Q. In a gear having involute teeth, the normal to the involute is a tangent to the

View solution

Q. A body is said to be under forced vibrations, when

View solution

Q. The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)

View solution

Q. The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing)

View solution

Q. The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

View solution

Q. If the damping factor for a vibrating system is unity, then the system will be

View solution

Q. In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the trans-missibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)

View solution

Q. When a point at the end of a link moves with constant angular velocity, its acceleration will have

View solution

Q. The time taken by a particle for one complete oscillationis known as periodic time.

View solution

Q. The danger of breakage and vibration is maximum

View solution

Q. The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the lengm of connecting rod to radius of crank)

View solution

Q. For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

View solution

Q. The component of the acceleration, parallel to the velocity of the particle, at the given instant is called

View solution

Q. In a multiple V-belt drive, if one of the belt is broken, then we should replace

View solution

Q. Most of the engines, generally, do not require balancing of secondary forces and couples.

View solution

Q. The secondary unbalanced force is maximum __________ in one revolution of the crank.

View solution

Q. A spring controlled governor is found unstable. It can be made stable by

View solution

Q. In order to have a good grip on the pulley, the V-belt should touch the bottom of the groove in the pulley.

View solution

Q. In order to double the period of a simple pendulum, the length of the string should be

View solution

Q. When a slider moves on a fixed link having curved surface, their instantaneous centre lies

View solution