ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015
For the following questions answer them individually
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 71
300 kJ/s of heat is supplied at constant temperature of 500 k to a heat engine. The heat rejection takes place at 300 K. The following results are obtained (a) 210 kJ (b) 180 kJ
(c) 150 kJ. Identify whether result is a reversible cycle, irreversible cycle or impossible cycle respectively
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 72
If cube root of unity are $$1, w, w^2$$ then the roots of equation $$(x - 1)^3 + 8 = 0$$ are
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 73
If $$1, w, w^2$$ are cube roots of unity then the value of
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 74
Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probability that all the three apply for the same house is
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 75
The rank of the matrix $$A = \begin{bmatrix}-2 & 4 & 2\\3 & -4 & -1\\4 & -3 & 1 \end{bmatrix}$$ is
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 76
If $$3e^x \tan ydx + (1 - e^x) \sec^2 ydy = 0$$, then $$y$$ is
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 77
Which of the following represents a wave equation?
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 78
$$1 + \frac{x^2}{2!} + \frac{x^4}{4!} + \frac{x^6}{6!} + .........$$ stands for
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 79
$$\int \sec x dx$$ is
ISRO Scientist or Engineer Refrigeration & Air-Conditioning 2015 - Question 80
Inverse Laplace transform of $$\frac{S}{S^2} + a^2$$ is
