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McqMate
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 |
251. |
Bearing suitable for fluctuating loads is |
A. | Ball bearing |
B. | Needle roller bearing |
C. | Sleeve bearing |
D. | Bush bearing |
E. | Roller bearing |
Answer» B. Needle roller bearing |
252. |
Radial distance from the top to the pitch circle for a tooth is known as |
A. | working depth |
B. | dedendum |
C. | addendum |
D. | None of the above |
E. | None of the above |
Answer» C. addendum |
253. |
Higher pressure angle results in |
A. | Narrow base and weaker teeth |
B. | Weaker teeth |
C. | Non-uniform motion transmission |
D. | Bigger size of gear teeth |
E. | Wider base and stronger teeth |
Answer» E. Wider base and stronger teeth |
254. |
In a radial cam with a roller on follwer the prime circle can be defined as |
A. | the smallest circle tangent to the pitch curve |
B. | the smallest circle tangent to the cam profile |
C. | a circle drawn with radius equal to the distance between the pitch point and the centre of base circle |
D. | None of the above |
E. | None of the above |
Answer» A. the smallest circle tangent to the pitch curve |
255. |
Identify the incorrect statement in case of cycloidal gears |
A. | No lubrication needed |
B. | Interference does not exist |
C. | Have less wear |
D. | Interference exists |
E. | Ease in transmitting variable loads |
Answer» D. Interference exists |
256. |
Which one of the following is not applicable to involute profile |
A. | The angular velocity ratio when tow involutes are in mesh, is inversely proportional to the size of the base circles |
B. | No involute has a pressure angle until it is brought in contact with other mating involute |
C. | Involute is the only tooth form that is not sensitive to centre distance of their base circles |
D. | The shape of the involute profile is dependent only on the dimensions of the base circle |
E. | The pitch diameters of mating involutes are inversely proportional to their base circle diameters |
Answer» E. The pitch diameters of mating involutes are inversely proportional to their base circle diameters |
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