1- When a cable carries multiple currents, all in the same direction, this would be associated with which coupling mode? Select one: A. Differential mode B. Common mode C. Antenna mode

D. Common impedance E. None of the above 2- Interference at the source can be reduced by: Select one: A. Low noise design B. Shielding C. Decoupling D. Filtering E. All of the above 3- Shielding for magnetic fields at low frequency can be done with: Select one: A. Purely conductive material B. Aluminium C. Copper D. A high-permeability material such as mu-metal or its derivatives E. B & C 4- In hazardous areas, one would be more inclined to consider Select one: A. both the upper and lower explosive limit B. the lower explosive limit C. the upper explosive limit D the upper flammable limit 5- An instrument is to be mounted in a hazardous area. If it is marked T2" (maximum surface temperature of 300°C). Select one: A. it is safe to be used with gasses and vapours that have an ignition temperature greater than 300°C. B. it is safe to be used with gasses and vapours that have an ignition temperature lower that 300°C. C it can only be used with gasses and vapours whose ignition temperature is 300°C. D. it is unsafe as it gets too hot 6- ATEX 100a European Directive deals solely with Select one: A. the minimum requirements for improving the safety and health protection of workers potentially at risk from an explosive atmosphere B. the zone classification of a hazardous area C equipment and protective systems intended for use in potentially explosive atmospheres D. the IEC Standard to which equipment is certified 7- Who, generally speaking, is held responsible for the appropriate explosion protection safety of any given installation? Select one: A. The installer B. The equipment supplier C. The certifying authority D. The plant owner 8- HAZOPS work best if they are conducted Select one: A. when the P&IDs have been finalised, but before detailed design has commenced B. at any time. They are not influenced by P&IDs C. over beer and pretzels D. before the P&IDs have started 9- Which of the following listed certificate numbers would be for an equipment which has special conditions for installation of operation? Select one: A. BASOSATEX1234 U B. PTB07ATEX1784X C. SIRA09ATEX0645/1 D. CESI08ATEX1323