8. According Stefan-Boltzmann law, the total radiation from a black body per second per unit

area is fourth power of the absolute temperature.
(4) equal to (B) directly proportional to
(C) inversely proportional to (D) exponential to

9. Forging results in the following :
(ಗೌ) reduces the mechanical properties (18) improves the grain flow
(6) creates internal defeets (D) all of the above

10. In Electrical discharge machining :
(ಗಿ) the work piece and tool must both conduct electricity
(B) only the work piece conducts electricity
(C) வண்ட tool conducts electricity
(10) both tool and work piece should not conduct electricity

11. In a tensile test, necking starts at :
(ಗೆ) lower yield stress (18) upper yield stress
(0) ultimate tensile stress (10) just before fracture

12. The fatigue strength of mild steel is :
(A) equal to its tensile strength (B) more than its tensile strength
(0) equal to its yield strength (D) lower than its yield strength

13. The power transmitted by belt drive is designed on the basis of :
(A) angle of contact on the larger pulley
(B) angle of contact on the smaller pulley
(€) average angle of contact on the two pulleys
(10) angle of contact on the driver pulley, whether smaller or larger

14. Dynamometer is a device for measuring :
(ಯ) torque exerted by the machine
(0) power developed by the machine
(C) நண absorbed by the machine
(D) हो of the above

15. The type of gears used to connect two non-parallel non-intersecting shafts are :
(A) straight spur gears (B) straight bevel gears
(C) cross helical gears (D) spiral gears
85/2015 4 A