BPSC Non Cadre Written Exam Questions for Mechanical Engineers (2016)

• What are the advantages and disadvantages of two strokes over four stroke cycle engine?  

• What is meant by octane number of a fuel? 

• What is the thermal efficiency of a standard Otto cycle for a compression ratio of 5.5? 

• What is priming of a centrifugal pump? How it is done? 

• What is the function of air vessel in a reciprocating pump?

• What is NPSH?

• A turbine develops 10000 KW under ahead of 25m at 135 rpm. What is the specific speed?

• How steam boiler is classified? Differentiate between water tube and fire tube boiler.

• What are the main objectives of producing draught in a boiler?

• What is the function of safety valve and economizer in boiler?

• Differentiate among allowance, tolerance and clearance.

• Describe any taper turning method used in lathe.

• Why tempering is done for steel and describe how it is done.

• What is the difference between refrigeration and air conditioning?

• Discuss the vapor absorption refrigeration system with neat sketch.

• A condenser of refrigeration system rejects heat at the rate of 120 KW while its compressor consumes a power of 30 KW. What is the COP of the System?

• What are the difference between Otto cycle and Diesel cycle?

• Calculate the modulus of elasticity for a material which produces the following data when undergoing test: Applied load=35.7 KN, Cross section area= 25 mm², Gauge length= 28 mm, Extension =0.2 mm

• If PVo= constant, then what is the name of the process?

• What are the difference between Oscillation and vibration? 

• What are the difference between engine and machine?