In a three-phase electrical system, three ground detecting lamps are provided. One lamp goes dark and the others increase in brightness. When the test button is pushed, all lamps have equal illunination. You should called that ______.

When troubleshooting an electronic circuit, a cold solder joint can be located with the aid of an ohmmeter. Once the problem has been located, what should you do next?

What do you call the emission of electrons from hot bodies?

When electrocuted, how much current may lead to loss of muscular control?

Why is corrosion due to electrolytic action in modern water-tube boilers is uncommon?

When troubleshooting an electronic circuit, a cold solder joint can be located with the aid of an ohmmeter. Once the problem has been located, what should you do next?

Which of the following may cause a single-phase induction motor fails to start?

Silicon diodes designed for a specific reverse breakdown voltage, become useful as an electronic power supply voltage regulator, called ____.

The purpose of checking the electrical installations, equipments, etc. using a megger tester?

A low - voltage protection circuit is used in electric motor starting equipment to ______.

Which of the following statements describes the significance of ambient temperature in relation to the service life of electronic components?

To be considered as High Volatge system used on board a ship, how much should be the minimum voltage?

When trouble shooting electronic equipment, the first step to be taken before testing the circuit voltage is to ______.

When the voltage and current developed in AC circuit reached thier peak value at the same time, the power factor is ?

What is the use of a magnetic blowout coil in a ship,s crane using DC motor controller contactor?

What utilizes a pure transducer utilizes?

Which of the following values of the waveforms measured in ammeters and voltmeters?

To be considered as High Volatge system used on board a ship, how much should be the minimum voltage?

The amount of sodium phosphate in treated boiler water can be measured by ?

In SF6 circuit breakers what is the meaning of SF6?

What do you call a conductor carrier opposite to the majority current carrier which are represented by the holes in n-type material and free electrons in p-type material?

When paralleling two alternators, the synchronizing lamps remain lit as the synchroscope pointer approaches the 0° position. This indicates the?

On a vessel with turbo-electric drive, which of the following conditions would indicate that the propulsion motor had cut-out from synchronization with the propulsion generator?

The total heating surface of any steam generating unit is comprised of?

In process control terminology values which can change without distinct increments. such as temperature, pressure or level are called

What do you call a directional lighting to emphasize an object or draw attention to a part of the field view

To provide its unique characteristics to analog circuits, the operational amplifier is made up of a/an _____.

How is the operator ensured that he is not in contact with any unearthed conductor before insulation resistance (IR) measurement of a HV system?

In electronic industry, the abbreviation "PCB commonly means ____.

The following are main things you should ccheck when synchronizing a generator except for?

All portable electric tools should have a ground connection to prevent?

What determines the power factor of an electrical distribution system being supplied by a single AC generator?

When trouble shooting most electronic circuits. "loading effect" can be minimized by using a volt volt meter with a/an ______.

For a galley equipment the molded case breaker that provide protection against short circuits uses a/an _____?

How can the hot spots in the bus bar or surrounding area be checked safely?

Which of the listed pairs of materials make the best insulators?

What will happen if a low impedance connection is accidentally created across a charged capacitor within a high-voltage electrical network?

In general, polyphase induction motors can be started on full line voltage by what means?

Re-circulating of the feed water ensures a flow of water through?

The ground indicating light on the main electrical switchboard is indicating a ground. The best procedure for locating gounded circuit is to _____.

Which of the following statements represents an application of a silicon controlled rectifier?

You are attempting to parallel two AC generators, and the synchroscope pointer is revolving past in the clockwise direction. What indicates that the frequency of the incoming machine?

Regarding and AC generator connected to the main electrical bus; as the electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. These changes in armature reaction are compensated for by the ______.

On an engine throttle control system, the auxiliary control circuits are provided with devices to prevent excessive over travel of the pilot valve by the synchronous motor. These devices are called_____.

Which of the following problems will most likely occur if the starting winding of a split- phase induction motor failed to cutout once the motor was in continuous operation?

When trouble shooting electronic equipment, you should use a high impedance multimeter ______.

In a simple DC circuit, the resistance is held constant when the applied voltage is halved. Current flows therefore will ______.

A ship is generating 8MW of power at 440V from 4 diesel generator of 2MW 0.8 power factor each. How much full-load current each generator feeder cable and circuit breaker be able to handle?

What is the degree angle when the voltage and current are out of phase so that the true power is equal to zero?

When a solid-state component of an electronic circuit is mounted to a metalic mass, the general purpose of that mass is to _____.

Which of the following refers to a characteristics of a magnetic line of force?

A loss of field excitation to an AC generator while operating in parallel will cause to _____ .

What do you call a motor using a rheostat in the mnotor circuit to vary the speed?

Which of the following statements is true concerning a polyphase synchronous propulsion motor?

What is the part of a transformer which function is to deliver the load received?

Identify factor that determines the frequency of an alternator?

Ammeters and voltmeters use in a sinusoidal AC power system indicates which of the following values of the waveforms measured?

It is defined as the movement of electrical charge (the flow of electrons) through an electrical circuit is called?

What is being used to indicate whether the alternator is running faster or slower than the ther. What is this device installed in the main switchboard?

RTD type sensor utilizes which principle in temperature measurement?

Listed are the types of circuit breakers except?

The dielectric strength of transformer oil is expected to be ______?

When trouble shooting electronic equipment, you should use a high impedance multimeter ______.

To locate a grounded field coil in a synchronous motor, which of the instruments listed could be used?

What represents an application of a silicon controlled rectifier?

When using an ohmmeter to test a semi conductor diode, you find a low resistance in both forward and reverse bias direction. This indicates that the diode is _____

What is the part of the shipboard electrical system used to control the distribution of power to the branch circuit?

It is a type of motor that is almost the same as an alternator.

When troubleshooting an electronic circuit, a cold solder joint can be located with the aid of an ohmmeter. Once the problem has been located, what should you do next?

Ships fitted with high-voltage installations tend to use earthed neutral electrical networks. Which one of the following best describes how excessive fault currents are prevented in the event of an earth fault on these ships?

Prior to starting an AC generator prime mnover, the voltage regulator cut out switch should be placed in which of the following position?

A ship is generating 8MW of power at 440V from 4 diesel generator of 2MW 0.8 power factor each. How much full-load current each generator feeder cable and circuit breaker be able to handle?

What is the transformer winding where power source is connected?

In a cross-compound main propolsion unit, the astern turbine is usually INSTALLED WHERE?

The capacitance is measured in ?

a triac thyristor functions as a control device and is basically ______.

What type of widely used thermocouple, also termed as Ni-Chromium/Ni-Alumel, with enhanced reliability, preciseness, inexpensive and operate at temperature ranges between -270 to 1,260 degC?

In synchronizing a generator with other generator, it is required that the voltage and frequency of the incoming generator is _____.

What do you call a direct current passing through a wire coiled around a soft iron core?

On a vessel with turbo-electric drive, which of the following conditions would indicate that the propulsion motor had dropped out from synchronization with the propulsion generator?

Depending upon the design of boiler, the constant pressure maintained at the steam drum or the superheat outlet is known as?

Which of the following is developed whenever there is a relative motion of action between a magnetic field and a conductor?

A ground on a particular phase of a three phase low voltage system would be indicated by?

Why is it necessary to measure bolted bus bar joint resistance?

What would you obtain if you measure voltage and current in an inductive or capacitive circuit and then multiply them together?

An instantenous trip type fuse will?

Which of the stated pressure conditions identifies the boiler design pressure?

To minimize magnetic field interaction between electrical conductors in physical proximity, it is best to keep them?

How would you show your understanding to a communication device that allows to talk to each other with the use of a handset, similar to a conventional telephone but without the use of external power ?

How can you determine if a circuit breaker is tripped?

Two paralleled alternators are operating near rated load. If one trips out mechanically, which of the listed actions should be taken first?

When trouble shooting electronic equipment, the first step to be taken before testing the circuit voltage is to ______.

What might be the cause if an electric motor of an electric driven compressor fails to start?

Determine the main difference of marine high voltage installaqtion compared to low voltage installation onboardship.

What cause the main feed pump which can handle high temperature water without becoming vapor bound?

The magnetic energy of a transformer when created will further induced current in the ?

A field effect transistor function that reduces number of current carries passing through its channel ______.

What do you call a conductor carrier opposite to the majority current carrier which are represented by the holes in n-type material and free electrons in p-type material?

Which one of the following is best described as the combinations of electrical disconnect switches and circuit breakers that are used to control, protect and isolate high-voltage electrical equipment?

The following are rating of circuit breakers except ______.