Which of the following generating machine will offer constant voltage on all loads?
1). Self-excited generator
2). Separately excited generator
3). Level compound generator
4). All of the above
Average age of nine males is 12, and the average age of x number of females is 13.The average age of both males and females is 12.5. Find the number of females
1). 14
2). 12
3). 9
4). 10
If \(x + \frac{1}{x} = - 2\) then the value of \({x^{2n + 1}} + \frac{1}{{{x^{2n + 1}}}}\) where n is a positive integer, is
1). 0
2). 2
3). -2
4). -5
By which process does the blood get filtered in the kidney?
1). Pumping
2). Osmosis
3). Emulsion
4). Propagation
There are 4 letters and 4 envelopes. In how many ways can wrong choices be made?
1). 43
2). 4! – 1
3). 16
4). 44 – 1