QMED Junior Engineer Practice Test

The all-round engine rating: motor and steam plants, boilers, electrical and safety. Coast Guard exam code QMED01.

113 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

10 sample questions

1. What is used to prevent contamination of a potable water system supplying a plumbing fixture such as a galley sink from a backup of sewage sanitary drains?

   • A.Location of the potable water spigots below the rim of the galley sink.
   • B.A "P" trap in the drain line draining sewage waste from the galley sink.
   • C.Location of the potable water spigots above the rim of the galley sink.
   • D.Check valves in the potable water supply lines delivering water to the galley sink.
   Show answer

   C. Location of the potable water spigots above the rim of the galley sink.

   Q800, Junior Engineer, Part I

2. You have abandoned ship and are in charge of a liferaft. How much water per day should you permit each occupant to drink after the first 24 hours?

   • A.1 quart
   • B.1 gallon
   • C.1 pint
   • D.1 can
   Show answer

   C. 1 pint

   Q445, Lifeboat Operator

3. The best indication that a bearing is being properly lubricated is by the __________.

   • A.oil temperature leaving the lube oil cooler
   • B.oil pressure at the lube oil pump discharge
   • C.lube oil strainer condition during cleaning and inspection
   • D.oil temperature indicated by the bearing thermometer
   Show answer

   D. oil temperature indicated by the bearing thermometer

   Q800, Junior Engineer, Part I

4. Petroleum vapors are dangerous __________.

   • A.only if the oxygen concentration is below 16 percent
   • B.only if the vapor is between the upper and lower explosive limit
   • C.only if the source of the vapor is above its flash point
   • D.at all times due to their toxicity
   Show answer

   D. at all times due to their toxicity

   Q801, Junior Engineer, Part II

5. The load is always placed on the lower half of the main bearings in a __________.

   • A.two-stroke cycle engine
   • B.four-stroke cycle engine
   • C.reverse cycle engine
   • D.double acting engine
   Show answer

   A. two-stroke cycle engine

   Q800, Junior Engineer, Part I

6. The blade for a power hacksaw should be installed with the teeth __________.

   • A.pointing toward the motor end of the machine
   • B.pointing either toward or away from the motor end of the machine
   • C.pointing toward the motor if using a 4 or 6 tooth blade and away from the motor if using a 10 or 14 tooth blade
   • D.pointing away from the motor end of the machine
   Show answer

   A. pointing toward the motor end of the machine

   Q801, Junior Engineer, Part II

7. When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by __________.

   • A.the immediate increase in hydraulic pressure
   • B.the overrunning clutch
   • C.closing the starting check valves
   • D.the pivoting of the shaft from being engaged with the flywheel
   Show answer

   B. the overrunning clutch

   Q800, Junior Engineer, Part I

8. The advantage of using a dry chemical fire extinguishing agent is __________.

   • A.its excellent cooling ability
   • B.permanent extinguishment regardless of the reignition sources
   • C.its good stability and non-toxicity
   • D.all of the above
   Show answer

   C. its good stability and non-toxicity

   Q801, Junior Engineer, Part II

9. What will be the FIRST thing to occur if both the main and standby lube oil pumps failed to operate on a geared main propulsion steam turbine operating at full sea speed?

   • A.Ahead throttle will close.
   • B.Vacuum will be lost.
   • C.Shaft brake will engage.
   • D.Lube oil sump will overflow.
   Show answer

   A. Ahead throttle will close.

   Q800, Junior Engineer, Part I

10. When installing DANGER tags when performing a tag-out and lock-out procedure in preparation for accomplishing maintenance, what is the color of these tags?

    • A.Orange
    • B.Yellow
    • C.Red
    • D.Green
    Show answer

    C. Red

    Q801, Junior Engineer, Part II

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.