Ontario Power Generation (OPG) Orange 1 Practice Test

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• The overall purpose of the dosimetry and bioassay requirements is to:
• Which statement about surface contamination measurements is true?
• If a three-phase motor with the same line voltage and current has its power factor reduced from 0.8 to 0.5, the input real power will be approximately:
• Which activity is included in radiation protection responsibilities?
• Which statement best describes the relationship between ALARA and dose limits?
• Which of the following is NOT a listed reason why internal radioactive material can be more serious than external?
• Convert 3/4 to a decimal.
• Which of the following is NOT a responsibility of the employer regarding radiation protection?
• Which distance is NOT acceptable between the two dosimeters?
• A three-phase motor has a rated output of 7.5 kW and input of 9 kW. What is its efficiency?
• In a lead-acid battery, why is proper ventilation important?
• What is neutron radiation?
• What property describes a material's ability to resist permanent deformation under load?
• What is the primary purpose of an emergency stop (E-stop) button on industrial equipment?
• Where should the dose control device (DCD) be worn?
• What is the unit used to measure radiation?
• What happens to the current in an RC circuit as a capacitor charges toward its supply voltage?
• The policy references zone 2 and zone 3. Pregnant workers entering these zones must:
• Which statement is true about horsepower-hours?
• If a device consumes 200 W and outputs 150 W of useful work, what is its efficiency?
• Which of the following describes external radiation exposure reduction methods?
• Which restriction applies to pregnant workers regarding zone entry?
• How does Tritium enter the body?
• What is the maximum radiation exposure to an unborn child?
• When is alpha radiation a concern?
• Which valve is commonly used to throttle flow in piping systems?
• Which statement regarding ionizing radiation is true?
• What must you do when entering a lower zone?
• A plant produces 100 MW at noon and 140 MW at 6 pm. The average production over the interval is?
• Beta external hazard characteristics include which of the following?
• In an AC circuit with a given RMS voltage of 230 V and resistance of 23 Ω, what is I_rms?
• What is loose surface contamination?
• What is OPG's yearly dose for the whole body?
• Which statement about routes to enter the body is true?
• What is ionizing radiation?
• The energy unit used in electrical energy billing is typically kilowatt-hour. How many joules are in 1 kWh?
• What are the two main components of lockout-tagout procedures?
• In a balanced three-phase system, how is real power P related to apparent power S and power factor PF?
• Which statement describes indirect ionization in radiation hazards?
• Tritium solid waste is placed in which container?
• What defines a Radioactive Work Area (RWA)?
• Which are routes by which radioactive material can enter the body?
• Convert 25 °C to Kelvin.
• What principle does a thermocouple rely on to measure temperature?
• Which dosimeters are worn on the trunk within 15 cm of each other when performing radiation work or entering a radiation work area, and by pregnant workers entering zone 2, 3 or unzoned areas?
• Atmospheric pressure of 101.3 kPa is approximately how many psi?
• Which option best expresses Gay-Lussac's law for a gas at constant volume?
• How does gamma radiation travel?
• What is the purpose of Whole Body Counter (WBC) sampling?
• Which statement best describes Zone 2?
• Which statement correctly defines absolute pressure?
• In a parallel circuit, how is the reciprocal of the total resistance related to the reciprocals of the individual resistances?
• Which two dosimeters are specified for use in the described policy?
• Which statement correctly defines radiation?
• NEW in this context refers to which of the following?
• What text is typically displayed on a radiation danger sign?
• After radiopharmaceutical treatment, which action is required?
• Which action is recommended for a worker who is pregnant or breastfeeding?
• Can Orange 1 return to EPD for their own monitoring purposes?
• Which of the following is NOT a listed long-term effect of chronic radiation exposure?
• Name three types of PPE commonly required in electrical maintenance work.
• What describes the typical effect of a valve balancing control when demand increases?
• What is the CNSC's yearly dose limit for the whole body?
• Which department is responsible for monitoring radiation levels and ensuring regulatory compliance?
• In lockout-tagout procedures, what is the primary function of a lockout device?
• What are the bin color codes for dry solid waste in zoned areas?
• What is the relation between rem and mrem?
• What is the minimum dose before there are in-utero effects to an unborn child?
• What is Lockout/Tagout (LOTO) intended to prevent?
• Name the three modes of heat transfer.
• ALARA stands for?
• What is gamma radiation?
• In contamination measurements, what does CPM stand for?
• What is the purpose of a tagout in LOTO?
• Where should the dosimeters be worn according to the policy?
• How many meters are in 5 kilometers?
• For a balanced three-phase system, how is the apparent power S calculated from line voltage V_L and line current I_L?
• What is the main purpose of medical surveillance programs for exposed workers?
• Which unit is used to measure sound intensity level?
• What does the first law of thermodynamics state?
• In the context of radiological safety, which action is described as prohibited after radiopharmaceutical treatment?
• Convert 100 °C to Fahrenheit.
• In a feedback control loop, what is the purpose of a reference input?
• Alpha radiation primarily affects which part of the body?
• Which type of radiation is associated with whole-body exposure?
• Tritium is best described as which type of hazard?
• The unit for sound intensity level is decibel (dB). A 10 dB increase corresponds to how many times more intensity?
• What is an arc flash and why is arc-rated PPE necessary?
• Which workers entering zone 2, zone 3, or unzoned areas are explicitly mentioned for dosimeter use?
• How should you determine that a hand tool is free of contamination for an Orange 1 worker?
• Which of the following is a method to reduce internal radiation exposure?
• When contamination is detected by any monitor, what is the first action you should take?
• If contamination is found during material transfer between zones, what should you do?
• What is dose rate?
• Which body parts are affected by beta radiation?
• What does maximum survivable dose refer to?
• How far can alpha radiation travel?
• How are fixed and loose surface contaminations measured?
• A bioassay system and WBC count is required to:
• In lockout-tagout procedures, which element serves to physically prevent energy release?
• Who must approve a pregnant worker entering radiological zones?
• After radiopharmaceutical treatment, which actions are prohibited?
• If the dose rate is 5 rem per hour, what is the dose rate in mrem per hour?
• ALARA means what in radiation protection?
• In a pipe of constant cross-sectional area, if the velocity of a liquid doubles, what happens to the volumetric flow rate?
• A plant produces 120 MW at noon and 180 MW at 6 pm. The average production over the interval is?
• Tritium normally enters the body by which routes?
• In an AC circuit with a constant resistance, how is RMS current related to RMS voltage and resistance?
• What is one listed responsibility of NEW personnel in the radiation safety program?
• When transferring materials from a higher zone to a lower zone, what must be done to ensure contamination control?
• What restriction applies after radiopharmaceutical treatment?
• Which statement describes the characteristics of neutron radiation?
• When is neutron radiation mainly a concern?
• Which statement best describes ALARA in practice?
• If a fixed area gamma monitor (FAGM) alarms in your work area, which action should you take first?
• Which part of the body does alpha radiation affect?
• Which statement best describes how gamma radiation travels?
• Chronic radiation exposure is best described as continuous or prolonged exposure to ionizing radiation over an extended period of time. Which statement best describes this concept?
• The rule of conservation of energy states energy in a closed system is:
• What does Boyle's law state for a fixed amount of gas at constant temperature?
• Fatigue in materials engineering is best described as?
• What describes a Contamination Control (Rubber Area)?
• In power systems, what term describes the ability to supply the aggregate electrical demand without failure?
• Why must you submit a urine sample (bioassay)?
• Solve for x: 2x + 5 = 17.
• Where may food be consumed in radiological zones?
• If you lose your dosimeter, what is the correct sequence?
• Which of the following is NOT a standard mode of heat transfer?
• In gases, how does pressure relate to temperature at constant volume (Gay-Lussac's law)?
• In unzoned areas, which statement is true about radioactive transport and contamination?
• Where may drinks be consumed in radiological areas?
• What is the purpose of an alarm trip in a control system?
• What color-coded qualification is required to access radiography areas?
• The dosimeters described are worn on the trunk within a distance of:
• Which factor makes internal contamination challenging to manage?
• What is chronic radiation exposure?
• A three-phase motor connected to a 480 V supply draws 12 A with a power factor of 0.8. What is the input real power?
• A transformer has primary turns Np and secondary turns Ns. If the input voltage is 480 V and the turns ratio Ns/Np = 0.5, what is the output voltage?
• Which device may an Orange 1 person use to determine hand tool contamination?
• Which of the following statements is consistent with the described dosimetry policy for pregnant workers entering zone 2 or 3?
• If a device has 200 W input and 150 W output, what percent of input power is lost as heat?
• For a parallel circuit with resistors R1 = 6 Ω and R2 = 3 Ω, what is R_total?
• Gamma radiation is described as a high-energy photon that travels through the body and can be highly penetrative. Which option corresponds to this description?
• In a PLC, what is the function of a ladder logic rung?
• With medical treatment, what is the max survivable dose?
• Which of the following is NOT a standard mode of heat transfer?
• In a series circuit, how does the total resistance relate to the individual resistances?
• A chart shows plant flow rising from 100 MW to 150 MW while pressure falls from 60 psi to 30 psi. What could this suggest about the system?
• The concept of a dose management system in the material is described as:
• Can Orange 1 decontaminate no-permit items?
• Who directs non-routine urine sampling?
• What is the correct formula to calculate current in a DC circuit using Ohm's law?
• What is the primary purpose of a dosimeter?
• If the apparent power S is 50 kVA and the power factor PF is 0.9, what is the real power P?
• Which statement best describes the Seebeck effect used in thermocouples?
• Which formula best expresses the input real power for a balanced three-phase motor given line voltage, line current, and power factor?
• In a DC circuit with V = 12 V and R = 4 Ω, what is the current I?
• Fatigue can be described as which of the following?
• What action must an Orange 1 worker take when approaching a radiation danger sign?
• Beta radiation predominantly affects which areas?
• Entry into radiography areas requires permission from the radiography crew leader and direct protection by a lead radiographer who is RPC yellow or green qualified. Which option best matches this requirement?
• If a tank is rated to 150 psi gauge, what is its absolute pressure at sea level?
• Which term describes the property that relates length change to temperature for solids?
• Where is a TLD badge required to be worn?
• A 3-phase motor connected to a 480 V line draws 12 A with a power factor of 0.85. What is the electrical input power in kilowatts?
• In a compressed air system, which unit is commonly used to quantify leak rate per unit time?
• One horsepower-hour equals approximately how many joules?
• The phrase "as directed by RHP, DHP or RPC" appears in relation to:
• A new or experienced dosimetry worker who is pregnant or breast feeding may notify which people?
• Neutron radiation primarily affects which part of the body?
• Where should contaminated liquid waste be collected and disposed?
• What is fixed surface contamination?
• In an emergency, what is the primary purpose of a muster point?
• Atmospheric pressure is approximately 101.3 kPa. What is this pressure in psi (nearest tenth)?
• What does NEW stand for in radiological worker terminology?
• What approval is required before entering a radioactive area?
• When heated, most solids expand. If a rod expands, which property changes?
• Which radiation affects the lungs?
• Which beta emitter is considered an internal hazard?
• What is acute radiation exposure?
• What PPE must be worn in a rubber area or during contact contamination work?
• In a pure inductive AC circuit, what is the phase relationship between voltage and current?
• How close should the DCD be worn to the TLD badge?
• Which statement describes a responsibility of the Radiation Protection Department?
• Which body part is primarily affected by alpha radiation?
• Gamma radiation primarily affects which part of the body?
• Pregnant workers entering Zones 2, Zone 3, or unzoned areas must wear a DCD when performing radioactive work or entering restricted areas. Which statement is correct?
• A sample of 50 readings has a mean of 75 and standard deviation 5. What is the coefficient of variation?
• In lockout-tagout procedures, which item is used to secure energy isolation?
• Which zone contains radioactive systems and has the highest possibility of contamination?
• What is a primary reason for requiring authorization before entering a radioactive area?
• Which expression correctly represents the input power for a balanced three-phase system using line voltage V_L, line current I, and power factor PF?
• In a pipe system with constant roughness, if the flow rate doubles in turbulent flow, what happens to the pressure drop?
• Solve for y: 3y - 4 = 11.
• What type of hazard does alpha radiation pose?