The axis of precession is __________ to the plane in which the axis of spin is going to rotate. None of these Perpendicular Both A and B Parallel TRUE ANSWER : ? YOUR ANSWER : ?
In a four bar chain or quadric cycle chain Each of the four pairs is a turning pair Two are turning pairs and two are sliding pairs One is a turning pair and three are sliding pairs Three are turning pairs and one is a sliding pair TRUE ANSWER : ? YOUR ANSWER : ?
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be Hunt Isochronous Unstable Stable TRUE ANSWER : ? YOUR ANSWER : ?
The Coriolis component of acceleration is taken into account for Quick return motion mechanism Four bar chain mechanism All of these Slider crank mechanism TRUE ANSWER : ? YOUR ANSWER : ?
The example of lower pair is Automobile steering gear Shaft revolving in a bearing All of these Straight line motion mechanisms TRUE ANSWER : ? YOUR ANSWER : ?
The secondary 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 length of connecting rod to radius of crank) m.ω².r cosθ m.ω².r (sin 2θ/n) m.ω².r (cos 2θ/n) m.ω².r sinθ TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following governor is used to drive a gramophone? Pickering governor Porter governor Watt governor Hartnell governor TRUE ANSWER : ? YOUR ANSWER : ?
The lead screw of a lathe with nut forms a Turning pair Rolling pair Sliding pair Screw pair TRUE ANSWER : ? YOUR ANSWER : ?
The advantage of the piston valve over the slide valve is that in the former case Wear is less Power absorbed is less The pressure developed being high provides tight sealing Both wear and power absorbed are low TRUE ANSWER : ? YOUR ANSWER : ?
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin) Iω² (1/2).Iω² (1/2). I ω ωP I ω ωP TRUE ANSWER : ? YOUR ANSWER : ?