ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2014

In order to have maximum powerfrom a Pelton turbine, the bucket speed must be

The alloying element mainly used to improve the endurancestrength ofsteel materials is

The percentage improvement in powercapacity of a flat belt drive, when the wrap angle at the driving pulley is increased from $$150^\circ$$ to $$210^\circ$$ by an idler arrangement fora friction coefficient of 0.3 is

In an interchangeable assembly, shaft of size $$25.000_{-0.01}^{+0.04}$$ mm. mates with a hole of size $$25.000_{-0.02}^{+0.03}$$ mm. Maximum interference in micronsin the assembly is

A column has a rectangular cross section of 10 $$\times$$ 20 mm and a length of 1m. The slenderness ratio of the columnis close to

A thin cylinder of inner radius 500 mm and thickness 10mm is subjected to an internal pressure of 5 MPa. The average hoop stress in MPa is

A circular disk of uniform thickness 20 mm, radius 200 mm and mass 20 kg is used as flywheel. If it rotates at 600 rpm, kinetic energy of flywheel in Joule is

A vibration system consists of a mass of 175 kg, a spring stiffness 700 N/cm and damper with a damping coefficient of 7 N cm$$^{-1}$$ sec. Damping factor of the system is

Two cutting tools are being compared for a machining operation. The tool life equations are Carbide tool : $$VT^{1.6} = 3000$$; HSS tool : $$VT^{0.6} = 200$$, where V is the cutting speed in m/min and T is tool life in min. The carbide tool will provide higher tool life, if the cutting speed in m/min exceeds

The diameter of suction side of a reciprocating compressor compared to its delivery side is