QMED Practice Test

1. 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?
2. 2. According to the temperature/enthalpy diagram for water at atmospheric pressure, if the substance is undergoing a heat gain, what heat transfer process is repre...
3. 3. According to the illustrated main and auxiliary diesel engine cooling water systems diagram, which of the following heat exchangers uses high temperature fresh...
4. 4. The best indication that a bearing is being properly lubricated is by the __________.
5. 5. The load is always placed on the lower half of the main bearings in a/an __________.

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1. 1. What is the power consumed by "R2" of the circuit illustrated in figure "B", if the applied voltage is 24 volts and the resistance of R1 is 3 ohms, R2 is 4 ohms...
2. 2. Petroleum vapors are dangerous __________.
3. 3. The blade for a power hacksaw should be installed with the teeth __________.
4. 4. The advantage of using a dry chemical fire extinguishing agent is __________.
5. 5. 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?

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1. 1. When the compressed air reservoir is placed in line with an air compressor and is used as an aftercooler, what must be done with the reservoir?
2. 2. What type of grease is the most commonly used aboard ship?
3. 3. In general, what type of starter would be used to connect a three-phase induction motor to full line voltage at the instant of start-up?
4. 4. Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel cage induction motor?
5. 5. In testing a three-phase delta-connected winding for an open circuit using a ohmmeter, what must be done?

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1. 1. If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the _______...
2. 2. Refrigeration systems using forced air circulation evaporators have a tendency to cause rapid dehydration of produce in chill boxes. Which of the following will...
3. 3. Which of the following conditions would most likely lead to the failure of a resistor due to overheating?
4. 4. What is the pressure and condition of the refrigerant entering the receiver of a refrigeration system?
5. 5. Which of the following thermometers provides a remote display of temperature on a rotary dial scale and works on the principle of thermal expansion?

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1. 1. The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust __________.
2. 2. Which of the following automatically actuates the overspeed tripping device installed on an auxiliary turbine?
3. 3. Diesel engines powering large vessels that directly drive fixed-pitch propellers are of what type?
4. 4. High pressure steam drains are normally discharged to the __________.
5. 5. The load is always placed on the lower half of the main bearings in a/an __________.

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1. 1. For any piece of equipment requiring lubrication, what is the single most important lubricating oil property in meeting the operating conditions?
2. 2. Before boring a blind tapered hole, a good shop practice to follow is to __________.
3. 3. At a minimum threshold, how many milliamps of current through the body produces a condition where most people would experience respiratory paralysis and be unab...
4. 4. To remove a hand-held right-handed straight cut reamer after it has gone all the way through a hole, you should __________.
5. 5. Which of the following methods is a convenient and effective system of examining the body of an injury victim?

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1. 1. The principal personnel hazard unique to Halon fire extinguishers is _________.
2. 2. High concentrations of hydrogen sulfide gas are most dangerous to personnel because they can __________.
3. 3. You have just extinguished an oil fire on the floor plates of the engine room with a 15-pound CO2 extinguisher. Which of the listed dangers should you now be pr...
4. 4. When you have completed bunkering operations, the hoses should be __________.
5. 5. If vomiting occurs during a resuscitation effort, the best immediate procedure to follow is __________.

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1. 2. According to 33 CFR, which type of Marine Sanitation Device (MSD) is used solely for the storage of sewage and flushwater at ambient air pressure and temperatur...
2. 3. The external flotation bladder on an immersion suit should be inflated __________.
3. 4. Which of the following conditions represents a particular advantage of using a positive pressure type self- contained breathing apparatus in an atmosphere that...
4. 5. In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by ____________.
5. 6. Steel-toed safety shoes are recommended for many types of work. What type of work activity would be an exception to the rule and where steel-toed shoes would NO...

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1. 1. Fire hoses located at protected fire stations must always be __________.
2. 2. A person manning a fire hose under pressure with an all-purpose nozzle attached should be aware that the nozzle is most difficult to control when the handle pos...
3. 3. Under what circumstances could equipment be operated when tagged with DANGER tags?
4. 4. Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine?
5. 5. The load is always placed on the lower half of the main bearings in a/an __________.

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