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What type of chain is not connected to the frame?
Answer
Correct Answer:
Floating link
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In what way does a flexible link transmit motion?
Answer
Correct Answer:
Partly deformed
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What is a link called that does not undergo any deformation while transmitting motion?
Answer
Correct Answer:
Rigid
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What does a link called rigid not undergo while transmitting motion?
Answer
Correct Answer:
Deformation
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What are the bodies that make up a link?
Answer
Correct Answer:
Resistant
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What is the function of a Link?
Answer
Correct Answer:
Connecting other parts which have motion relative to it
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What is the term for this type of part?
Answer
Correct Answer:
Element
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What is the purpose of a machine?
Answer
Correct Answer:
Transforms energy available in one form or another to do the desired work
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What does the machine transform?
Answer
Correct Answer:
Energy available in one form or another
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What motion does the link have that makes it difficult to attach it to the ground?
Answer
Correct Answer:
Complex
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What does the link not have?
Answer
Correct Answer:
Attached to ground
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What type of rocking motion does a rocker have?
Answer
Correct Answer:
Oscillatory motion
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What sort of motion does a rocke rhave when pivoted to the ground?
Answer
Correct Answer:
Oscillatory
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If a crank is pivoted to ground, it makes what kind of revolutions?
Answer
Correct Answer:
Complete
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What determines the length of a crank's stroke?
Answer
Correct Answer:
Ground
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What is a ground?
Answer
Correct Answer:
Any link or links that are fixed, nonmoving with respect to the reference frame
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What are links that are fixed, nonmoving with respect to the reference frame called?
Answer
Correct Answer:
Ground
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What type of machine is designed to do work?
Answer
Correct Answer:
Mechanism
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What does a machine do?
Answer
Correct Answer:
Work
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What is the name of the chain's type?
Answer
Correct Answer:
Grounded kinematic Chain
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What type of movement is the chain's movement?
Answer
Correct Answer:
Grounded kinematic
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What is another term for a kinematic chain?
Answer
Correct Answer:
Links joined together for motion
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What are some of the links that make up a kinematic chain?
Answer
Correct Answer:
Joined together for motion
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What does the term "Joint order" refer to?
Answer
Correct Answer:
The number of links joined minus one
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What does the term "force-closed joint" mean?
Answer
Correct Answer:
Requires some external force to keep the links together
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What does a force-closed joint require?
Answer
Correct Answer:
Some external force to keep the links together
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What is a form-closed joint?
Answer
Correct Answer:
One in which the links are kept together form
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How many degrees of freedom does a half joint have?
Answer
Correct Answer:
Two
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What are full joints called?
Answer
Correct Answer:
Lower pairs
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What type of contact is in a lower pair?
Answer
Correct Answer:
Surface contact
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What is a higher pair of contacts called?
Answer
Correct Answer:
Point or line contact
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A connection between two or more links is called what?
Answer
Correct Answer:
A joint
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What are joints called when they connect two or more links?
Answer
Correct Answer:
Kinematic pair
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What kind of motion is a simultaneous combination of?
Answer
Correct Answer:
Rotation and translation
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What is the motion that is a combination of rotation and translation?
Answer
Correct Answer:
Complex motion
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What is a complex motion?
Answer
Correct Answer:
A simultaneous combination of rotation and translation
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What type of path does the body describe in a pure translation?
Answer
Correct Answer:
Parallel
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What does a body that has one point that does not move have?
Answer
Correct Answer:
Rotation
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All other points move in what shape?
Answer
Correct Answer:
Circular arcs
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Bicycle has a chain to provide what?
Answer
Correct Answer:
Torque
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What is another simple example of a kinematic system that contains a chain drive to provide torque?
Answer
Correct Answer:
Bicycle
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What is the term for a device that moves?
Answer
Correct Answer:
Machine
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Machines that move contain what?
Answer
Correct Answer:
Kinematic elements
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What do mechanisms typically provide in a machine?
Answer
Correct Answer:
Significant forces and transmit significant power
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Machine: typically contains mechanisms that are designed to provide significant forces and transmit significant what?
Answer
Correct Answer:
Power
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What is a mechanism?
Answer
Correct Answer:
A device that transforms motion to some desirable pattern
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What type of device transforms motion to some desirable pattern?
Answer
Correct Answer:
Mechanism
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The term "kinetics" refers to the study of what subject?
Answer
Correct Answer:
Forces on systems in motion
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What is the study of forces on systems in motion?
Answer
Correct Answer:
Kinetics
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What is kinematics the study of?
Answer
Correct Answer:
Position, displacement, rotation, speed, velocity, and acceleration
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What is the study of position, displacement, rotation, speed, velocity, and acceleration?
Answer
Correct Answer:
Kinematics
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Kinematics is the study of what?
Answer
Correct Answer:
Motion
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What field is the study of motion without regard to forces?
Answer
Correct Answer:
Kinematics
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Kinematics involves studying motion without regard to what?
Answer
Correct Answer:
Forces
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A kinematic chain must have at least
Answer
Correct Answer:
Four links and four turning pairs
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A cycle chain is a kinematic chain
Answer
Correct Answer:
No
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A V belt designated as C 3048/120 will have
Answer
Correct Answer:
Approximately 120 inch inside length
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The engine of an aeroplane rotates in a clockwise direction when seen from the tail end and the aeroplane takes a turn towards left. The effect of gyroscopic couple on aeroplane is
Answer
Correct Answer:
To raise the nose and dip the tail
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A belt drive is
Answer
Correct Answer:
Not a positive drive
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The type of governor used in record players for adjusting the speed of turntable generally is
Answer
Correct Answer:
Pickering governor
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The moment of friction with the assumption of uniform wear to uniform pressure is
Answer
Correct Answer:
Lower
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For speed reduction in the ratio of 100 the type of gear preferred is
Answer
Correct Answer:
Worm and worm wheel
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Can simple band brake be made self-energising type
Answer
Correct Answer:
No
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Klien's construction gives graphical construction for
Answer
Correct Answer:
Both of above
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A governor is said to be stable when
Answer
Correct Answer:
There is one radius of the governor weights for each equilibrium speed
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The maximum efficiency of a screw jack provided with square threads and angle of friction 30? will be
Answer
Correct Answer:
33%
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Which of the following is a centrifugal type governor?
Answer
Correct Answer:
Hartnell governor
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In Locomotive operation, the swaying couple results due to
Answer
Correct Answer:
Primary disturbing force
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Hammer blow in locomotives results in
Answer
Correct Answer:
Tendency to lift wheel from rails
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In case of gears, the module is
Answer
Correct Answer:
The length of the pitch circle diameter per tooth
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The rotor of a ship rotates in anticlockwise direction when viewed from the bow end and the ship takes a left turn. The effect of gyroscopic couple on the ship is
Answer
Correct Answer:
To raise the bow and lower then stern
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In case of involute gears
Answer
Correct Answer:
Pressure angle is constant throughout the teeth engagement
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Which of the following oil has the highest specific gravity?
Answer
Correct Answer:
Castor oil
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If a particle of a link has a velocity when changes both in magnitude and direction at any instant, then
Answer
Correct Answer:
It must have two components of acceleration e.g. centripetal, and tangential
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The vibrations in which the restoring forces are not proportional to the displacements and the first power of velocity are known as
Answer
Correct Answer:
Bearing vibrations
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Which of the following is a higher pair?
Answer
Correct Answer:
E. None of the above
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In case of balancing problems pertaining to locomotives, the resultant unbalanced force is minimum when
Answer
Correct Answer:
Half of the reciprocating masses are balanced by rotating masses
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If a machine uses four V belts, while purchasing care should be taken to ensure that
Answer
Correct Answer:
All above
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A shaft having one end fixed has a disc oscillating freely at the other enIf the shaft stiffness, increases the natural frequency of vibrations will
Answer
Correct Answer:
Increase
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The pulley in a belt drive acts as
Answer
Correct Answer:
Rolling pair
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A dadial follower is
Answer
Correct Answer:
One in which the follower translates along an axis passing through the cam centre of rotation
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In the elliptical trammel mechanism, the midpoint of the link connecting the two sliders traverses
Answer
Correct Answer:
A circular path
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Klein's construction can be used when
Answer
Correct Answer:
E. (A) and (C) above
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Dynamic of machines deals with
Answer
Correct Answer:
The forces acting on the parts of the machine
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In case of spur gears the profile is
Answer
Correct Answer:
The curve forming face and flank
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The spring constant k of a coil-spring is
Answer
Correct Answer:
E. directly proportional to the square of the number of coils in the spring
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Coriorli's component of acceleration exists whenever a point moves along a path that has
Answer
Correct Answer:
Rotational motion
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In case of hypoid gears the mutual position of shafts will be
Answer
Correct Answer:
Non-parallel, non-intersecting
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Which of the following gears is free from axial thrust
Answer
Correct Answer:
Herringbone gears
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The number of forks provided in a Hooke's joint is
Answer
Correct Answer:
Two
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The mass moment of inertia is
Answer
Correct Answer:
The resistance to angular acceleration
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Coriolis component is encountered in
Answer
Correct Answer:
Quick return mechanism
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Pitch of gears is expressed by
Answer
Correct Answer:
Any of the above
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In a cam and follower mechanism, for the uniform velocity of the followers the displacement curve will have
Answer
Correct Answer:
Constant slope
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V-belts with E type cross-section are generally used in
Answer
Correct Answer:
Heavy duty machines
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Identify the incorrect statement if any
Answer
Correct Answer:
In case of free vibrations the external force is applied at the ends only
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Ackermann steering gear consists of
Answer
Correct Answer:
Turning pair
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In case of cross-helical worm the axes of two shafts are
Answer
Correct Answer:
Non-parallel-non intersecting
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A pulley in a belt-drive acts as a
Answer
Correct Answer:
Wrapping pair
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A cylindrical type cam is one
Answer
Correct Answer:
With circumferential contour cut in the surface of the cylinder which rotates about its axis
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The effect of creep in case of cross-belt drive is
Answer
Correct Answer:
To reduce the speed of the driven pulley and consequently reduce the power output
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Slip in turning belt is
Answer
Correct Answer:
Zero
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A reverted gear train is one is which
Answer
Correct Answer:
The first and last gear are on the same shaft
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The advantages of involute profile over cycloidal are given below. Identify if there is any incorrect statement
Answer
Correct Answer:
The interference is inherently absent in this system
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