Macmahon's Mobile Plant Mechanic Competition Question Title * 1. Please provide your contact details Name Address Address 2 City/Town Postal Code Email Address Phone Number Question Title * 2. What is your trade certificate title and what year was it issued? Question Title * 3. All entrants must provide a copy of their trade certificate, comp@macmahon.com.au to be eligible to participate in the competition. Please select yes to confirm you have conformed to this requirement. (Certificate will be verified if you are short listed). Yes No Question Title * 4. Are you employed full time as a plant mechanic in the mining industry? Yes No Question Title * 5. Are you on the tools daily? Yes No Question Title * 6. Are you available to complete aspects of this competition on Sunday 22nd of March 2020? Yes No Question Title * 7. I have been qualified for Less than 5 Years 5 to 10 Years More than 10 Years Question Title * 8. If an imperial bolt measures 9.525mm across the shank, it is? 5/16 3/8 13/16 Question Title * 9. What is the temperature rise in an engine cooling system when at full load? 15 to 18 degrees Celsius 18 to 32 degrees Celsius 6 to 8 degrees Celsius Question Title * 10. PWM = Power Work Mode? Yes No Question Title * 11. A 15 amp globe in a 24 volt circuit will? Decrease voltage to 16 volts Increase resistance in the circuit Decrease resistance in the circuit Question Title * 12. If we increase hydraulic cylinder head-end surface area (larger diameter cylinder)? We can lift a heavier load with the same pressure The cylinder speed will be faster The ground speed will increase Question Title * 13. Three helical gears running in line, in mesh. Gear A has 25 teeth and rotates @100rpm in a clockwise direction. Gear B has 75 teeth and gear C has 50 teeth. Clockwise Anti-Clockwise Sinusoidal 33.33 rpm 50 rpm 75 rpm 125 rpm A - What direction is gear C rotating? A - What direction is gear C rotating? Clockwise A - What direction is gear C rotating? Anti-Clockwise A - What direction is gear C rotating? Sinusoidal A - What direction is gear C rotating? 33.33 rpm A - What direction is gear C rotating? 50 rpm A - What direction is gear C rotating? 75 rpm A - What direction is gear C rotating? 125 rpm B - What is the speed of gear C? B - What is the speed of gear C? Clockwise B - What is the speed of gear C? Anti-Clockwise B - What is the speed of gear C? Sinusoidal B - What is the speed of gear C? 33.33 rpm B - What is the speed of gear C? 50 rpm B - What is the speed of gear C? 75 rpm B - What is the speed of gear C? 125 rpm C - What is the speed of gear B? C - What is the speed of gear B? Clockwise C - What is the speed of gear B? Anti-Clockwise C - What is the speed of gear B? Sinusoidal C - What is the speed of gear B? 33.33 rpm C - What is the speed of gear B? 50 rpm C - What is the speed of gear B? 75 rpm C - What is the speed of gear B? 125 rpm Question Title * 14. TPS = Transmission Pressure Sensor? Yes No Question Title * 15. What is the Torque setting for a 3/8 UNC grade 8 bolt? 28 lb/ft 33 ft/lb 36 ft/lb Question Title * 16. Two 12 volt batteries wired in series will produce 24 volts? Yes No Question Title * 17. The direction of current flow in a diode is towards the band? Yes No Question Title * 18. Traction control speed sensors are located on the torque converter output Yes No Question Title * 19. Insite/ET are hydraulic test tools? Yes No Question Title * 20. The purpose of a one way clutch in a torque converter stator is to? Allow high ground speed at light loads Decrease ground speed at light loads Increase torque multiplication at light loads Question Title * 21. Maximum air filter restriction for a large diesel engine is? 5 to 15 in / h2o 15 to 20 in / h2o 20 to 30 in / h2o 29 kpa Question Title * 22. If an engine sensor has a supply of 5 volts is it digital? Yes No Question Title * 23. 35 API diesel has more BTU’s of heat energy than an 45 API diesel? Yes No Question Title * 24. Does a battery produce Hydrofluoric gas when charged? Yes No Question Title * 25. The refrigerant state from the TX valve to the evaporator is? High pressure low temp vapour Low pressure low temp liquid Low pressure high temp vapour Question Title Calculating power in an electrical circuit Question Title * 26. Complete the following statements: A - How much power is consumed in the above circuit? B - Power consumption is expressed in? C - Write the formula for calculating power in a dc circuit. Question Title Mechanical Advantage Question Title * 27. The cylinders above are numbered 1 to 4 from left to right.- Cylinder 4 has a surface area of 2 square inches- Cylinder 3 has a surface area of 5 square inches- The load on cylinder 1 is 450 lbs. A - What is the pressure in the Circuit? B - What is the surface area of cylinder #1? C - What is the weight on cylinder #3? D - What is the surface area of cylinder #2? Question Title * 28. A higher altitude will result in? Higher turbo speeds Lower turbo speeds Intake manifold stabilsation Question Title * 29. A dozer quick drop valve will allow? Rod end oil to enter the head end of the blade lift cylinder when the blade is lowered Head end oil to enter the rod end of the blade lift cylinder when the blade is lowered Free flow of tank oil to the rod end of the cylinder when the blade is lowered Question Title * 30. HMU = ? Hydraulic Mechanical Unitinjector Hand Metering Unit Hour Meter Units Done