First Assistant Engineer Unlimited Practice Test (1AE01)

Second in the engine room on ships of any horsepower: steam, motor and gas turbine plants, electrical, safety and pollution rules. Coast Guard exam code 1AE01.

478 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. If you attempt to tighten a leaking hydraulic fitting with pressure on the system, you will __________.

   • A.cause the system to vibrate
   • B.be successful every time
   • C.find that the pressure will prevent the components from being tightened
   • D.dislodge any scale in the tubing, and it will damage the system
   Show answer

   C. find that the pressure will prevent the components from being tightened

   Q601, Chief Engineer Limited: General Subjects

2. 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

3. On a boiler safety valve, the blowdown adjusting ring is locked in place by a __________.

   • A.wire seal
   • B.cotter pin
   • C.set screw
   • D.locknut
   Show answer

   C. set screw

   Q605, Chief Engineer Limited: Steam Plants

4. Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are __________.

   • A.automatically supplied with warmer air on demand
   • B.automatically supplied with more fuel on demand
   • C.equipped with standard variable capacity atomizers
   • D.cycled on and off in response to steam demand
   Show answer

   D. cycled on and off in response to steam demand

   Q805, Oiler, Part II

5. An exhaust gas bypass is installed on a waste heat boiler in order to __________.

   • A.bypass exhaust gas at high loads to prevent excessive back pressure
   • B.bypass a portion of the exhaust gas at peak loads for better efficiency
   • C.recycle exhaust gas to the turbocharger
   • D.minimize moisture condensation in the boiler gas passages at low loads
   Show answer

   D. minimize moisture condensation in the boiler gas passages at low loads

   Q800, Junior Engineer, Part I

6. Which extinguishing agent is the best for use on electrical fires?

   • A.Water fog
   • B.CO2
   • C.Dry chemical
   • D.Foam
   Show answer

   B. CO2

   Q451, Deck General / Safety

7. A three-phase, induction-type motor experiences an open in one phase. Which of the listed automatic protective devices will prevent the motor from being damaged?

   • A.Magnetic blowout coil
   • B.Thermal overload relay
   • C.Three-pole safety switch
   • D.Overspeed trip
   Show answer

   B. Thermal overload relay

   Q604, Chief Engineer Limited: Electrical, Electronics & Control

8. Overheating of the oil in a hydraulic system can be caused by __________.

   • A.insufficient external pump slippage
   • B.fluctuating pump discharge pressure in response to normal load variations
   • C.an increase in the number of the hydraulic fluid film layers
   • D.continuous leakage through the pressure relief valve
   Show answer

   D. continuous leakage through the pressure relief valve

   Q601, Chief Engineer Limited: General Subjects

9. What is the purpose of running a refrigeration compressor in short intermittent spurts or throttling the suction isolation valve when starting the system after a prolonged shutdown?

   • A.let the refrigerated compartment cool gradually
   • B.allow refrigerant vapor cycling time
   • C.determine actual compressor oil level
   • D.prevent liquid slugging or overloading the compressor
   Show answer

   D. prevent liquid slugging or overloading the compressor

   Q803, Refrigerating Engineer

10. Which of the listed mediums should be used when water washing a boiler?

    • A.Heated salt water
    • B.Cold fresh water
    • C.Heated fresh water
    • D.Cold salt water
    Show answer

    C. Heated fresh water

    Q605, Chief Engineer Limited: Steam 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.