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IOCL Junior Engineering Assistant Mock Test 2026 – Free Online Test Series

This page lists all 5 free IOCL Junior Engineering Assistant mock tests on Sarkari Results Now. A typical test has about 20 questions with a 20-minute timer. Tests follow the latest IOCL Junior Engineering Assistant exam pattern and are free to attempt. Attempt them in order, review the answers after each test and track your progress to find weak topics before the real exam.

All IOCL Junior Engineering Assistant Mock Tests

Sample IOCL Junior Engineering Assistant Questions

  1. For the same compression ratio and heat input, the air-standard efficiency is

    1. same for both cycles
    2. higher for Otto cycle than for Diesel cycle
    3. higher for Diesel cycle than for Otto cycle
    4. independent of compression ratio in both

  2. The most frequently occurring fault on a transmission line is

    1. three-phase fault
    2. double line fault
    3. open-circuit fault of all phases
    4. single line to ground fault

  3. The RMS value of a sinusoidal voltage of peak value Vm is

    1. Vm×√2
    2. 2Vm/π
    3. Vm/√2
    4. Vm/2

  4. Which gas is most abundant in the Earth's atmosphere?

    1. Argon
    2. Carbon dioxide
    3. Oxygen
    4. Nitrogen

Attempt the full test above to see the correct answers.