Most Latest Competitive Mechanical Engineering MCQs – Theory Of Machines MCQs
This post is comprising of latest ” Theory Of Machines MCQs Latest – Competitive Mechanical Engineering MCQs “. Here you’ll get latest mechanical engineering mcqs for written test, interview with answers. If you want to improve your knowledge regarding mechanical engineering then read these mcqs of Design of Steel Structures.
Latest Mechanical Engineering MCQs
By practicing these MCQs of Mechanical Engineering MCQs – Theory Of Machines Mcqs, an individual for exams performs better than before. This post comprising of mechanical engineering objective questions and answers related to “Theory Of Machines“. As wise people believe “Perfect Practice make a Man Perfect”. It is therefore practice these mcqs of mechanical engineering to approach the success. Tab this page to check “Latest Theory Of Machines Mcqs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others.
Latest Theory Of Machines Mcqs
The most occurred mcqs of Theory Of Machines in past papers. Past papers of Theory Of Machines Mcqs. Past papers of Theory Of Machines Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Theory Of Machines Mcqs. The Important series of Theory Of Machines Mcqs are given below:
The locus of a point on a thread unwound from a cylinder will be___________________?
A. a circle
B. a straight line
C. involute
D. cycloidal
E. helix
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimidstroke respectively, is__________________?
A. maximum and zero
B. minimum and maximum
C. zero and maximum
D. zero and minimum
E. maximum and minimum
To obviate axial thrust, following gear drive is used_____________________?
A. double helical gears having opposite teeth
B. mutter gears
C. single helical gear in which one of the teeth of helix angle a is more
D. double helical gears having identical teeth
E. none of the above
If D1 and D2 be the diameters of driver and driven pulleys, then belt speed is proportional to__________________?
A. D2/D1
B. D1/D2
C. D1-D2.
D. D1
E. D1+D2
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use__________________?
A. spiral gear
B. spur gear
C. bevel gear
D. worm gear
E. crown gear
Which of the following is false statement in respect of differences between machine and structure___________________?
A. Machines transmit mechanical work, whereas structures transmit forces
B. Machines are run by electric motors, but structures are not
C. Machines modify movement and work, whereas structures modify forces
D. Efficiency of machines as well as structures is below 100%
E. In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures
Typewriter constitutes__________________?
A. structure
B. machine
C. mechanism
D. inversion
E. none of the above
A point on a link connecting double slider crank chain traces a____________________?
A. circle
B. straight line
C. parabola
D. hyperbola
E. ellipse
Kinematic pairs are those which have__________________?
A. elements of pairs not held together mechanically
B. surface contact between the two ele-ments when in motion
C. point or line contact between the two elements when in motion
D. two elements that permit relative mo-tion
E. none of the above
Lower pairs are those which have___________________?
A. two elements that permit relative motion
B. surface contact between the two elements when in motion
C. elements of pairs not -held together mechanically
D. point or line contact between the two elements when in motion
E. none of the above
A panto graph is a mechanism with___________________?
A. lower pairs
B. rolling pairs
C. higher pairs
D. turning pairs
E. spherical pairs
If the opposite links of a four bar linkage are equal, the links will always form a_________________?
A. rectangle
B. triangle
C. parallelogram
D. pentagon
E. trapezoid
The approximate straight line mechanism is a____________________?
A. four bar linkage
B. 8 bar linkage
C. 6 bar linkage
D. 3 bar linkage
E. 5 bar linkage
Peaucellier mechanism has__________________?
A. eight links
B. four links
C. six links
D. twelve links
E. five links
Production Technology Mcqs
A chain comprises of 5 links having 5 joints. Is it kinematic chain ?
A. it is a marginal case
B. no
C. yes
D. data are insufficient to determine it
E. unpredictable
For a kinematic chain to be considered as mechanism___________________?
A. none of the links should be fixed
B. one link should be fixed
C. two links should be fixed
D. there is no such criterion
E. none of the above
A cam mechanism imparts following motion___________________?
A. oscillating
B. rotating
C. reciprocating
D. all of the above
E. none of the above
Whitworth quick return mechanism is obtained by inversion of___________________?
A. slider crank mechanism
B. five link mechanism
C. kinematic chain
D. roller cam mechanism
E. none of the above
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
A. Watt mechanism
B. Grasshopper mechanism
C. Peaucellier’s mechanism
D. Tchabichiff mechanism
E. Ackermann mechanism
A kinematic chain requires at least________________________?
A. 3 links and 4 turning pairs
B. 2 links and 3 turning pairs
C. 4 links and 4 turning pairs
D. 5 links and 4 turning pairs
E. none of the above
The following is the inversion of slider crank chain mechanism______________________?
A. hand pump
B. Whitworth quick return mechanism
C. oscillating cylinder engine
D. all of the above
E. none of the above
A typewriter mechanism has 7 number of binary joints, six links and none of higher pairs. The mechanism is________________?
A. kinematically sound
B. data is not sufficient to determine same
C. soundness would depend upon which link is kept fixed
D. not sound
E. none of the above
In above example, the minimum length of the coupler will be__________________?
A. 95 mm
B. slightly less than 45 mm
C. slightly more than 45 mm
D. 45 mm
E. none of the above
For simple harmonic motion of the of follower, a cosine curve represents___________________?
A. velocity diagram
B. displacement diagram
C. acceleration diagram
D. all of the above
E. none of the above
The frequency of oscillation at compared to earth will be___________________?
A. 6 times less
B. 6 times more
C. 2.44 times more
D. 2.44 times,less
E. 36 times less
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?
A. less
B. same
C. more
D. data are insufficient to determine same
E. none of the above
Which is the false statement about the properties of instantaneous center____________________?
A. the two rigid links have no linear velocities relative to each other at the instantaneous centre
B. at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
C. the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
D. the double centre can be denoted either by 02 or Ol2, but proper selection should be made
E. none of the above
The number of links and instantaneous centers in a reciprocating engine mechanism are ___________________?
A. 4, 4
B. 5, 4
C. 4, 5
D. 6, 4
E. 4, 6
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. not possible to determine with these data
C. perpendicular to line as per A.
D. at 45° to line as per A.
E. none of the above
In a rigid link OA, velocity of A w.r.t. will be___________________?
A. at 45° to OA
B. perpendicular to OA
C. parallel to OA
D. along AO
E. along OA
Angular acceleration of a link can be determined by dividing the___________________?
A. resultant acceleration with length of link
B. tangential component of acceleration with length of link
C. centripetal component of acceleration with length of link
D. all of the above
E. none of the above
The direction of Corioli’s component of acceleration is the direction _____________________?
A. of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link
B. along tangential acceleration
C. along the centripetal acceleration
D. along perpendicular to angular velocity
E. none of the above.
Hydraulic Mechanics Mcqs
The magnitude of tangential acceleration is equal to____________________?
A. (velocity/crankradius)
B. velocityvcrankradius
C. velocity2 x crank radius
D. velocity x crank radius2
E. none of the above
Corioli’s component is encountered in_________________?
A. quick return mechanism of shaper
B. slider crank mechanism
C. four bar chain mechanism
D. A. and C. above
E. all of the above.
Klein’s construction can be used to determine acceleration of various parts when the crank is at_________________?
A. outer dead centre
B. inner dead centre
C. right angles to the link of the stroke
D. at 45° to the line of the stroke
E. all of the above
Corioli’s component acts________________?
A. perpendicular to sliding surfaces
B. unpredictable
C. somewhere in between above two
D. along sliding surfaces
E. none of the above
Klein’s construction can be used when_________________?
A. crank has a uniform angular velocity
B. crank has uniform angular acceleration
C. crank has non-uniform velocity
D. crank has uniform angular velocity and angular acceleration
E. there is no such criterion
The pressure angle of a cam depends upon___________________?
A. lift of follower
B. offset between centre lines of cam and follower
C. angle of ascent
D. sum of radii of base circle and roller follower
E. all of the above
Angle of ascent of cam is defined as the angle___________________?
A. through which the cam rotates during the period in which the follower remains in highest position
B. of rotation of the cam for a definite displacement of the follower
C. during which the follower returns to its initial position
D. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
E. moved by the cam from beginning oi ascent to the termination of descent
Angle of action of cam is defined as the angle ____________________?
A. through which the cam rotates during the period in which the follower remains in the highest position
B. of rotation of the cam for a definite displacement of the follower
C. during which the follower returns to its initial position
D. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
E. moved by the cam from beginning of ascent to the termination of descent
Cam angle is defined as the angle_________________?
A. through which, the cam rotates during the period in which the follower remains in the highest position
B. of rotation of the cam for a definite displacement of the follower
C. during which the follower returns to its initial position
D. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
E. moved by the can from beginning of i ascent to the termination of descent
Angle of dwell of cam is defined as the angle________________?
A. during which the follower returns to its initial position
B. of rotation of the cam for definite dis¬placement of the follower
C. through which the cam rotates during the period in which the follower remains in the highest position
D. moved by the cam from a beginning of ascent to the termination of descent
E. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
Angle of descent of cam is defined as the angle__________________?
A. during which the follower returns to its initial position
B. of rotation of the cam for a definite displacement of the follower
C. moved by the cam from the instant the follower begins to rise, till it reaches its highest position
D. through which the cam rotates during the period in which the follower remains in the highest position
E. moved by the cam from beginning of ascent to the termination of descent
For the same lift and same angle of ascent, a smaller base circle will give_______________?
A. something else
B. a large value of pressure angle
C. there is no such relation with pressure angle
D. a small value of pressure angle
E. none of the above is true
Cylindrical cams can be classified as_________________?
A. tangent
B. circular
C. reciprocating
D. all of the above
E. none of the above
A circle passing through the pitch point with its center at the center of cam axis is known as___________________?
A. base circle
B. pitch circle
C. prime circle
D. outer circle
E. cam circle
Cam size depends upon__________________?
A. base circle
B. prime circle
C. pitch circle
D. outer circle
E. none of the above
The maximum value of the pressure angle in case of cam is kept as________________?
A. 14°
B. 10°
C. 20°
D. 30°
E. 25°.
Klein’s construction is useful to determine__________________?
A. displacement of various parts
B. acceleration of various parts
C. velocity of various parts
D. angular acceleration of various parts
E. all of the above
The sense of Corioli’s component is such that it_________________?
A. leads the sliding velocity vector by 90°
B. is along the sliding velocity vector
C. lags the sliding velocity vector by 90°
D. leads the sliding velocity vector by 180°
E. none of the above
The number of centers in a crank driven slider crank mechanism are_______________?
A. 4
B. 2
C. 0
D. 6
E. may be any number depending upon position of mechanism
Klein’s construction gives a graphica construction for________________?
A. velocity polygon
B. slider-crank mechanism
C. acceleration polygon
D. four bar chain mechanism
E. angular acceleration
Tangential acceleration direction is_________________?
A. opposite to angular velocity
B. along the angular velocity
C. may be any one of these
D. perpendicular to angular velocity
E. none of the above
In a shaper mechanism, the Corioli’s component of acceleration will_______________?
A. unpredictable
B. exist
C. depend on position of crank
D. not exist
E. none of the above
Corioli’s component of acceleration exists whenever a point moves along a path that has________________?
A. tangential acceleration
B. rotational motion
C. linear displacement
D. centripetal acceleration
E. none of the above
The absolute acceleration of any point P in a link about center of rotation 0 is___________________?
A. perpendicular to PO
B. along PO
C. at 45° to PO
D. along OP
E. none of the above
Two systems shall be dynamically equivalent when____________________?
A. e.g. of two coincides
B. the mass of two are same
C. M.I. of two about an axis through e.g. is equal
D. all of the above
E. none of the above
According to Kennedy’s theorem, if three bodies have plane motions, their instantaneous centers lie on___________________?
A. a point
B. a triangle
C. two lines
D. a straight line
E. a curve
Machine Design Mcqs
Instantaneous center of rotation of a link in a four bar mechanism lies on _______________?
A. lift side pivot of this link
B. right side pivot of this link
C. a point obtained by intersection on extending adjoining links
D. can’t occur
E. none of the above
The Bifilar suspension method is used to determine__________________?
A. position of balancing weights
B. natural frequency of vibration
C. moment of inertia
D. centripetal acceleration
E. angular acceleration of a body
Polar moment of inertia (IP) of ac disc is to ht determined by suspen by a wire and noting the frequei oscillations (f) ?
A. Ipocf
B. Ipocf
C. Ip oc j
D. Ipoc-
E. none of the above
In S.H.M., the velocity vector w.r.t. displacement vector _________________?
A. leads by 90°
B. leads by 180°
C. lags by 90°
D. are in phase
E. could be anywhere.
In S.H.M., acceleration is proportional to _________________?
A. rate of change of velocity
B. displacement
C. velocity
D. all of the above
E. none of the above
Inertia force acts___________________?
A. along the direction of accel* force
B. perpendicular to the accel< force
C. opposite to the direction of ace ing force
D. in any direction w.r.t. accel* force depending on the magnit two
E. none of the above
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. 45 mm
B. slightly less than 95 mm
C. slightly more than 95 mm
D. 95 mm
E. none of the above
Kinematic pairs are those which have___________________?
A. two elements having Coroili’s com-ponent
B. two elements having relative motion
C. two elements held together mechani-cally
D. minimum of two instantaneous centres
E. all of the above
In a darg link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is _______________?
A. greater than sum of other two
B. equal to sum of other two
C. less than sum of other two
D. there is no such relationship
E. none of the above
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links_________________?
A. will remain same
B. will not occur
C. could change or remain unaltered depending oh which link is fixed
D. will change
E. none of the above
In its simplest form, a cam mechanism consists of following number of links___________________?
A. 2
B. 1
C. 3
D. 4
E. none
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. 3 links
B. 2 links
C. 4 links
D. 5 links
E. none of the above
The main disadvantage of the sliding pair is that it is_________________?
A. wears rapidly
B. bulky
C. difficult to manufacture
D. A. and B. above
E. A. and C. above
Hart mechanism has________________?
A. four links
B. six links
C. eight links
D. twelve links
E. five links
“Open pairs are those which have__________________?
A. point or line contact between the two elements when in motion
B. two elements that permit relative motion
C. elements of pairs not held together mechanically
D. surface contact between the two ele-ments when in motion
E. none of the above
A cam with a roller follower would con stitute following type of pair______________?
A. open pair
B. higher pair
C. lower pair
D. close pair
E. cam pair
Higher pairs are those which have_________________?
A. point or line contact between the two elements when in motion
B. elements of pairs not held together mechanically
C. surface contact between the two ele-ments when in motion
D. two elements that permit relative motion
E. none of the above