**NPTI Mechanical Model Papers.**

National Power Training Institute (NPTI) 2019 For NPTI Mechanical Model Question Papers 2019 NPTI Mechanical Model Sample Question papers NPTI Mechanical Model Mock Test Question Paper for 2019 Exam, This NPTI Mechanical Model Question are based on the syllabus but here some of the question may out of syllabus, just for your better exam NPTI Mechanical Model Exam preparation.

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** 1 Stokes theorem connects**

A) a line integral and a surface integral

B) a surface integral and a volume integral

C) a line integral and a volume integral

D) gradient of a function and its surface integral

Answer: (A)

**2 A solar collector receiving solar radiation at the rate of 0.6 k W/m2 transforms it to the internal energy of a fluid at an overall efficiency of 50%. The fluid heated to 350 K is used to run a beat engine which rejects heat at 313 K. If the heat engine is to deliver 2.5 kW power, the minimum area of the solar collector required would be A) 8.33rn2 **

B) 16.66rn2

C) 39.68m2

D) 79.36m2

Answer: (D)

** 3 When the temperature of a solid metal increases,**

A) strength of the metal decreaes but ductility increases

B) both strength and ductility of the metal decrease

C) both strength and ductility of the metal increase

D) strength of the metal increases but ductility decreases

Answer : (A)

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