Pinnacle Infotech Electrical Design Engineer Interview Questions, Process, and Tips

Revit software, aptitute & reasoning

Q1. Order of Cable size from 4 sqmm?
Ans. 
The order of cable sizes from 4 sqmm is 6 sqmm, 10 sqmm, 16 sqmm, 25 sqmm, 35 sqmm, 50 sqmm, 70 sqmm, 95 sqmm, 120 sqmm, 150 sqmm, 185 sqmm, 240 sqmm, 300 sqmm, 400 sqmm, 500 sqmm, 630 sqmm, 800 sqmm, 1000 sqmm.
• 6 sqmm

• 10 sqmm

• 16 sqmm

• 25 sqmm

• 35 sqmm

• 50 sqmm

• 70 sqmm

• 95 sqmm

• 120 sqmm

• 150 sqmm

• 185 sqmm

• 240 sqmm

• 300 sqmm

• 400 sqmm

• 500 sqmm

• 630 sqmm

• 800 sqmm

• 1000 sqmm
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Q2. Voltage drop Calculation Parameters?
Ans. 
Voltage drop calculation parameters include conductor material, length, cross-sectional area, current, and temperature.
• Conductor material affects resistance and therefore voltage drop.

• Length of the conductor directly impacts voltage drop.

• Cross-sectional area of the conductor affects resistance and voltage drop.

• Current flowing through the conductor influences voltage drop.

• Temperature can also affect the resistance of th
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Q3. How do you calculate current from Kw,pf,Voltage given?
Ans. 
Current can be calculated using the formula: Current (A) = Power (kW) / (sqrt(3) x Voltage (V) x Power Factor)
• Use the formula: Current (A) = Power (kW) / (sqrt(3) x Voltage (V) x Power Factor)

• Make sure to convert kW to W if necessary (1 kW = 1000 W)

• Ensure the power factor is a decimal value, not a percentage (e.g. 0.85 instead of 85%)
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Q4. Detais about LSIG protection
Ans. 
LSIG protection refers to Long-Time, Short-Time, Instantaneous, and Ground fault protection settings in circuit breakers.
• LSIG protection is commonly used in circuit breakers to provide comprehensive protection against various types of faults.

• Long-Time setting protects against overloads by allowing the circuit breaker to trip after a specified time delay.

• Short-Time setting protects against short circuits by tripping the...read more
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