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Question
The maximum permitted disconnection time for a 20A radial circuit connected to a TN-S system is
(A) 0.4 sec
(B) 5 sec
(C) 0.2 sec
(D) 40ms
Answer
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Related questions
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Doing good journalistic work often means that a journalist contributes to causing some sort of harm.
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Q:
A BS EN 61008-1 RCD is to be installed on a farm to provide fire protection, The maximum I∆n rating for the device would be
(A) 500mA
(B) 100 mA
(C) 300 mA
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Q:
State one situation within a domestic installation which would require the installation of an RCD
(A) Existing circuits in a bathroom
(B) Additional socket outlet installed in a bedroom
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Q:
A special location which may be connected to a TN-C-S system is
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(D) Sauna
Q:
The purpose of an initial verification as described in GN3 is
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(B) To confirm by inspection and test that the installation complies with the design and construction aspects of EAWR 1989
(C) That it works correctly and is compliant with GN3
(D) To confirm that it is complete and works correctly
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Legacy Media are products that predate the internet.
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Patch is dedicated to what type of coverage?
(A) Sports
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When Newsday first started a paywall…
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Investigative journalism has been…
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(B) decreasing at news outlets in recent years
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Two special locations which are divided into zones are
(A) A restrictive conductive location and a room containing a bath or shower
(B) A Sauna and a Construction site
(C) A Marina and a Caravan site
(D) A Sauna and a room containing a bath or shower
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In the dual-product model, generally,
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IPXXB is the IP code for
(A) A 12.5mm diameter hole
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Q:
One condition that must be checked when confirming polarity is
(A) Correct IP ratings
(B) Double pole switches are used to switch all line conductors
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Q:
The maximum tabulated Zs for a protective device as shown in BS 7671 is 1.44Ω, the maximum permissible measured Zs will be
(A) 1.44Ω
(B) 1.43Ω
(C) 1.15Ω
(D) 1.08Ω
Q:
Additional protection will be required for
(A) Circuits which cannot meet the required disconnection time
(B) A lighting circuit in a room containing a bath or a shower
(C) Installations where there is no protective bonding
(D) Circuits supplied by a TT system
Q:
When a test on a cable is carried out using a low resistance ohmmeter the value provided by the instrument will be in
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(B) mΩ
(C) MΩ
(D) Ω
Q:
The title given in law to the person carrying out periodic inspections is
(A) Duty holder
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