31. Copper is not present as an alloying constituent in
32. Kinematic viscosity of water as compared to that of air is
33. Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience.
34. __________ test can be termed as the semi-distructive test.
35. A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is
36. The weight of a body at the centre of the earth is
37. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by $$\frac{{{{\text{T}}_1} - {{\text{T}}_2}}}{{{{\text{T}}_1}}}.$$ The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by
38. Lead is poured into the joint between two __________ pipes.
39. Lead is poured into the joints between two __________ pipes.
40. Free oxygen is removed from boiler feed water, because it
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