Theory of Machine Which of the following statements regarding laws governing the friction between dry surfaces are correct? The friction force is independent of me area of contact. The friction force is directly proportional to the normal force. All of these The friction force is dependent on the materials of the contact surfaces. The friction force is independent of me area of contact. The friction force is directly proportional to the normal force. All of these The friction force is dependent on the materials of the contact surfaces. ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Davis steering gear consists of Rolling pairs Turning pairs Higher pairs Sliding pairs Rolling pairs Turning pairs Higher pairs Sliding pairs ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine 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 I ω ωP (1/2). I ω ωP (1/2).Iω² Iω² I ω ωP (1/2). I ω ωP (1/2).Iω² ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base) sinφ + sinα = b/c cotφ - cotα = c/b tanφ + cotα = b/c cosφ - sinα = c/b sinφ + sinα = b/c cotφ - cotα = c/b tanφ + cotα = b/c cosφ - sinα = c/b ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is 95 mm Slightly more than 95 mm Slightly less than 95 mm 45 mm 95 mm Slightly more than 95 mm Slightly less than 95 mm 45 mm ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The danger of breakage and vibration is maximum Below the critical speed Near the critical speed Above the critical speed None of these Below the critical speed Near the critical speed Above the critical speed None of these ANSWER DOWNLOAD EXAMIANS APP
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