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25425
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  NZQA registered unit standard25425 version 3Page 1 of 4 TitleApply mathematics in a plumbing, gasfitting, or drainlaying situationLevel2Credits3Purpose This unit standard has been developed for learning andassessment off-ob!People redited #ith this unit standard are able to$ in aplumbing$ gasfitting$ or drainla%ing situation& use mathemati s'estimate$ measure and al ulate using metri measurements%stems' solve formulae-based problems' onvert metri units'and interpret plumbing$ gasfitting$ or drainla%ing informationfrom graphs and tables! Classification Plumbing$ (asfitting and )rainla%ing * +ore Plumbing$ (asfitting$ and )rainla%ing Available grade  A hieved Explanatory notes 1This unit standard is aligned #ith the ,orbase litera % profile of a plumber.gasfitter!2)efinition Plumbing, gasfitting, or drainlaying situations  are situations onte/tualised or relevantto plumbing$ gasfitting$ or drainla%ing! 0or assessment purposes$ either plumbing$gasfitting$ or drainla%ing situations are appli able!3Te hnolog% ma% be used for all al ulations and formulae #ill be provided b% theassessor! utcomes and evidence re!uirements utcome se mathemati s in a plumbing$ gasfitting$ or drainla%ing situation! Evidence re!uirements 1!1 ale fa tors are used to determine dimensions!angedetermine full sie from s ale dra#ing dimensions'determine suitable s ale for dra#ing a full sie omponent! The ills rganisation6 +ode 171554 ©  Ne# Zealand Qualifi ations Authorit% 2718  NZQA registered unit standard25425 version 3Page 2 of 41!2atio proportions are al ulated orre tl% in a ordan e #ith a spe ifi ation!angedilution of on entrate$ per entage of additive$ geometri proportion ratio!1!3Angles are measured a uratel% using a protra tor! Angles are added andsubtra ted using the 387 degree ompass!angein ludes 9 addition for#ards and ba #ards through 387 degrees!1!40ra tions are al ulated to find plumbing$ gasfitting$ or drainla%ing information!angema% in lude 9 determination of number of pipes of a given lengthre:uired to mae up a spe ified distan e!1!50ra tions are onverted to de imals and per entages$ and vi e versa!1!8)e imals up to si/ pla es are rounded appropriatel% for a range of pra ti alsituations!angepra ti al situations in lude 9 dimensioning$ re ording measuredinformation$ ordering material that has ontingen % and needs tobe ut to length$ differen es in magnitude bet#een rounding mmand m! utcome 2 ;stimate$ measure$ and al ulate using metri measurement s%stems in a plumbing$gasfitting$ or drainla%ing situation! Evidence re!uirements 2!1)istan e is estimated and measured a uratel% <a deviation = 7 1> is re:uired?in units of millimetres <mm? and metres <m?!2!2Area al ulated a uratel% <a deviation = 7 1> is re:uired? in units of s:uaremillimetres <mm 2 ? and s:uare metres <m 2 ?!2!3@olume is al ulated in units of ubi metres <m 3 ?   and litres <l?!2!4ass is al ulated from volume in units of grams <g? and ilograms <g?!2!5Pressure is al ulated in units of ilopas als <Pa?!2!8;nerg% usage is al ulated for applian es #ith no#n energ% onsumption!angemegaoule <B?$ ilo#att <,?! The ills rganisation6 +ode 171554 ©  Ne# Zealand Qualifi ations Authorit% 2718  NZQA registered unit standard25425 version 3Page 3 of 4 utcome 3 olve formulae-based problems in a plumbing$ gasfitting$ or drainla%ing situation! Evidence re!uirements 3!10ormulae are used to solve problems in a plumbing$ gasfitting$ or drainla%ing onte/t! The formulae used are onsistent #ith the problem!angepressure$ flo# rates$ time to heat #ater in a storage tan!3!20ormulae are transposed to determine unno#n :uantities!angevolumetri <diameter of ontainer given apa it%? and lineal<diameter #hen given ir umferen e? e:uations! utcome # +onvert metri units in a plumbing$ gasfitting$ or drainla%ing situation!angem are onverted to mm and vi e versa' m 2  are onverted to mm 2  and vi eversa' m 3  are onverted to litres and vi e versa' g are onverted to g and vi eversa' Pas als <Pa? are onverted to Pa and vi e versa' ,atts <,? are onverted to , and B and vi e versa' oules <B? are onverted to B and vi eversa! Evidence re!uirements 4!1etri units in a plumbing$ gasfitting$ or drainla%ing situation are onverted! utcome $ Cnterpret plumbing$ gasfitting$ or drainla%ing information from graphs and tables! Evidence re!uirements 5!1Numeri al information is interpreted from graphs and is onsistent #ith the datare orded in them!angema% in lude 9 bar graph$ line graph$ monograph'eviden e of t#o is re:uired!5!2Te/tual information is interpreted from tables and is onsistent #ith the te/tre orded in them! Planned revie% date 31 )e ember 271D The ills rganisation6 +ode 171554 ©  Ne# Zealand Qualifi ations Authorit% 2718  NZQA registered unit standard25425 version 3Page 4 of 4 &tatus information and last date for assessment for superseded versionsProcess'ersion(ateLast (ate for Assessment egistration123 Banuar% 277EN.Aevision21F 0ebruar% 2711N.Aevie#315 ar h 2712N.A Consent and )oderation *e!uirements +C)* reference 777FThis + an be a essed at http&..###!n:a!govt!n.frame#or.sear h.inde/!do! Please note Providers must be granted onsent to assess against standards <a redited? b% NZQA$before the% an report redits from assessment against unit standards or deliver oursesof stud% leading to that assessment!Cndustr% Training rganisations must be granted onsent to assess against standards b%NZQA before the% an register redits from assessment against unit standards!Providers and Cndustr% Training rganisations$ #hi h have been granted onsent and#hi h are assessing against unit standards must engage #ith the moderation s%stem thatapplies to those standards!e:uirements for onsent to assess and an outline of the moderation s%stem that appliesto this standard are outlined in the +onsent and oderation e:uirements <+?! The+ also in ludes useful information about spe ial re:uirements for organisations #ishingto develop edu ation and training programmes$ su h as minimum :ualifi ations for tutorsand assessors$ and spe ial resour e re:uirements! Comments on this unit standard Please onta t The ills rganisation infoGsills!org!n if %ou #ish to suggest hangesto the ontent of this unit standard! The ills rganisation6 +ode 171554 ©  Ne# Zealand Qualifi ations Authorit% 2718
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