Q. When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

View solution

Q. The equation of motion for a vibrating system with viscous damping is , if the roots of the equation are __________ then the system will be under damped.

View solution

Q. The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be

View solution

Q. A mechanism is an assemblage of

View solution

Q. In a simple harmonic motion, the velocity vector with respect to displacement vector

View solution

Q. When a point moves along a straight line, its acceleration will have

View solution

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

View solution

Q. The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

View solution

Q. The mechanism forms a structure, when the number of degrees of freedom (n) is equal to

View solution

Q. The sense of coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

View solution

Q. The condition for correct steering of a Davis steering gear is (where α = Angle of inclination of the links to the vertical)

View solution

Q. The frequency of oscillation of a torsional pendulum is

View solution

Q. A governor is said to be isochronous when range of speed is zero for all radii of rotation of the balls within the working range, neglecting friction.

View solution

Q. An overdamped system, when disturbed from the equilibrium position, will not cross the equilibrium position.

View solution

Q. The efficiency of a screw jack is dependent upon the load raised or lowered.

View solution

Q. The instantaneous centres, which moves as the mechanism moves but joints are of permanent nature, are called permanent instantaneous centres.

View solution

Q. A pair is said to be a kinematic pair, if the relative motion between them is completely or successfully constrained.

View solution

Q. The pitching of a ship is assumed to take place with simple harmonic motion.

View solution

Q. The natural frequency of free transverse vibrations due to uniformly distributed load acting over a simply supported shaft is (where δS = Static deflection of simply supported shaft due to uniformly distributed load)

View solution

Q. A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force

View solution