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## ISRO PAPER ON 28th DECEMBER 2008 AT CHENNAI

Started by ganeshbala, Mar 22, 2009, 03:09 AM

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#### ganeshbala

##### Mar 22, 2009, 03:09 AM
ISRO PAPER ON 28th DECEMBER 2008 AT CHENNAI

Written test pattern

1. What is characteristic gas constant
a) Cp / Cv b) Cp*Cv c) Cp-Cv d) Cp+Cv

2. If three pipes are in series having dia 450,550 and 650, and thier diameters are 200,250,300 respectively. If we replaced the three pipes with equivalent pipe have length 750 mm then what could be the diameter of the equivalent pipe.
Ans: To solve this problem caluculator is necesssary. The formula is Leqv/D5eqv = L1/D15+ L2/D25+ L3/D35 How we can calculate with out calculater.

3. A rod is subjected to 18000 Nm torque and max permissible shear stress is 60 N/mm2. Calculate the diameter of the Rod.

Ans: Torque T= (∏*D3*fs)/16

4. 10 questions are from Pshysics Ex: A car moving with a uniform acceleration covers 30mt in 5 sec. And next in 5 seconds covers 50 mt with another uniform acceleration. What is acceleration fo the car.

5. What is the parallel flow heat exchanger and answer are with Symbols of Temperature diagrams.

6. Some questions are from Production, Heat Transfer, FM, Metrology.

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