Engineering Services Exam- Mechanical Engineering Set 3

In a mechanism, the number of Instantaneous centres (I-centres) N is

A shaft of span 1 m and diameter 25 mm is simply supported at the end. It carriers a 1.5 Kn concentrated load at mid-span. If E is 200 GPa, its fundamental frequency will be nearly

A vibrating system consists of mass of 50 kg, a spring with a stiffness of 30 kN/m and a damper. If damping is 20% of the critical value, the natural frequency of damped vibrations will be

A refrigerator unit having a mass of 35 kg is to be supported on three springs, each having spring stiffness s. The unit operates at 480 rpm. If only 10% of the shaking force is allowed to transmit to the supporting structure, the value of stiffness will be nearly

In which one of the following tooth profiles, does the pressure angle remain constant throughout the engagement of teeth?

If the axes of the first and last wheels of a compound gear coincide, it is called

In a reciprocating engine, the force along the connecting rod FQ is

For a single cylinder reciprocating engine speed is 500 rpm, stroke is 150 mm, mass of reciprocating parts is 21 kg; mass of revolving parts is 15 kg at crank radius. If two-thirds of reciprocating masses and all the revolving masses are balanced, the mass at a radius of 150 mm will be

If the axes of the rolling of the ship and of the stabilizing rotor are parallel, it will result in