LV Electrical Engineer Mock Interview Sheet
This sheet is designed for basic-level LV Electrical
Engineering interview practice. Fill in your own answers to prepare.
1.
What is low voltage (LV)?
Answer:
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2. What
is the standard voltage in Saudi Arabia?
Answer:
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3.
What is the difference between single-phase and three-phase power?
Answer:
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4.
What is a circuit breaker?
Answer:
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5.
What is an MCB?
Answer:
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6.
What is an RCD or RCCB?
Answer:
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8.
What is the color coding of wires in Saudi Arabia?
Answer:
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9.
How do you test a cable before energizing?
Answer:
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10.
What tools do you use as an LV engineer?
Answer:
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11.
What is a distribution board (DB)?
Answer:
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12.
What is the difference between load and current?
Answer:
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13.
What is the formula for power?
Answer:
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14.
What is voltage drop?
Answer:
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15.
How do you prevent voltage drop?
Answer: _____________________________________________
Answer: _____________________________________________
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19. How do you isolate power before working?
Answer:
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20.
What is your role as a junior LV engineer on-site?
Answer:
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21.
What are the types of earthing systems used?
Answer:
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22.
What is the standard frequency in Saudi Arabia?
Answer:
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23.
What is the function of a neutral wire?
Answer:
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24.
What are the types of circuit breakers used in LV systems?
Answer: _____________________________________________
25.
What is a feeder pillar?
Answer:
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26.
What is a trunking and conduit system?
Answer:
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27.
What is diversity factor in electrical design?
Answer:
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28.
What is a harmonics problem in LV systems?
Answer:
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29.
What is an LV switchgear?
Answer: _____________________________________________
30.
How do you test an RCD?
Answer:
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31.
What is the minimum depth for underground cable laying?
Answer:
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32.
What is a cable gland?
Answer:
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33.
What is the function of a surge protection device (SPD)?
Answer:
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34.
What is meant by “de-rating” a cable?
Answer: _____________________________________________
35.
What is loop impedance?
Answer:
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36.
What is difference between isolator and breaker?
Answer:
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37.
What is a VFD (Variable Frequency Drive)?
Answer:
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38.
What is meant by phase-to-phase and phase-to-neutral voltage?
Answer:
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39.
What are the causes of low insulation resistance?
Answer:
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40.
What is your first step before starting any electrical work?
Answer:
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41.
What is a capacitor and why is it used in LV systems?
Answer:
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42.
What is the power factor?
Answer:
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43.
What is the function of a contactor?
Answer:
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44.
What is the difference between a relay and a contactor?
Answer:
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45.
What is an overload relay?
Answer:
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46.
What are the main parts of an LV panel?
Answer: _____________________________________________
47.
What is a busbar?
Answer:
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48.
What is the minimum insulation resistance value for a cable?
Answer:
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49.
What are the types of cables used in LV systems?
Answer:
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50.
What is an IP rating in electrical equipment?
Answer:
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51.
What causes an MCB to trip?
Answer: _____________________________________________
52.
What is the difference between fuse and MCB?
Answer:
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53.
What is a load schedule?
Answer:
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54.
How do you calculate current from power?
Answer:
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55.
How do you check phase sequence?
Answer:
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56.
What is LOTO (Lockout-Tagout)?
Answer:
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57.
What is the minimum clearance required in front of an electrical panel?
Answer:
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58.
What is a short-to-earth fault?
Answer:
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59.
What is the purpose of a DB schedule?
Answer:
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60.
What are some common safety rules on site?
Answer:
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