AAHealth and SafetyMr Ali Lilo, AL4510222LTime remaining: 53 QuickSelectQuestiBintasecondsthree of the followingitems of information arerequired when completinga RIDDOR form?1 Date & time of incident2 Type of accident3 Organisation details.4 Employer public liabilityinsurancea) 3,2,4b) 1,4,3c) 4,2,1d) 2,3,1Prev Nextactclass.co.ukQuesti22Questi23Questi24Questi25Questi26Questi27QuestiSubmit Answers

Option d )2,3,1Explanation:The three items to be included in RIDOR form are1. Data and time of…

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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c.1. Which of the following is one of the three essential functions of an equipment grounding conductor?A. Provide an arc-fault current pathB. Establish groundingC. Establish bondingD. Ensure the system is groundedc.2. What's another name for the three-point method of Earth resistance testing?A. Fall-of-potentialB. Line surgeC. Spatial shieldingD. Leakage current c.3. If the National Electrical Code provides a requirement to ground equipment, it generally implies thatthere will be a direct connection to the Earth of a connection through a/anA. grounding electrode conductor.B. equipment grounding conductor.C. equipotential bonding conductor.D. bonding conductor.
Calculate the following. a) Expected voltage at “A” with switch SW1 open. b) Expected voltage at “A” with switch SW1 closed.
In your own words and from your own understanding, avoid plagiarism or copying from the Course Material, explain or describe MOLDED CASE CIRCUIT BREAKER.
1. Outline/Give Two examples for job factors that could lead to poor/bad health and safety behaviour in the workplace? 2. Give thegning limit FB 3. Me 0 4. Before repair work or maintenance of electrical equipment and devices is started, WHAT steps are necessary to undertake to have maximum electrical safety? 5. What power tool is most likely to cause a burn hazard? END Scanned by Candcase
The system having ±0.5% of F.S.D if the full scale deflection is 50 units, then accuracy is _____ a. ±0.25 b. ±1 c. ±0 d. ±0.5
[Fill-in-the-blank] in dwelling units shall supply only loads within that dwelling unit or no loads associated only with that dwelling unit. Select one: a. None of these b. Ground-fault protection c. Service-entrance conductors d. Branch circuits
22.a. Perfect timing of the schedule or frequency of PM inspections and maintenance isA. dependent upon the manpower that’s applied to a program.B. possible within the first two years of a PM program.C. possible within the first year of the program.D. an unreachable goal.22.b. When machines fail shortly after they’ve been built and installed, the failures are termedA. singularity failures.B. independent component failures.C. short-term failures.D. infant mortality failures.
a) Classify the four categories of 3 phase power system faults we experience in our electrical power industry. b) Explain the emergence of such power systems fault as required in (question 1a)? c) Point out each type of fault specified under (a). d) Produce the (1D) design of the three-phase star connected faults stated under(b)
(c) Draw a circuit diagram to represent a TN-C-S earthing system and briefly explain its advantages and disadvantages. (d) Briefly explain how to estimate the height of air termination of a lightning protection system network using the rolling sphere method and protection angle method. (e) Briefly explain what is meant by Ground Potential Rise (GPR) and explain why an animal like cow would not be adequately protected against GPR. Note : answer all or else dnt attempt the question
20.a. What's the primary disadvantage of using copper conductors?A. DurabilityB. CostC. AvailabilityD. Weight20.b. The NEC requires that each service-disconnecting means be suitable forA. hazardous locations.B. disconnecting the meter.C. wet conditions.D. the prevailing conditions 20.c. As a general rule, each building or structure is limited to a single service. What's an automatic exceptionto this rule?A. A second service deemed suitable for useB. A second service having the proper markingsC. Emergency systems or fire pumpsD. Higher building occupancy
h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.
Q3. In a % differential scheme, figure shown below, the two CTs have nominal ration of 100:1. The CT errors for a through fault current of 5000 A are as following: CT1 CT2 Ratio error: 10% 10% Phase angle error: 5% -5% Compute following: i) The spill current of the OC relay in the spill path. ii) If the relay is 50% biased, examine whether relay will trip or remain stable CT, CT Ir CB C.B. メx Egu inder Ne

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