Online Mechanical Engineering Test - Theory of Machines Test 1

The partial balancing of reciprocating parts in locomotives produces

Maximum fluctuation of energy in a flywheel is equal to (where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, C_S = Coefficient of fluctuation of speed, and ω = Mean angular speed = )

If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be

When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be

In vibration isolation system, if ω/ω_n > 2, then for all values of damping factor, the trans-missibility (i.e. the ratio of the force transmitted to the force applied) will be less than unity.

The coriolis component of acceleration leads the sliding velocity by

The minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be

The length of a simple pendulum which gives the same frequency as the compound pendulum, is

A Hartnell governor is a

The unbalanced force due to revolving masses

A slender shaft supported on two bearings at its ends carries a disc with an eccentricity e from the axis of rotation. The critical speed of the shaft is N_c. If the disc is replaced by a second one of same mass but mounted with an eccentricily 2 e, then the critical speed of the shaft in the second case is

The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

The angle of inclination of the plane, at which the body begins to move down the plane is called

When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

The Klein's method of construction for reciprocating engine mechanism

Power of a governor is the

Under logarithmic decrement, the amplitude of successive vibrations are

The centre of suspension and centre of percussion are not interchangeable.

Efficiency of a screw jack is given by

The primary unbalanced force of reciprocating masses is inversely proportional to the crank radius.