
| 237. |
If three bodies have plane motions, their instantataneous centres |
| A. | Lie in different planes |
| B. | Lie in a plane perpendicular to the plane of motion |
| C. | Lie in the same plane as the plane of motion |
| D. | Lie on a straight line |
| E. | None of the above |
| Answer» D. Lie on a straight line | |
| 238. |
The prime circle of a cam is |
| A. | The smallest circle drawn to the pitch curve from the centre of rotation of curve |
| B. | The smallest circle drawn to the cam profile from the centre of rotation of a radial cam |
| C. | The circle with centre as the centre of cam axis and radius such that it passes through the pitch point |
| D. | The circle fitting in cam profile |
| E. | None of the above |
| Answer» A. The smallest circle drawn to the pitch curve from the centre of rotation of curve | |
| 239. |
A pulley in a belt drive acts as a |
| A. | Rolling pair |
| B. | Turning pair |
| C. | Surface pair |
| D. | Sliding pair |
| E. | Cylindrical pair |
| Answer» A. Rolling pair | |
| 240. |
In the gear box of an automobile, which gear train is used? |
| A. | Simple gear train |
| B. | Compound gear train |
| C. | Epicyclic gear train |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Compound gear train | |
| 241. |
The locus of a point one the circumference of a circle which rolls without slipping on a fixed straight line, is known as |
| A. | Involute |
| B. | Epicycloid |
| C. | Cycloid |
| D. | Hypocycloid |
| E. | None of the above |
| Answer» C. Cycloid | |
| 242. |
Stub tooth is |
| A. | Shorter than standard tooth depth |
| B. | Standard gear tooth |
| C. | Equivalent rack tooth |
| D. | Non-standard tooth |
| E. | Longer than standard tooth depth |
| Answer» A. Shorter than standard tooth depth | |
| 243. |
Which of the following road offers maximum resistance to automobiles? |
| A. | Wood paving |
| B. | Macadam |
| C. | Well rolled ground |
| D. | Loose sand |
| E. | None of the above |
| Answer» D. Loose sand | |
| 244. |
In case of worm and worm wheel, the maximum efficiency is obtained when |
| A. | Worm is driver |
| B. | Worm wheel is driver |
| C. | Either of the worm or worm wheel is a driver |
| D. | Depends on other factors |
| E. | None of the above |
| Answer» C. Either of the worm or worm wheel is a driver | |
| 245. |
In a balancing machine, the units for unbalance measurement are |
| A. | gm-cm-cps |
| B. | cps |
| C. | cm |
| D. | gram |
| E. | gm-cm |
| Answer» E. gm-cm | |
| 246. |
The type of teeth used on a gear used in sugar crushing is |
| A. | Hyperboild |
| B. | Semi-epicycloidal |
| C. | Involute |
| D. | Cycloidal |
| E. | Epicycloidal |
| Answer» D. Cycloidal | |
| 247. |
In a pin jointed mechanism, the line of thrust on a link is |
| A. | tangential to the friction circles at the ends |
| B. | along the friction axis |
| C. | inclined to axis of link by an angle ?, known as angle of friction |
| D. | All the above |
| E. | None of the above |
| Answer» D. All the above | |
| 248. |
In automobiles, Hooke's joint is used between |
| A. | Flywheel and clutch |
| B. | Clutch and gear box |
| C. | Gear box and differential |
| D. | Differential and wheels |
| E. | None of the above |
| Answer» C. Gear box and differential | |
| 249. |
A pair is termed as a higher pair when relative motion between two elements of the pair is |
| A. | partly sliding and partly turning |
| B. | rolling only |
| C. | Outer circle |
| D. | sliding only |
| E. | turning only |
| Answer» B. rolling only | |
| 250. |
The swaying couple in a locomotive is due to |
| A. | unbalanced primary forces |
| B. | unbalanced secondary forces |
| C. | partial balancing |
| D. | None of the above |
| E. | None of the above |
| Answer» C. partial balancing | |
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