Quiz 02 Hazards and Risks in Electrical Installations (20 mins): Attempt review

Dashboard / My courses / EL03 - Arrange circuits, control and protection for electrical installations / 2 Hazards and Risks in Electrical Installations / Quiz 02 Hazards and Risks in Electrical Installations (20 mins) Started on Tuesday, 30 July 2024, 9:30 PM...

Dashboard / My courses / EL03 - Arrange circuits, control and protection for electrical installations / 2 Hazards and Risks in Electrical Installations / Quiz 02 Hazards and Risks in Electrical Installations (20 mins) Started on Tuesday, 30 July 2024, 9:30 PM State Finished Completed on Tuesday, 30 July 2024, 9:34 PM Time taken 4 mins 6 secs Marks 18.00/18.00 Grade 100.00 out of 100.00 Feedback Congratulations you have achieved 100%. Good luck with your continued studies. Question 1 Correct Mark 1.00 out of 1.00 If a hazard may lead to an outcome of death or permanent disability, the level of risk is recognized as ____________ and this should be given the ___________ priority. Select one: Low, Highest Medium, Lowest High, Highest High, Lowest Your answer is correct. Question 2 Correct Mark 1.00 out of 1.00 When implementing measures to control a risk, which of the following control measures should be implemented first? Select one: Use Engineering controls to isolate the hazard Eliminate the hazard altogether Use Administrative controls such as written directives or PPE Your answer is correct. Question 3 Correct Mark 1.00 out of 1.00 What should occur as part of your overall risk management process if an incident occurs? Select one: Nothing as you have already implemented an approved process Monitor and Review the risk management program for improvements Your answer is correct. Question 4 Correct Mark 1.00 out of 1.00 The following determine the effect of an electric shock on the human body... (You must select all of the correct responses) Select one or more: The time that the shock occurs for The amount of current that flows through the body The pathway the current took through the body Your answer is correct. Question 5 Correct Mark 1.00 out of 1.00 If a low voltage supply can’t be easily isolated, what methods can you use to remove a victim who is suffering from an electric shock? (You must select all of the correct responses) Select one or more: Grab the person around the waist and pull them clear Kick them clear with the sole of your boots Pull them clear by loose clothing Pull them clear with a metal object Your answer is correct. Question 6 Correct Mark 1.00 out of 1.00 If a victim is suffering an electric shock from a high voltage installation, you should still attempt to rescue them by pulling or pushing them clear? Select one: True, as you have a duty of care to do all you can to save them False, as the danger is too high and you shouldn’t put yourself in harm’s way Your answer is correct. Question 7 Correct Mark 1.00 out of 1.00 Extra low voltage is regarded as completely safe, as the voltage and current levels are not sufficient to harm persons, livestock or property Select one: True False  Question 8 Correct Mark 1.00 out of 1.00 An RCD is typically designed to trip when 30mA of earth current is detected. If a person was getting an electric shock of 30mA from an RCD protected circuit, the person would experience a shock with the following expected effects.. Select one: No sensation as 30mA of current cannot be felt A very mild tingling in the local area that is making contact with the electricity A jolt similar to a solid punch with cramping and possible difficulty of breathing It is likely that death would occur as any current is fatal. Your answer is correct. Question 9 Correct Mark 1.00 out of 1.00 The heat generated in a cable is determined using the following formula? Select one: H=IR2t H=I2Rt H=IRt2 H=IRt Your answer is correct. Question 10 Correct Mark 1.00 out of 1.00 If the current in a cable is doubled, the heat generated will increase by the following amount? Select one: Four (4) times (quadruple) Three (3) times (triple) Two (2) times (double) Won’t change as heat generated is not dependent on current Your answer is correct. Question 11 Correct Mark 1.00 out of 1.00 If the current in a cable is tripled, the heat generated will increase by the following amount? Select one: Four (4) times Three (3) times Nine (9) times Won’t change as heat generated is not dependent on current Your answer is correct. Question 12 Correct Mark 1.00 out of 1.00 The maximum continuous current a cable can carry without exceeding its temperature limits is called the.. Select one: Continuous Current Load Continuous Cable Current Current Carrying Capacity Cable Current Maximum Your answer is correct. Question 13 Correct Mark 1.00 out of 1.00 With all other things constant, what will happen to the temperature of a cable if the current flowing through it increases? Select one: The temperature will not change as it is not determined by current The temperature will decrease as the increased current has a cooling effect on the conductor The temperature will increase as the power loss (I2R) in the cable increases Your answer is correct. Question 14 Correct Mark 1.00 out of 1.00 Wiring systems shall be selected and installed to be suitable for the highest and lowest local ambient temperature. The designated ambient temperature for cable installations in Australia is: Select one: 25oC for installations in air and 15oC for installation underground 30oC for installations in air and 25oC for installation underground 40oC for installations in air and 20oC for installation underground 40oC for installations in air and 25oC for installation underground Your answer is correct. Question 15 Correct Mark 1.00 out of 1.00 The best installation method for cable entry into a switchboard (from the following) is: Select one: Cut one large hole in the top of the switchboard allowing room for all existing cables and all possible future cables (ie leaving free access space) Cut a series of smaller holes for multiple cables in each hole with free space being filled with a flammable sealant Cut individual holes for each cable and use cable glands and/or a fire retardant sealant for all free space. Your answer is correct. Question 16 Correct Mark 1.00 out of 1.00 As an electrician you are called out to the job below. The most likely cause of this fault is.. Select one: A short circuit between the adjacent conductors (phase to phase) A short circuit between the damaged conductor and earth (phase to earth) A faulty circuit breaker which did not adequately clear a fault in the circuit A hot joint (high resistance joint) caused by a loose conductor terminal. Your answer is correct. Question 17 Correct Mark 1.00 out of 1.00 The requirements for recessed luminaires are shown in which clause in AS/NZS 3000? Select one: Clause 1.4.64 Clause 4.3.5 Clause 4.5.2.3 Clause 4.6 Your answer is correct. Question 18 Correct Mark 1.00 out of 1.00 Every permanently connected motor needs an isolation switch so that mechanical maintenance can be carried out when needed? Select one: True  False ◄ S02 Presentation - Hazards and Risks in Electrical Installations (updated 27/7/24) Jump to... Physiological Effects of Electric Current ►