451. In a mechanism, the fixed instantaneous centres are those centres which September 13, 2025 by Admin remain in the same place for all configurations of the mechanism vary with the configuration of the mechanism moves as the mechanism moves, but joints are of permanent nature none of the above ✅ The correct answer is option A.
452. A Porter governor is a September 13, 2025 by Admin pendulum type governor dead weight governor spring loaded governor inertia governor ✅ The correct answer is option B.
453. The motion between a pair which takes place in __________ is known as incompletely constrained motion. September 13, 2025 by Admin one direction only more than one direction ✅ The correct answer is option B.
454. 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. September 13, 2025 by Admin Yes No ✅ The correct answer is option A.
455. The danger of breakage and vibration is maximum September 13, 2025 by Admin below the critical speed near the critical speed above the critical speed none of these ✅ The correct answer is option B.
456. The velocity of the belt for maximum power is (where m = Mass of the belt in kg per metre length) September 13, 2025 by Admin ✅ The correct answer is option C.
457. An overdamped system, when disturbed from the equilibrium position, will not cross the equilibrium position. September 13, 2025 by Admin Right Wrong ✅ The correct answer is option A.
458. In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks) September 13, 2025 by Admin ✅ The correct answer is option D.
459. In a multiple V-belt drive, if one of the belt is broken, then we should replace September 13, 2025 by Admin the broken belt only all the belts the broken belt and the belts on either side of it none of the above ✅ The correct answer is option B.
460. In a radial cam, the follower moves September 13, 2025 by Admin in a direction perpendicular to the cam axis in a direction parallel to the cam axis in any direction irrespective of the cam axis along the cam axis ✅ The correct answer is option A.