QMED02 - Electrician-Refrigerating Engineer

When the compressed air reservoir is placed in line with an air compressor and is used as an aftercooler, what must be ...

Which of the listed devices would be installed in the air compressor discharge line between the compressor and receiver...

What type of grease is the most commonly used aboard ship?

At a minimum threshold, how many milliamps of current through the body produces a condition where most people would suf...

In general, what type of starter would be used to connect a three-phase induction motor to full line voltage at the ins...

If the compressor is heard to knock while pumping down the low side for repairs, but otherwise the compressor sounds no...

Which of the following methods should be used to test for an 'open' stator winding coil in a wye-connected AC squirrel ...

When purging a refrigeration gauge manifold using system pressure as the source of refrigerant for purging, which of th...

In testing a three-phase delta-connected winding for an open circuit using an ohmmeter, what must be done?

The gas that exists in the stratosphere forming a protective shield that helps to protect the environment from the harm...

As a firefighting medium, CO2 can be dangerous under certain conditions as it can cause ______.

When the relief valve opens on a refrigeration compressor discharge line, it discharges high-pressure refrigerant vapor...

When performing routine AC motor maintenance what should be included?

With respect to machine shop "taps and dies", a bottoming tap is correctly used for __________.

How can the loss of residual magnetism in an alternator or generator be corrected?

Zinc plates commonly found in refrigeration systems and used as sacrificial anodes are located where?

The use of a needle valve in a piping system is recommended when requiring __________.

To obtain a 1/2 inch per foot taper on an 18-inch workpiece, the tailstock of the lathe must be set over _________.

Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by the...

In a refrigeration system, what component is installed directly downstream of the thermal expansion valve?

If you hear the general alarm sounded 3 times supplemented by 3 short blasts of the whistle, what does this indicate?

Sea water or low temperature central fresh water is typically provided to a ship's stores refrigeration plant for what ...

How much is the nominal open-circuit voltage of one cell of a fully charged lead-acid battery?

When installing DANGER tags when performing a tag-out and lock-out procedure in preparation for accomplishing maintenan...

At a minimum threshold, how many milliamps of current through the body produces a condition where most people would exp...

What is the drive arrangement of refrigeration compressor shown in figure "B" of the illustration? Illustration RA-0041

If a lifeboat winch allows a lifeboat to descend to the water at an excessive speed, you should ________.

When repairing a refrigeration system, a swaging tool set would be used to carry out which of the following operations?

In performing routine maintenance of a ship's service alternator, what should be included?

According to 33 CFR, which type of Marine Sanitation Device (MSD) is used solely for the storage of sewage and flushwat...

What should be the primary consideration when choosing a battery for a particular application?

A typical common digital multimeter (DMM) can be used to measure what values?

In what application is a remote valve operator most likely to be located outside the machinery space when the valve its...

To find the relative humidity of an accommodation space, you would use a __________.

If the supply voltage is 220 volts 60 Hz, what is the operating voltage of the motor controller control circuit illustr...

What term represents the difference between synchronous speed and actual speed of a running AC induction motor?

In which figure shown in the illustration will the highest voltage be induced? Illustration EL-0028

Refrigeration systems using forced air circulation evaporators have a tendency to cause rapid dehydration of produce in...

In a simple DC circuit, the resistance is held constant while the applied voltage is halved. What will be the effect on...

What could be the cause of water hammer in a steam heating system?

Before working on an electric cargo winch master switch or controller, what should be done?

An increase in which of the listed conditions will increase the speed of a synchronous electric motor?

What happens to the current in a series circuit when the voltage remains constant and the resistance increases?

What statement best represents the characteristics of an innage tape and bob for the purposes of taking a vented tank s...

What is the characteristic of the blood flow associated with arterial bleeding?

The tool used to prepare copper tubing for the installation of fittings is called a _________.

What device can be used to check the calibration of a circuit breaker?

Remote valve operators are frequently fitted with a handwheel for local operation if the motor fails. If this is so, wh...

What is the combined effect of inductive reactance, capacitive reactance, and resistance in an alternating current circ...

When one belt of a multiple V-belt drive requires replacing, what will be required?

Which line in figure "B" shown in the illustration represents the trailing edge of the wave? Illustration EL-0088

In a compression type automatic grease cup, the lubricant is forced into the bearing by __________.

If an attempted light off of an idle boiler fails, what should be done?

Bottom blow valves are installed on auxiliary water-tube boilers to _______.

Aqueous Film Forming Foam (AFFF), commonly known as "light water", is especially suitable for fighting __________.

What is one benefit of maintenance of proper air circulation in an air-conditioned cargo space?

What is the functional name of an electrical device which prevents performing two or more actions which will result in ...

Which of the precautions listed should be taken before opening any part of a refrigeration system for the purpose of ac...

Which of the valves listed for the device shown in the illustration will be open while the unit is operating in the bac...

If the valve labeled "D" in the illustration is a suction service valve, what will the port labeled "7" be connected to...

As shown in figures "B" and "C" of the illustration, what should be the switch position and which test lead terminal ja...

If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, what is the probable ...

What is the power consumed by "R2" in the circuit illustrated in figure "B", if the applied voltage is 24 volts and the...

Inhalation of high concentrations of chlorofluorocarbon refrigerants (CFCs) may have which of the following effects?

Which of the following statements represents the important factor that must be considered when replacing a faulty diode...

In DC motor construction, where are the commutating windings wound?

The electrolyte used in a nickel-cadmium battery is distilled water and what other substance?

The crosshatch design on the end of piece "3" in the illustration shown indicates that _______. Illustration GS- 0020

A definite advantage in the use of water as a fire extinguishing agent is its ability to __________.

Why can CFC or HCFC refrigerants leaking into a confined space or in limited surroundings cause suffocation?

A direct current passing through a wire coiled around a soft iron core is known as what?

Copper coil tubing is best cut with a _________.

Whether analog or digital, what are most AC voltmeters calibrated to measure?

Concerning frost appearing on one set of evaporator coils of a multi-box, direct expansion type refrigeration system, w...

A thermal-magnetic circuit breaker for a 300 kW alternator is rated at 500 amperes at full continuous load. Which of th...

What statement below summarizes an engine lubricating oil's viscosity given as 20W-50?

If a sea water-cooled shell-and-tube lubricating oil cooler has the sea water inlet and outlet connections on the oppos...

If the combination moisture indicator and sight glass indicates an accumulation of moisture within the system, which of...

An increase in which of the listed conditions will increase the speed of a synchronous electric motor?

A reheater in an air conditioning system performs what function?

AC circuits can possess characteristics of resistance, inductance, and capacitance. In terms of units of measure, how i...

To prevent overheating and scoring of the shaft after repacking the stuffing box, which of the following procedures sho...

In comparing a semiconductor diode to a vacuum tube diode, what statement is true?

When replacing a thermostatic expansion valve power element, what is true concerning the thermal bulb?

At a minimum threshold, how many milliamps of current through the body produces a painful sensation that most people wo...

When opening or closing compressor service and line isolation valves on a typical refrigeration system that is fitted w...

What is the characteristic of a wound-rotor induction motor, with a high resistance inserted in series with the rotor w...

Which recovery procedure should be used to minimize the loss of oil from the system during the recovery of refrigerant ...

Why is it important for double bottom fuel oil tanks not to be topped off when loading fuel at cold temperatures?

As shown in the illustrated DC machine which is configured as a generator, what is the purpose of the interpoles? Illus...

For what purpose are time delayed or delayed action-type fuses used?

By what criteria are hard hats (protective helmets) rated?

In a compression type automatic grease cup, the lubricant is forced into the bearing by __________.

Which of the following precautions should be taken when troubleshooting various power circuits using a digital multimet...

The Muster List ("Station Bill") shows each crew lifeboat station, their duties during abandonment, basic instructions,...

When removing the primary refrigerant from a system using water as a secondary refrigerant, it is important to follow w...

The discharge capacity of the axial piston hydraulic pump, shown in the illustration, is _______. Illustration GS-0058

In general, the thermal bulb for a thermal expansion valve used in a reciprocating air conditioning system is usually c...

The FIRST requirement for logical troubleshooting of any system requires the troubleshooter to do what?

On vessels exceeding 1600 GRT, who is responsible for the practical upkeep of machinery and the manning of the engine r...

When troubleshooting a lead-acid storage battery, what is the best method for detecting a weak or dead cell?

The motor fails to start on an attempted startup. With the start button depressed, a voltmeter reading between 1 and 5,...

What statement is true concerning portable power tools?

Low compressor head pressure in a refrigeration system can be caused by which of the following?

After extinguishing a paint locker fire using the fixed CO2 system, the next immediate action is for the space to be __...

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

If the bearings of a piece of machinery are fed by a gravity feed lubricating oil system, what statement is true?

A refrigeration compressor used in a multi-box refrigeration system, is designed with six of its eight cylinders able t...

In actual applications, electrical connections associated with "R1, R2 and R3" of the transmitter to "R1, R2, and R3" o...

At a minimum threshold, how many milliamps of current through the body produces a condition where most people would exp...

To minimize magnetic field interaction between electrical conductors in physical proximity, what is the best practice?

To minimize magnetic field interaction between electrical conductors in physical proximity, what is the best practice?

It is necessary to cool the bulkheads and decks surrounding a compartment where there is a fire in order to __________.

If a delicate component must be soldered into a circuit, how can the component be protected from the heat of the solder...

You are paralleling two alternators. The synchronizing lamps grow dim and are totally darkened as the synchroscope poin...

What is true concerning frost build-up on the evaporator coils of a multi-box direct expansion refrigeration system?

The simplest method to use for determining if a centrifugal pump is operating as designed, is to ________.

Concerning the proper installation of the sensing bulb of a thermal expansion valve that is attached to the evaporator ...

An internal resistance is placed in series with the meter movement of which of the following instruments?

What material is most commonly used as a sacrificial anode for the purposes of minimizing the galvanic corrosion of ste...

Which of the listed instruments can be best used to locate a grounded stator coil in a synchronous motor onboard ship?

The portion of a hydraulic hose that determines its overall strength, is the _______.

What does the component labeled "B" shown in the illustration represent? Illustration EL-0093

Which of the hand valve configurations for the gauge manifold set is the correct set up for monitoring both the low and...

The illustrated drawing shows a correct front "F" and top "T" view of an object. Of the views labeled "1","2","3", and ...

With a service gauge manifold set connected to a refrigerant compressor as shown in the illustration, which arrangement...

In a three-phase, squirrel-cage type, induction motor, how is the primary rotating magnetic field established?

An inadequate reciprocating bilge pump discharge is most often caused by_______.

In a compartment that has been completely flooded with water, the greatest pressure will be exerted _________.

If there is a "large" release of R-134a refrigerant gas in a confined area, which of the following statements would be ...

In preparing the surface of a metal for application of primers and finish coats, which of the listed hand tools is appro...

If both the shell-and-tube lube oil cooler and shell-and-tube jacket water cooler of a diesel engine are sea water-cool...

The hand brake of a lifeboat winch is _________.

On a ship with a continuously manned engine room, with a three-person watch rotation, what is the watch and rest period...

Some heavy-duty screwdrivers are made with a square shank to _________.

What differentiates "system-dependent" and "self-contained" recovery devices in refrigeration systems?

When fighting a fire with a portable dry chemical extinguisher you should always __________.

During tests to discover why a refrigeration compressor is running continuously, it is determined that the refrigerated ...

All portable electric tools should have a ground connection to prevent __________.

Leaking suction valves in a refrigeration compressor are indicated by which of the following?