MCQOPTIONS
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MCQOPTIONS
This section includes 977 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. |
Power of a governor is the%! |
| A. | Mean force exerted at the sleeve for a given percentage change of speed |
| B. | Work-done at the sleeve for maximum equilibrium speed |
| C. | Mean force exerted at the sleeve for maximum equilibrium speed |
| D. | None of the above |
| Answer» E. | |
| 402. |
A mechanism consisting of four links is called a __________ mechanism.%! |
| A. | Simple |
| B. | Compound |
| C. | Binary |
| D. | None of these |
| Answer» B. Compound | |
| 403. |
The example of successfully constrained motion is a%! |
| A. | Motion of an I.C. engine valve |
| B. | Motion of the shaft between a footstep bearing |
| C. | Piston reciprocating inside an engine cylinder |
| D. | All of the above |
| Answer» E. | |
| 404. |
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be%! |
| A. | To dip the nose and tail |
| B. | To raise the nose and tail |
| C. | To raise the nose and dip the tail |
| D. | To dip the nose and raise the tail |
| Answer» D. To dip the nose and raise the tail | |
| 405. |
For a kinematic chain to be considered as mechanism%! |
| A. | Two links should be fixed |
| B. | One link should be fixed |
| C. | None of the links should be fixed |
| D. | There is no such criterion |
| Answer» C. None of the links should be fixed | |
| 406. |
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO, the acceleration of the piston is _________ when the crank OC and connecting rod PC are at right angles to each other.%! |
| A. | Infinity |
| B. | Zero |
| C. | Any +ve value |
| D. | Any -ve value |
| Answer» C. Any +ve value | |
| 407. |
The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is%! |
| A. | Along PO |
| B. | Perpendicular to PO |
| C. | At 45° to PO |
| D. | None of the above |
| Answer» E. | |
| 408. |
Rectilinear motion of piston is converted into rotary by%! |
| A. | Cross head |
| B. | Slider crank |
| C. | Connecting rod |
| D. | Gudgeon pin |
| Answer» C. Connecting rod | |
| 409. |
A Hartnell governor is a%! |
| A. | Dead weight governor |
| B. | Pendulum type governor |
| C. | Spring loaded governor |
| D. | Inertia governor |
| Answer» D. Inertia governor | |
| 410. |
The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon is represented by the line%! |
| A. | Joining the corresponding points |
| B. | Perpendicular to line as per (A) |
| C. | Not possible to determine with these data |
| D. | At 45° to line as per (A) |
| Answer» B. Perpendicular to line as per (A) | |
| 411. |
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines%! |
| A. | The algebraic sum of the primary forces must be equal to zero |
| B. | The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 412. |
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.%! |
| A. | Inner edge |
| B. | Outer edge |
| C. | Corners |
| D. | None of these |
| Answer» B. Outer edge | |
| 413. |
The partial balancing means%! |
| A. | Balancing partially revolving masses |
| B. | Balancing partially reciprocating masses |
| C. | Best balancing of engines |
| D. | All of these |
| Answer» C. Best balancing of engines | |
| 414. |
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that%! |
| A. | Governor A is more sensitive than governor B |
| B. | Governor B is more sensitive than governor A |
| C. | Both governors A and B are equally sensitive |
| D. | None of the above |
| Answer» B. Governor B is more sensitive than governor A | |
| 415. |
In a single slider crank chain%! |
| A. | Each of the four pairs is a turning pair |
| B. | One is a turning pair and three are sliding pairs |
| C. | Two are turning pairs and two are sliding pairs |
| D. | Three are turning pairs and one is a sliding pair |
| Answer» E. | |
| 416. |
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r‚ÇÅ and r‚ÇÇ = External and internal radii of collar respectively)%! |
| A. | (1/2) μ W (r₁ + r₂) |
| B. | (2/3) μ W (r₁ + r₂) |
| C. | (1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] |
| D. | (2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)] |
| Answer» B. (2/3) ≈í¬∫ W (r‚Äö√á√Ö + r‚Äö√á√á) | |
| 417. |
The lower pair is a%! |
| A. | Open pair |
| B. | Closed pair |
| C. | Sliding pair |
| D. | Point contact pair |
| Answer» C. Sliding pair | |
| 418. |
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called%! |
| A. | Dedendum |
| B. | Addendum |
| C. | Clearance |
| D. | Working depth |
| Answer» B. Addendum | |
| 419. |
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.%! |
| A. | Sum |
| B. | Difference |
| C. | Product |
| D. | Ratio |
| Answer» E. | |
| 420. |
The dynamic friction is the friction experienced by a body, when the body%! |
| A. | Is in motion |
| B. | Is at rest |
| C. | Just begins to slide over the surface of the other body |
| D. | None of the above |
| Answer» B. Is at rest | |
| 421. |
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to%! |
| A. | Reduce vibration |
| B. | Reduce slip |
| C. | Ensure uniform loading |
| D. | Ensure proper alignment |
| Answer» D. Ensure proper alignment | |
| 422. |
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is%! |
| A. | 5,367 r.p.m. |
| B. | 6,000 r.p.m. |
| C. | 9,360 r.p.m. |
| D. | 12,000 r.p.m. |
| Answer» B. 6,000 r.p.m. | |
| 423. |
Angular acceleration of a link can be determined by dividing the%! |
| A. | Centripetal component of acceleration with length of link |
| B. | Tangential component of acceleration with length of link |
| C. | Resultant acceleration with length of link |
| D. | All of the above |
| Answer» C. Resultant acceleration with length of link | |
| 424. |
In a hydrodynamic journal bearing, there is%! |
| A. | A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing |
| B. | A thick film of lubricant between the journal and the bearing |
| C. | No lubricant between the journal and the bearing |
| D. | A forced lubricant between the journal and the bearing |
| Answer» C. No lubricant between the journal and the bearing | |
| 425. |
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force%! |
| A. | The reaction on me inner wheels increases and on the outer wheels decreases |
| B. | The reaction on the outer wheels increases and on the inner wheels decreases |
| C. | The reaction on the front wheels increases and on the rear wheels decreases |
| D. | The reaction on the rear wheels increases and on the front wheels decreases |
| Answer» C. The reaction on the front wheels increases and on the rear wheels decreases | |
| 426. |
In a Hartnell governor, the lift of the sleeve is given by (where r‚ÇÅ and r‚ÇÇ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)%! |
| A. | (r‚ÇÅ + r‚ÇÇ) (y/x) |
| B. | (r‚ÇÅ + r‚ÇÇ) (x/y) |
| C. | (r‚ÇÅ - r‚ÇÇ) (y/x) |
| D. | (r‚ÇÅ - r‚ÇÇ) (x/y) |
| Answer» D. (r‚Äö√á√Ö - r‚Äö√á√á) (x/y) | |
| 427. |
In the two rotor system as shown in the below figure (I‚ÇÅ < I‚ÇÇ), a node of vibration is situated%! |
| A. | Between I‚ÇÅ, and I‚ÇÇ but nearer I‚ÇÅ |
| B. | Between I‚ÇÅ, and I‚ÇÇ but nearer to I‚ÇÇ |
| C. | Exactly in the middle of the shaft |
| D. | Nearer to I‚ÇÅ but outside |
| Answer» C. Exactly in the middle of the shaft | |
| 428. |
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.%! |
| A. | More than |
| B. | Less than |
| C. | Same as |
| D. | None of these |
| Answer» C. Same as | |
| 429. |
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)%! |
| A. | P = W tan α |
| B. | P = W tan (α + φ) |
| C. | P = W (sin α + μ cos α) |
| D. | P = W (cos α + μ sin α) |
| Answer» D. P = W (cos ≈í¬± + ≈í¬∫ sin ≈í¬±) | |
| 430. |
A point on a connecting link (excluding end points) of a double slider crank mechanism traces a%! |
| A. | Straight line path |
| B. | Hyperbolic path |
| C. | Parabolic path |
| D. | Elliptical path |
| Answer» E. | |
| 431. |
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has%! |
| A. | 2 links |
| B. | 3 links |
| C. | 4 links |
| D. | 5 links |
| Answer» D. 5 links | |
| 432. |
The sensitiveness of the governor __________ as the speed range decreases.%! |
| A. | Remains unaffected |
| B. | Decreases |
| C. | Increases |
| D. | None of these |
| Answer» D. None of these | |
| 433. |
In a pantograph, all the pairs are%! |
| A. | Turning pairs |
| B. | Sliding pairs |
| C. | Spherical pairs |
| D. | Self-closed pairs |
| Answer» B. Sliding pairs | |
| 434. |
Transmission angle is the angle between%! |
| A. | Input link and coupler |
| B. | Input link and fixed link |
| C. | Output link and coupler |
| D. | Output link and fixed link |
| Answer» D. Output link and fixed link | |
| 435. |
The centre of gravity of a coupler link in a four bar mechanism will experience%! |
| A. | No acceleration |
| B. | Only linear acceleration |
| C. | Only angular acceleration |
| D. | Both linear and angular acceleration |
| Answer» E. | |
| 436. |
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.%! |
| A. | Equal to |
| B. | Directly proportional to |
| C. | Inversely proportional to |
| D. | Independent of |
| Answer» D. Independent of | |
| 437. |
A pantograph is a mechanism with%! |
| A. | Lower pairs |
| B. | Higher pairs |
| C. | Rolling pairs |
| D. | Turning pairs |
| Answer» B. Higher pairs | |
| 438. |
If the pressure angle is __________, a reciprocating follower will jam in its bearings.%! |
| A. | Small |
| B. | Too small |
| C. | Large |
| D. | Too large |
| Answer» E. | |
| 439. |
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is%! |
| A. | 95 mm |
| B. | Slightly less than 95 mm |
| C. | Slightly more than 95 mm |
| D. | 45 mm |
| Answer» C. Slightly more than 95 mm | |
| 440. |
Cylindrical cams can be classified as%! |
| A. | Circular |
| B. | Tangent |
| C. | Reciprocating |
| D. | None of the above |
| Answer» E. | |
| 441. |
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is%! |
| A. | Flexible coupling |
| B. | Universal coupling |
| C. | Chain coupling |
| D. | Oldham's coupling |
| Answer» C. Chain coupling | |
| 442. |
The locus of a point on a thread unwound from a cylinder will be%! |
| A. | A straight line |
| B. | A circle |
| C. | Involute |
| D. | Cycloidal |
| Answer» D. Cycloidal | |
| 443. |
A cam mechanism imparts following motion%! |
| A. | Rotating |
| B. | Oscillating |
| C. | Reciprocating |
| D. | All of the above |
| Answer» E. | |
| 444. |
Davis steering gear consists of%! |
| A. | Sliding pairs |
| B. | Turning pairs |
| C. | Rolling pairs |
| D. | Higher pairs |
| Answer» B. Turning pairs | |
| 445. |
*$_The example of successfully constrained motion is a? |
| A. | Motion of an I.C. engine valve |
| B. | Motion of the shaft between a footstep bearing |
| C. | Piston reciprocating inside an engine cylinder |
| D. | All of the above |
| Answer» E. | |
| 446. |
*$_A mechanism consisting of four links is called a __________ mechanism.? |
| A. | Simple |
| B. | Compound |
| C. | Binary |
| D. | None of these |
| Answer» B. Compound | |
| 447. |
*$_Which of the following statements regarding laws governing the friction between dry surfaces are correct?? |
| A. | The friction force is dependent on the materials of the contact surfaces. |
| B. | The friction force is directly proportional to the normal force. |
| C. | The friction force is independent of me area of contact. |
| D. | All of the above |
| Answer» E. | |
| 448. |
*$_Power of a governor is the? |
| A. | Mean force exerted at the sleeve for a given percentage change of speed |
| B. | Work-done at the sleeve for maximum equilibrium speed |
| C. | Mean force exerted at the sleeve for maximum equilibrium speed |
| D. | None of the above |
| Answer» E. | |
| 449. |
*$_The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be? |
| A. | To dip the nose and tail |
| B. | To raise the nose and tail |
| C. | To raise the nose and dip the tail |
| D. | To dip the nose and raise the tail |
| Answer» D. To dip the nose and raise the tail | |
| 450. |
*$_A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force? |
| A. | The reaction on me inner wheels increases and on the outer wheels decreases |
| B. | The reaction on the outer wheels increases and on the inner wheels decreases |
| C. | The reaction on the front wheels increases and on the rear wheels decreases |
| D. | The reaction on the rear wheels increases and on the front wheels decreases |
| Answer» C. The reaction on the front wheels increases and on the rear wheels decreases | |