PIPEFITTER STAR EXAM QUESTIONS AND CORRECT ANSWERS | LATEST UPDATED 2026/2027 WITH VERIFIED SOLUTIONS | ASSURED PASS | GRADED A+.

PIPEFITTER STAR EXAM QUESTIONS AND CORRECT ANSWERS | LATEST UPDATED 2026/2027 WITH VERIFIED SOLUTIONS | ASSURED PASS | GRADED A+. What is the minimum safe working distance for overhead power lines? - ANSWER: 10 feet What causes 90% of all construction injuries and deaths and are used to help OSHA inspectors improve their effectiveness? - ANSWER: Focus Hazards What is the standard procedure used to safely de-energize equipment on circuits before they are worked on? - ANSWER: Lockout/Tagout Which of the following is not true about Material Safety Data Sheets? - ANSWER: They can be written in any language What are the four focus inspections OSHA compliance officers look for? - ANSWER: Fall Hazards, Electrical Hazards, Caught in, Struck by The sizes of pipe are identified by the measurement called the: - ANSWER: 2 | P a g e Nominal pipe size NPS Steel pipe is supplied with the following end finish (es): - ANSWER: PESC, T & C TBE (All of the above) Regulating or throttling flow is done with a: - ANSWER: Both B and C, (globe and gate valve) What are two kinds of misalignment that must be checked for when installing pumps? - ANSWER: Parallel and angular alignment What is the function of a compressor? - ANSWER: Create flow in the system What is a typical type of welded pipe joints? - ANSWER: Butt-welded, Socketwelded, Slip-on Flanged (All of the above) List the four principle functions of valves. - ANSWER: Start/Stop, Regulate/Throttle, Relief, Reduce 3 | P a g e After fittings and tubes are cleaned and fluxed, they should be assembled and soldered - ANSWER: As soon as possible The relief valve is sized to the ________ rating of a boiler - ANSWER: Gross Output Violent flashing and collapsing of vapor bubbles in a centrifugal pump is called. - ANSWER: Cavitation Device that controls the pressure in a low pressure steam boiler - ANSWER: Pressuretrol Function of an evaporator - ANSWER: Absorb heat from the system Metal which has a high iron content - ANSWER: ferrous Why should the angle between the leg of a swing and the load never be less than 30 degrees? - ANSWER: More stress loads are applied on the sling 4 | P a g e Four types of copper tube joints - ANSWER: Soldered, Brazed, Flared, Compression Most common hanger type - ANSWER: Clevis Amount of heat required to bring about a change in a state in a substance - ANSWER: Latent heat Harmful products of incomplete combustion - ANSWER: Carbon Monoxide & Aldehydes Regulating or throttling flow is done with - ANSWER: Globe Weakest part of a chain hoist - ANSWER: Lower Hook Four principle functions of valves - ANSWER: Start/Stop, Regulate/Throttle, Relief, Reduce 5 | P a g e Which hitch can support the most weight? - ANSWER: Basket Hitch Minimum safe working distance for overhead power lines - ANSWER: 10 feet Three basic hitches which can be used for lifting with a sling - ANSWER: Straight, Choker, Basket Oxyacetylene flame has a peak temperature of approximately - ANSWER: 6300 Float and thermostatic trap rises to discharge - ANSWER: Condensate Vapor heated above its corresponding saturation temperature with no change in pressure - ANSWER: Superheated Magnetic field around a current carrying wire - ANSWER: Exists at all points long its length Never expose any part of a compressed gas cylinder to temps above - ANSWER: 125 F 6 | P a g e What must be check on a boiler before putting it on line for the first time? - ANSWER: Safety relief valve An increase in pressure will cause the boiling temperature of a liquid to - ANSWER: Increase 4 main components in a refrigeration system - ANSWER: Compressor, Condenser, Evaporator, Metering device. Quanting of heat involved to change a substance that can be measured with a thermometer - ANSWER: Sensible heat Main advantage of a fluidized bed boiler - ANSWER: Low SO & NOx emissions Two basic types of low-water cutoffs - ANSWER: Float type and electric probe Measurement unit used to express rate of flow - ANSWER: Velocity Function of a metering device in refrigeration - ANSWER: Regulates the flow of refrigerant 7 | P a g e What is the function of a condeser - ANSWER: Reject heat from the refrigerant Portion of the boiler which increaes the temperature of the steam so that it doesn't condense in the turbine - ANSWER: Reheater What percent of electricity is produced from power plants using steam? - ANSWER: 90% Two basic types of check valves - ANSWER: Lift and Swing Maximum recommended service temperature of a brazed joint - ANSWER: 350 F Generates a small amount of voltage when heated - ANSWER: Thermocouple Work is defined as - ANSWER: force times distance In a constant current welding power source, the welding current remains relatively constant despite changes in - ANSWER: Arc Length 8 | P a g e Thank you for Purchasing this exam Study Guide. 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