Select the correct statements about pile testing.

i. Kentledge pile loading test consists of steel beams set up, anchors, rigs and a hydraulic jack which is placed between the main beam and the head of the pile.

ii. The O-cell is placed in the bored pile and can be reused after the test has been carried out.

iii. Kentledge pile load test is cheaper than the O-cell test.

iv. O-Cell pile test can be used to evaluate pile friction and end bearing capacity depending on the O-Cell location.