10.

11.

A refrigerator and a heat pump operate between the same temperature limits. The coefficient
of performance of the pump is 4, Then COP of the refrigerator will be

(@ 3 ¢) 4
L 9 (ಗ) 6
An adiabatic process is the one in which 4
(च) No heat gain or loss for the working substance
(b) The temperature of the working substance changes

9) The change in internal energy equals mechanical work done

(d) All of the above

A single stage rocket is launched vertically from rest with its thrust programmed to give the
rocket.a constant upward acceleration of 5 m/s% If the fuel is exhausted 10 seconds after the
launch, the maximum altitude reached by the rocket (assuming g = 9.8 71/82) 18

(घ) 240 ‏طط‎ (0) 250 का

( 377.55 पा (d) 357.55m

The power transmitted by the belt is maximum when the relation between maximum tension
(T) and centrifugal tension (7) 18

@ T=T: 0) T=05T.
2) ۴< ‏۰ھ‎ (6) T=3T.
Cold working is carried out at
(8) Room 09110078006 ↴ ↸≹↴∎↕∏⊝⋅⇂↖⊐∇⊧⋅⋯∁⇂⊏⋅∎⋯≣ temperature

(८) Below recrystallisation temperature (6) Below 150°C

In a binary alloy system of A and B liquid phase एव 40% A (60% B) 18 coexisting with गास्‌
7856 ೦1 80% A(20%B). For an overall composition of 4.5% the weight fraction of liquid phase
(೪7) ೫6 80116 phase(Ws) of A

(घ) 0.875 Wi, and 0.125 Ws (b) 0.80 Ws and 0.20 प्रा,
(८) 0.60 Wrand 0.40 Ws (ಗ) 0.36 Ws and 0.64 Wy,
2 78/2015