IQ tests

While reading I. Asimov i came across the chapter on Mensa where the author states that there were two reasons he didnt want to give the Mensa IQ test - The first being that he was scared . Its a loss - loss situation for him and the second that such tests are set up to judge one facet of your intelligence by people who are good at the same facet of intelligence and ask questions which only judge that facet.
While i share the first fear ( I have never taken an IQ test , and of the two interviews given on the campus i flunked one and got shortlisted for the other, though i think that was more to do with my engineering grades than any of my answers) I dont think the author goes far enough in the condemnation of such tests.
So whether cream is denser than milk(true/false) Or Asked while cooking if you too much salt how do you recover the dish , which do you think takes more intelligence? or
How many days will it take for all the blue eyed people to jump into the ocean(given a complex set of rules) or how do you get a six year old who is more interested in the TV to read books?
or
given a set of geometrical shapes and asked to predict the next shape from a. b. c. or d. Or how do you get people to stop believing in the illogicalities of religion?
You can of course go on and on of the thorough uselessness of the Mensa - Ish questions