ISRO Scientist or Engineer Mechanical 2016

Instructions

For the following questions answer them individually

Question 31

The main objective of ‘shot peening’ is to improve which property of metal parts

Video Solution

Question 32

When a material is strain hardened?

Video Solution

Question 33

Which thread is more suited in powerscrew to take load on both directions?

Video Solution

Question 34

A holeis specified as $$\phi 50^{\left(\frac{+0.050}{-0.000}\right)}$$ mm. The mating shaft has a clearance fit with minimum clearance of 0.02 mm. The tolerance on the shaft is 0.03 mm. Maximum clearance between hole and shaft is

Video Solution

Question 35

In a cutting operation the cutting speed was reduced by 20%. Assuming n = 0.5 and C = 350 in Taylor’s equation, the increasein toollife is

Video Solution

Question 36

Mass production of seamless tubes is by the process of

Video Solution

Question 37

Misrunis a casting defect which occurs due to

Video Solution

Question 38

A simple steam powercycle receives 100,000 kJ/min as heat transfer from hot combustion gases and rejects 66,000 kJ/min as heat transfer to the environment. If the pump power
required is 1400 kJ/min, the thermal efficiency of the cycle and turbine power output is

Video Solution

Question 39

Air at 100 kPa, $$2^\circ C$$ occupies a 10 liter piston-cylinder device that is arranged to maintain constant air pressure. This device is now heated until its volume is 20 liters. The work produced by the air is

Video Solution

Question 40

A heat engine working with a thermal efficiency of 35% receives 2 kW of heat from a furnace. The waste heat rejected from the engine is

Video Solution

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ISRO Scientist or Engineer Mechanical 2016

The main objective of ‘shot peening’ is to improve which property of metal parts

When a material is strain hardened?

Which thread is more suited in powerscrew to take load on both directions?

A holeis specified as $$\phi 50^{\left(\frac{+0.050}{-0.000}\right)}$$ mm. The mating shaft has a clearance fit with minimum clearance of 0.02 mm. The tolerance on the shaft is 0.03 mm. Maximum clearance between hole and shaft is

In a cutting operation the cutting speed was reduced by 20%. Assuming n = 0.5 and C = 350 in Taylor’s equation, the increasein toollife is

Mass production of seamless tubes is by the process of

Misrunis a casting defect which occurs due to

A simple steam powercycle receives 100,000 kJ/min as heat transfer from hot combustion gases and rejects 66,000 kJ/min as heat transfer to the environment. If the pump powerrequired is 1400 kJ/min, the thermal efficiency of the cycle and turbine power output is

Air at 100 kPa, $$2^\circ C$$ occupies a 10 liter piston-cylinder device that is arranged to maintain constant air pressure. This device is now heated until its volume is 20 liters. The work produced by the air is

A heat engine working with a thermal efficiency of 35% receives 2 kW of heat from a furnace. The waste heat rejected from the engine is

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A simple steam powercycle receives 100,000 kJ/min as heat transfer from hot combustion gases and rejects 66,000 kJ/min as heat transfer to the environment. If the pump power
required is 1400 kJ/min, the thermal efficiency of the cycle and turbine power output is