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Questions and Answers

How many grams of CO2 would be produced if 10 moles of oxygen were consumed in the oxidation process?

  • 660 grams
  • 220 grams
  • 440 grams (correct)
  • 880 grams
  • What is the oxygen content of a tank atmosphere that contains 76% ambient air and 24% hydrocarbons?

  • 20.76%
  • 23.04%
  • 19.04% (correct)
  • 18.36%
  • What is the total circuit resistance in a series circuit with three resistors valued at 2 ohms, 3 ohms, and 5 ohms?

  • 12 ohms (correct)
  • 5 ohms
  • 10 ohms
  • 15 ohms
  • After 20 years, what radioactivity would remain from 1 Ci of Co-60 with a half-life of 5.24 years?

    <p>0.5 Ci</p> Signup and view all the answers

    How thick must the shielding be to reduce an 800-mR source to 200-mR exposure if concrete has a half-value thickness of 2.7 inches?

    <p>10.8 inches</p> Signup and view all the answers

    What is the formula for determining the half-life of a radionuclide?

    <p>T1/2 = In 2 / k</p> Signup and view all the answers

    Which type of radiation is most penetrating and can cause skin burns?

    <p>Neutron radiation</p> Signup and view all the answers

    What does the equation I₂ = I₁(d₁ / d₂)² represent?

    <p>Intensity relation based on distance</p> Signup and view all the answers

    What is the formula for calculating the volume of a tank?

    <p>V = πr²h</p> Signup and view all the answers

    For the equation Q = AV, what does A stand for?

    <p>Cross-sectional area</p> Signup and view all the answers

    Which angle corresponds to a sling that holds 70% of the load?

    <p>45°</p> Signup and view all the answers

    The circumference of a circle is represented by which formula?

    <p>C = 2πr or πd</p> Signup and view all the answers

    Which of the following materials is effective in shielding against gamma radiation?

    <p>Heavy metals like lead</p> Signup and view all the answers

    What does the variable 'k' represent in the context of radioactivity formulas?

    <p>Disintegration constant</p> Signup and view all the answers

    What is the formula to calculate the Time Weighted Average (TWA) of a chemical exposure?

    <p>TWA = (C₁ × T₁ + C₂ × T₂ + ... + C × T) / (T₁ + T₂ + ... + T)</p> Signup and view all the answers

    Which of the following is the correct expression for the Lower Flammable Limit (LFL) of a mixture?

    <p>LFL = 1 / (f₁ / LFL₁ + f₂ / LFL₂ + ... + fₙ / LFLₙ)</p> Signup and view all the answers

    In the context of electrical formulas, which equation correctly represents Ohm's Law?

    <p>I = V / R</p> Signup and view all the answers

    When calculating the Threshold Limit Value (TLV) for a mixture, what should be done if the sum of the fractions exceeds one?

    <p>Recognize that an overexposure exists.</p> Signup and view all the answers

    What is the relationship represented by the Combined Gas Law involving pressure, volume, and temperature?

    <p>PIV₁ = P₂V₂/T</p> Signup and view all the answers

    Which unit is consistent for ppm and mg/m³ calculations?

    <p>Both must be expressed in the same units of volume.</p> Signup and view all the answers

    What is the formula to calculate Resistance in a parallel circuit?

    <p>1/R = 1/R1 + 1/R2 + ... + 1/Rn</p> Signup and view all the answers

    What is the result of calculating $69.95 - 10%$ discount?

    <p>$62.96</p> Signup and view all the answers

    What is $14 \times 356$?

    <p>4984</p> Signup and view all the answers

    What is the result of the calculation $\pi \times 3.6^2$?

    <p>40.72</p> Signup and view all the answers

    What is the value of $(12 \times 62) / \sqrt{9}$?

    <p>6</p> Signup and view all the answers

    What is $5^{4.87}$?

    <p>2535</p> Signup and view all the answers

    What is $4.87 / 2535$ approximately equal to?

    <p>0.022</p> Signup and view all the answers

    What is the value of $\log 15.32$?

    <p>1.19</p> Signup and view all the answers

    Calculate $90 + 16.61 \times \log_{10} 2$. What is the result?

    <p>95</p> Signup and view all the answers

    What is the value of $1/e^{-2.5}$?

    <p>0.92</p> Signup and view all the answers

    Calculate the arcsine of $0.5$. What is the result?

    <p>1</p> Signup and view all the answers

    What is the relationship between Capture Velocity (V) and the Cross-Sectional Area (A) of a hood without flanges?

    <p>Increasing A decreases V.</p> Signup and view all the answers

    In the outdoor formula for Wet Bulb Globe Temperature (WBGT), which variable accounts for the Dry Bulb temperature?

    <p>DB</p> Signup and view all the answers

    How does the sound power level (Lw) relate to the acoustic power (W) in watts?

    <p>Lw = 10log10(W/W₀)</p> Signup and view all the answers

    What does the 3-dB rule imply about exposure time (T) and exposure level (L)?

    <p>As L increases, T decreases.</p> Signup and view all the answers

    For hoods with flanges, how is the formula for Capture Velocity (V) modified?

    <p>V = 4Q / (3[10x² + A])</p> Signup and view all the answers

    Which of the following components is NOT part of the indoor WBGT formula?

    <p>DB</p> Signup and view all the answers

    What does the equation 'dB₁ = dB₀ + 20log10(d₀ / d₁)' represent?

    <p>Change in sound pressure with distance.</p> Signup and view all the answers

    What does Noise Dose measure?

    <p>Proportion of noise exposure over time.</p> Signup and view all the answers

    In the formula SPLTotal = SPLIndividual + 10logn, what does 'n' represent?

    <p>Total number of noise sources.</p> Signup and view all the answers

    According to the noise formulas, what is the consequence of applying the 6-dB rule?

    <p>Sound level decreases by 6 dB at double the distance.</p> Signup and view all the answers

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