480 Important Theory of Machines MCQ Question and Answer | PDF Free Download
1.The critical speed of a shaft depends upon its
- AMass
- BStiffness
- CMass and stiffness
- DStiffness and eccentricity
2.The Klein's method of construction for reciprocating engine mechanism
- AIs based on acceleration diagram
- BIs a simplified form of instantaneous center method
- CUtilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine
- DEnables determination of Cariole?s component
3.A cam mechanism imparts following motion
- ARotating
- BOscillating
- CReciprocating
- DAll of the above
4.A foot step bearing and rotor of a vertical turbine form examples of
- AIncompletely constrained motion
- BPartially constrained motion
- CCompletely constrained motion
- DSuccessfully constrained motion
5.A friction circle is a circle drawn when a journal rotates in a bearing. Its radius depends upon the coefficient of friction and the
- AMagnitude of the forces on journal
- BAngular velocity of journal
- CClearance between journal and bearing
- DRadius of journal
6.Which of the following mechanism is obtained from lower pair?
- AGyroscope
- BPantograph
- CValve and valve gears
- DAll of the above
7.Ackermann steering gear consists of
- ASliding pairs
- BTurning pairs
- CRolling pairs
- DHigher pairs
8.Davis steering gear consists of
- ASliding pairs
- BTurning pairs
- CRolling pairs
- DHigher pairs
9.The axis of precession is __________ to the plane in which the axis of spin is going to rotate.
- AParallel
- BPerpendicular
- CBoth A and B
- DNone of these
10.In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be
- ALess sensitive
- BMore sensitive
- CUnaffected of sensitivity
- DIsochronous
11.When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be
- AStable
- BUnstable
- CIsochronous
- DNone of these
12.Governor is used in automobile to
- ADecrease the variation of speed
- BMaximize the fuel economy
- CLimit the vehicle speed
- DMaintain constant engine speed
13.If the pressure angle is __________, a reciprocating follower will jam in its bearings.
- ASmall
- BToo small
- CLarge
- DToo large
14.The Coriolis component of acceleration is taken into account for
- ASlider crank mechanism
- BFour bar chain mechanism
- CQuick return motion mechanism
- DAll of these
15.Critical damping is a function of
- AMass and stiffness
- BMass and damping coefficient
- CMass and natural frequency
- DDamping coefficient and natural frequency
16.Which of the following is a lower pair?
- ABall and socket i
- BPiston and cylinder
- CCam and follower
- DBoth (A) and (B) above
17.The D-slide valve is also known as
- AInside admission valve
- BOutside admission valve
- CPiston slide valve
- DNone of these
18.A circular bar moving in a round hole is an example of
- AIncompletely constrained motion
- BPartially constrained motion
- CCompletely constrained motion
- DSuccessfully constrained motion
19.A universal joint is an example of
- AHigher pair
- BLower pair
- CRolling pair
- DSliding pair
20.An automobile steering gear is an example of
- ASliding pair
- BRolling pair
- CLower pair
- DHigher pair