List of top Mechanical Engineering Questions on Theory of Machines and Design

A slider sliding at 15 m/s on a link which is rotating at 30 r.p.m, is subjected to Coriolis acceleration of magnitude
A vertical double-acting steam engine develops 75 kW at 250 r.p.m. The maximum fluctuation of energy is 30 percent of the work done per stroke. The maximum and minimum speeds are not to vary more than 1 percent on either side of the mean speed. What is the approximate mass of the flywheel required? If the radius of gyration is 0.6 m.
The height of a Watt's governor is expressed as
The critical speed of a rotating shaft depends upon
Critical speed of a shaft depends upon its
If the rotating mass of a rim type flywheel is distributed on a second rim type flywheel whose mean radius is half the mean radius of the former, then the energy stored in the second flywheel at the same speed will be ------- times that of the first flywheel

Match List I with List II:

LIST I 
Mechanical Drive		LIST II 
Function
A. CamsI. Lock a mechanism when it is holding a load.
B. GearsII. Movement of one part relative to another with minimum friction and maximum accuracy.
C. RatchetsIII. Imparts a reciprocating or oscillatory motion to another body in contact.
D. BearingsIV. Transmission of rotary motion between parallel and inclined shafts.

Choose the correct answer from the options given below:

Three identical gears A B and C are used in power transmission. Gear A and C are input and output gears Gear B is an idler gear connecting A and C. The gear which is subjected to reversed nature of stress is
The type of brake in which frictional force assists in applying the brakes is termed as
An aeroplane is making a left turn as viewed by an observer from the rear of the plane The engine rotor of the plane are running in clockwise sense when viewed from the rear side The gyroscopic effects tend to
Given below are two statements:
Statement (I): Flywheels are used to control the fluctuations in speed of machines arising from external sources.
Statement (II): Governors are used to control the fluctuations in speed of machines arising from internal sources.
In light of the above statements, choose the most appropriate answer from the options given below.
Match List I with List II:
LIST ILIST II
A. Involute GearI. Variable Pressure Angle
B. Cycloidal GearII. Constant Pressure Angle
C. GyroscopeIII. Sensitivity
D. GovernorIV. Stability
Choose the correct answer from the options given below:
The instantaneous centre of a sliding body moving on a stationary curved surface lies at
In a slider crank mechanism for $ \frac{l}{4} $ ratio of 4, the percentage of stroke converted by the piston corresponding to 90° movement of the crank from top dead center is
The total reaction on the ground when wheels of the vehicle are subjected to the gyroscopic couple and the centrifugal force while negotiating the curve is
The point on the cam at which the pressure is maximum is known as:
For the specified flywheel design, the variation of the engine speed is from 210 rad/s to 190 rad/s. During the cycle process, the change in kinetic energy is found to be 400 N-m, then the moment of inertia of the flywheel in kg-m² is:
The extension due to self-weight of a bar of uniform cross section being hanged vertically downward is ___ times the extension produced by the same weight applied at the lower end of the vertical bar.
The relation between number of links $ (l) $ and number of joints $ (j) $ in a kinematic chain is generally
For a triple threaded screw, the lead is 30 mm and the mean diameter of the screw is 80 mm, then the pitch of the screw is
In a simple gear train, if the number of idler gears is odd, then the direction of motion of the driven gear will be:
Whirling speed of a shaft coincides with the natural frequency of its: