EWRB THEORY FINAL EXAM COMPLETE QUESTIONS AND ANSWERS ALREADY PASSED!! (A+ Graded)
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Course
Ewrb
Institution
Ewrb
EWRB THEORY FINAL EXAM
COMPLETE QUESTIONS AND ANSWERS
ALREADY PASSED!! (A+ Graded)
1) What does BJT stand for? - ANSWER Bipolar Junction Transistor
2) What does the transducer do? - ANSWER converts energy from one form
to another
3) State one factor that determines voltage...
EWRB THEORY FINAL EXAM
COMPLETE QUESTIONS AND ANSWERS
ALREADY PASSED!! (A+ Graded)
1) What does BJT stand for? - ANSWER ✔ Bipolar Junction Transistor
2) What does the transducer do? - ANSWER ✔ converts energy from one form
to another
3) State one factor that determines voltage drop - ANSWER ✔ Length of cable
4) State one reason why a class 1 electrical appliance is set at a maximum of 1
ohm - ANSWER ✔ It prevents the touch voltages rising to dangerous levels
5) State the test voltage used for carrying out an insulation resistance test. -
ANSWER ✔ 500V DC
6) What is the name of the system where neutral conductor is connected to the
earth at the main switchboard - ANSWER ✔ MEN System
7) State one reason why HRC fuses are installed at the origin of the final sub
circuit supplying the induction motor - ANSWER ✔ To provide short
circuit fault protection to both the final sub circuit and the motor
8) State one reason why an RCD tester is used to test a PRCD - ANSWER ✔
To verify the PRCD operates within the specified residual current
9) State the main safety issue that would occur if the only testing done was
between each phase on a 400V oven - ANSWER ✔ One phase could still be
live
10) What potential danger would transposition of phased and neutral in an
isolating switch create. - ANSWER ✔ Phase would still be live when the
isolation switch is in the off position
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