Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
ELECTRICAL LEVEL 2 MODULE 1 ALTERNATING CURRENT CONCLUDING REVIEW SHEET PRACTICE SOLUTION BUNDLED FULLY VERIFIED ONE HUNDRED PERCENT PASS GUARANTEED
Typology: Exams
1 / 16
This page cannot be seen from the preview
Don't miss anything!
⩥ What instrument performs insulation testing? Answer: Insulation tester ⩥ What instrument measures loop impedance? Answer: Loop tester ⩥ What is the minimum insulation resistance generally acceptable? Answer: 1 Megaohm ⩥ What is a switch? Answer: Device that opens or closes circuit ⩥ What is a one way switch?
Answer: Controls light from one location ⩥ What is a two way switch? Answer: Controls light from two locations ⩥ What is an intermediate switch? Answer: Controls light from three locations ⩥ What is a luminaire? Answer: A light fitting ⩥ What is a lamp? Answer: The light source ⩥ What is LED? Answer: Light Emitting Diode ⩥ Why are LEDs efficient? Answer: Low power consumption
⩥ What affects cable rating? Answer: Temperature grouping insulation method ⩥ What is derating? Answer: Reducing cable capacity due to conditions ⩥ What is ambient temperature? Answer: Surrounding temperature ⩥ What is volt drop? Answer: Reduction in voltage along cable ⩥ Why must volt drop be limited? Answer: To ensure equipment operates correctly ⩥ What causes volt drop? Answer: Resistance of cable ⩥ What is the maximum volt drop for lighting circuits?
Answer: 3% ⩥ What is the maximum volt drop for other circuits? Answer: 5% ⩥ What is conduit made from? Answer: PVC or steel ⩥ What is trunking made from? Answer: PVC or metal ⩥ What tool cuts conduit? Answer: Hacksaw ⩥ What tool removes conduit burrs? Answer: Reamer ⩥ What is a saddle used for? Answer: Fixing conduit to wall
⩥ What colour is plug earth pin? Answer: Green and yellow ⩥ What colour is plug neutral pin? Answer: Blue ⩥ What colour is plug line pin? Answer: Brown ⩥ What does PAT testing mean? Answer: Portable Appliance Testing ⩥ What is a portable appliance? Answer: Electrical equipment with plug ⩥ What is an isolator? Answer: Device that disconnects power ⩥ What is double insulation?
Answer: Extra insulation without earth ⩥ What symbol indicates double insulation? Answer: Square inside square ⩥ What is SELV? Answer: Safety Extra Low Voltage ⩥ What voltage is SELV typically? Answer: Below 50V AC ⩥ What is PELV? Answer: Protective Extra Low Voltage ⩥ What is ELV? Answer: Extra Low Voltage ⩥ What is an earth electrode? Answer: Rod placed in ground for earthing
⩥ What spacing is typical for cable clips? Answer: 300mm horizontal ⩥ What is the safe zone for cables? Answer: Prescribed area in walls ⩥ What is the horizontal safe zone? Answer: 150mm from ceiling ⩥ What is the vertical safe zone? Answer: In line with sockets and switches ⩥ What does BS stand for in BS 7671? Answer: British Standard ⩥ What organisation publishes BS 7671? Answer: BSI ⩥ What is the IET?
Answer: Institution of Engineering and Technology ⩥ What does IET Wiring Regulations govern? Answer: Electrical installations ⩥ What is electrical installation? Answer: System of wiring and equipment ⩥ What is a distribution board? Answer: Board distributing circuits ⩥ What is a busbar? Answer: Metal strip distributing current ⩥ What is a neutral bar? Answer: Connection for neutrals ⩥ What is an earth bar? Answer: Connection for CPCs
⩥ What size CPC is in 2.5mm T&E? Answer: 1.5mm ⩥ What size CPC is in 1.5mm T&E? Answer: 1.0mm ⩥ What is a spur? Answer: Branch from ring circuit ⩥ What fuse protects FCU? Answer: 13A ⩥ What does FCU stand for? Answer: Fused Connection Unit ⩥ What is a switched spur? Answer: FCU with switch ⩥ What is a non switched spur?
Answer: FCU without switch ⩥ What is a load? Answer: Device using electricity ⩥ What is a heater? Answer: Device converting electricity to heat ⩥ What is efficiency? Answer: Useful output divided by input ⩥ What is power factor? Answer: Ratio of real power to apparent power ⩥ What is inductive load? Answer: Load containing coils ⩥ What is capacitive load? Answer: Load containing capacitors
⩥ What symbol represents frequency? Answer: Hz ⩥ What is alternating current waveform called? Answer: Sine wave ⩥
