Chief Engineer UFIV Practice Test (Fishing Vessels, UFIV01)

Chief engineer on big fishing boats, processors and tenders (UFIV): motor plants, safety, general subjects. Coast Guard exam code UFIV01.

204 real questions from the Coast Guard National Maritime Center's public sample exams, free. Each module needs 70% to pass.

Passing score: Coast Guard pass marks module by module, and the retest rules

What's free: daily rounds, the Brig, the drills and the Pass Meter, for every license. Your first module test is free too. After that, the full Exam Room is $19, once. No subscription.

What's on the test

Picture questions link to the drawing in the Coast Guard's free sample PDF. A few that need reference tables are left out.

10 sample questions

1. The tube sheets installed in a fire-tube auxiliary boiler are normally connected by __________.

   • A.girder stays
   • B.fire-tubes and stay-tubes
   • C.external boiler plating
   • D.separate crown sheets
   Show answer

   B. fire-tubes and stay-tubes

   Q800, Junior Engineer, Part I

2. A tank has been sealed and unventilated for a long period of time. Which of the following statements is true?

   • A.Water vapor present when the tank was sealed has oxidized.
   • B.The tank is safe to enter.
   • C.The tank is especially dangerous to enter.
   • D.Carbon monoxide is present.
   Show answer

   C. The tank is especially dangerous to enter.

   Q801, Junior Engineer, Part II

3. In general, the thermal bulb for a thermal expansion valve used in a reciprocating air conditioning system is usually charged with what substance?

   • A.mercuric sulfate
   • B.bees wax
   • C.the same refrigerant as the system
   • D.distilled water
   Show answer

   C. the same refrigerant as the system

   Q801, Junior Engineer, Part II

4. The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent __________.

   • A.accidental dry firing and overpressure
   • B.uncontrolled fires in the furnace
   • C.explosions in the boiler furnace
   • D.overheating of the pressure parts
   Show answer

   C. explosions in the boiler furnace

   Q606, Chief Engineer Limited: Gas Turbine Plants

5. Fire detecting systems on merchant vessels may be arranged to sense __________.

   • A.ionized particles
   • B.rate of temperature rise
   • C.smoke
   • D.all of the above
   Show answer

   D. all of the above

   Q802, Electrician

6. When a refrigeration system is being topped off with a small amount of refrigerant through the low side with the compressor running, what should be done?

   • A.the refrigerant charging cylinder should be turned upside down
   • B.the discharge service valve must be front-seated
   • C.the suction service valve must be back-seated
   • D.the refrigerant should be charged into the system as a vapor
   Show answer

   D. the refrigerant should be charged into the system as a vapor

   Q803, Refrigerating Engineer

7. Which of the following fuel systems is characterized by a complete absence of high-pressure fuel lines?

   • A.Rotary plunger type system
   • B.Unit injector type system
   • C.In-line multi-plunger type system
   • D.Common rail type system
   Show answer

   B. Unit injector type system

   Q620, DDE Unlimited: Motor Plants

8. You notice smoke coming from an open laundry room doorway, which smells like electrical insulation. After activating the fire alarm, which of the following would be the lowest action priority?

   • A.Secure power to the washers and dryers.
   • B.Break out the nearest fire hose.
   • C.Close the door to the room.
   • D.Locate the nearest CO2 or dry chemical extinguisher.
   Show answer

   B. Break out the nearest fire hose.

   Q802, Electrician

9. Which of the following statements describes the characteristics of precision manufactured roller bearings?

   • A.They are not capable of maintaining alignment over long periods of time.
   • B.They are well adapted to variable speed operation.
   • C.They have a relatively high-power loss due to friction.
   • D.Their lubrication is complicated and requires constant attention.
   Show answer

   B. They are well adapted to variable speed operation.

   Q803, Refrigerating Engineer

10. When checking the crankcase oil level on a main propulsion engine on your fishing industry line vessel while underway, what should be the oil level as indicated on the dipstick?

    • A.The actual level is unimportant as long as it is visible on the dipstick when the engine is running.
    • B.The level should be between the "full" and "add" marks on the side of the dipstick marked with engine IDLE and oil HOT.
    • C.The level should be below the "add" mark on the side of the dipstick marked with engine IDLE and oil HOT.
    • D.The level should be well above the "full" mark on the side of the dipstick marked with engine IDLE and oil HOT.
    Show answer

    B. The level should be between the "full" and "add" marks on the side of the dipstick marked with engine IDLE and oil HOT.

    Q690, Assistant Engineer UFIV: Motor Plants

What the study guide does

• Short daily rounds of 10 questions, with a streak.
• Practice tests built like the real one, scored with the real pass marks (first one free, then $19 once for the full Exam Room).
• The Brig: questions you miss come back until you get them right twice.
• Pass Meter: your chance of passing every module if you sat it today, worked out from your own answers.