A bench and no load! Whatever you are testing has no load. It might be a generator or a motor for example. If a motor it wouldn't be connected to anything. If a generator it would have nothing plugged in.
The test equipment needs two test leads to find the resistance in a circuit.
You have take some training to learn how to perform the ekg on patients. When you qualify and pass this test that make you eligible to work with patients.
I assume "tension" in this question should be replaced with "voltage". Short circuit tests are often performed from the lower voltage side of the transformer, since a lower voltage source is then required to perform the test. Often times the test lab may not have a source that can output a high enough voltage to perform from the high voltage winding.
magnetising current test, magnetising balance test, s.c test, vector group test, winding resistance test, ratio test
On installed transformer a test is performed to check weather it has any oil leakage or not, the test is called pressure test, more precisely pressure leakage test.