C5 - Manage operation of electrical and electronic control equipment

Which of the following is a disadvantage of an AC generator that has a low power factor?

Lead acid battery positive plate is made-up of __________.

Kilowatt load is divided between two DC generators operating in parallel by __________________.

When the voltage and the current in an AC circuit reach their peak value at the same time, the power factor is ?

If it is needed to convert a signal in one medium to a signal in another, such as pneumatic to electrical or pneumatic to hydraulic, what device should be applied?

Which of the following type of motors is used where uniform speed, regardless of load, is needed?

An assembly of a pneumatic one-way flow control valve consists of a check valve and a____

The phase shift between the current and voltage vectors us due to the following except:

Reactance will cause the current in a circuit to vary only when ?

Reducing the frequency in a capacitative circuit while holding voltage constant will result in a ?

In an AC generator, direct current from a separate source is passed through the windings of the rotor_____.

On some diesel-electric ships , the DC propulsion motor will only attain half speed when the generator fields are fully excited.Speeds above this are obtained by________.

Positive ions going to the negative electrode is called?

Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?

Counter EMF is measured in_______?

Effects of electron movement are the same regardless of the direction of____?

Which of the following refers to a bipolar transistor which utilizes an Ntype region which is sandwiched between two P-type regions?

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

In general, Zener diodes can dissipate more power if its leads are___________.

An alloy of nickel and copper used for thermocouple is called?

What type of level control system is fitted either on the top of the boiler drum or in a water chamber attached to a metal rod which activates magnetic switches for starting or stopping the pump or opening and closing of the feed valve?

Arrange the correct sequence of procedure for measuring insulation resistance of a HV equipment as described below. I. Close the earthing switch and make sure all the conductors are earthed. II. Confirm that all the phases are dead using an approved live line tester. III. After connecting insulation resistance (IR) tester to the circuit, safety earth is tobe disconnected. IV. Insulation resistance (IR) test is applied and recorded. V. Connect the insulation resistance (IR) tester to the conductor with safety earth connection ON. VI. Disconnect the power supply to the HV equipment by opening circuit breaker and opening isolator.

Which of the method listed is used to maintain equal load sharing between two compound wound DC generators operating in parallel?

The difference between the synchronous speed of an induction machine and its operating speed (slip) may be correctly expressed as __________________.

What type of level control system where a metal rod is suspended in the boiler water drum with electrical voltage along with an ammeter included in the circuit which can be used to control starting and stopping of the feed water pump or to open the feed water valve integrated with the level alarm?

What electric device is being connected between two generators of different capacities running parallel so that the running load is divided proportionally between the two?

In paralleling of two generators, what does it indicates if the synchronizing lamps remain lighted as the synchroscope pointer approaches the zero degree position?

The true power indicated by the pointer movement of a wattmeter depends on the current flow through the load, the magnitude of the potential across the load, and the ?

The most common source of excitation for synchronous motors is a/an .

Pneumatic directional valve symbols consist of either letters or the numbers 1, 2, 3, 4 and 5 as per DIN ISO 5599. What does the odd numbers represent?

A two-position single-point action controller has been adjusted to minimize cycling and would only be suitable for ?

Which of the following is true when a conductor reactance is compared to an alternating current relative to the flow in a resistance?

The loop of wire that rotates through and cut the magnetic fieldin a generator is called______.

In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in ?

The total resistance of a parallel circuit is always ________.

The purpose of the commutator and brushes on a DC generator is to_____.

The alarm system for an engine order telegraph uses small selsyn motors attached to the indicators.The alarm sounds when the rotors are______.

As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is______.

Hydrostatic pressure of a liquid column depends on __________.

In an AC synchronous motor electric propulsion plant, propeller speed is controlled by varying the_____.

Which of the following statements correctly applies to transistors?

In a diesel electric plant, raising the generator's field excitation will cause the DC propulsion motor to .

The electro-pneumatic circuit layout follows the signal flow through the control chain from bottom to top. However, the electric circuit elements are numbered following the direction of signal flow from __________________.

The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor______.

The D.C. Generator where the output is used to supply the field current is called_____.

What does a low system power factor in an alternating current electrical system directly indicates ?

What is the advatange of a highervoltage system as compared to a lower-voltage system?

What is the purpose of the compressed air regulator of a service unit in a pneumatic control system?

Why is it there is a less chance of making mistake during assembly of an integrated circuit because ?

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

The purpose of DC generator brushes is to .

How can a delicate component to be soldered in a circuit be protected from the heat of the soldering process?

The efficiency of a diesel engine is greatest at about 80% of maximum load. If a CPP is used, at which level, in general, the propeller efficiency is greatest?

A semi-conductor is a material with a _____________________.

How can you change the speed of a multi-speed, squirrel-cage induction motor operating in a fixed frequency system ?

To avoid damage in pulling out a defective PC board connector inside the group starter panel circuit board, it should be kept at _________.

Pneumatic directional valve symbols consist of either letters or the numbers 1, 2, 3, 4 and 5 as per DIN ISO 5599. What does the even numbers represent?

What kind of directional valve whose function is to control the direction taken by the fluid flow such that the flow is open in one direction and simultaneously blocked in the other?

The four basic primary levels of an electro-pneumatic system structure are energy supply, input elements, processing elements, and _____________.

In an electro-pneumatic control system, what component controls the passage of air signals from the input side of the element to the output side?

What is the main reason in using an electronic megger tester essentially for Polarization Index or PI test?

The running motor will automatically stop due to the loss of power supply if the blackout occurs and it will start again even without pressing the start push button because of __________ device.

Voltage generated by most AC genrators is fed from the machne to the bus by means of_____.

A 5/2-way directional valve has its own return flow from the actuators which can be used for other control purposes. What is best suited to be controlled by this directional valve?

Which of the following definitions best describes sensitivity as a characteristic of controller action?

The electrolyte of Nickel Cadmium battery is ____________.

What kind of electrical wiring configuration of a three-phase motor in which each winding is wired end to end to form a completely closed loop circuit, and at each of the three points where the phases are connected, a lead is brought out externally?

In the starting system of a large diesel engine, what controls the opening of the remote non-return main starting valve and the cylinder starting valves?

When compared to other component in an electronic circuit, the Integrated Circuit (IC) is ____________________.

Current measuring instruments must always be connected in ?

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

Capacitance in an AC circuit will ?

The conversion of a throttle command voltage to the signal necessary to achieve the desired shaft, RPM is accomplished by ________ .

Which directional valve can be applied to a pneumatic circuit that requires to keep or 'memorize' the last switching position unless an opposite control is given?

The alternating current produced in the generator windings is converted to direct current by the aid of ______.

What type of motor wherein as the motor speed is increased, so is the load output, and whose typical applications are fans, blowers, centrifugal pumps, mixers and agitators?

Low horsepower, polyphase, induction motors can be started with full voltage by means of ?

A displacer level sensor uses a _______________.

A multimeter may be damaged by taking a ________.

Capacitors are measured in __________________.

In a standard motor starter panel, a motor is started by pressing the start push button switch.This energizes a starting relay and a ?

The shunt used in an ammeter should be connected in .

Each hydraulic system must be fitted with a pressure relief valve downstream of the pump to prevent accidents and damage caused by excessive pressures. Spring loaded relief valves are used to adjust the working pressures and limit the operating pressures or are also employed as safety valves. What kind of relief valves are used whenever large volumes of hydraulic oils are involved?

What kind of electrical wiring configuration of a three-phase motor in which one end of each of the three phases is connected to the other phases internally, and the remaining end of each phase is then brought out externally and connected to the power line?

Regarding an 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 conpensated for by the______.

In a diesel engine starting air system, from the air receiver, where is the compressed air for starting supplied first before the cylinder air starting valve?

The simplest method of controlling the terminal voltage of compoundwound DC generator iis with a_____.

Negative ions going to the Positive electrode is called __________.

In an electro-hydraulic steering gear system, whenwill the variable displacement pump be placed on stroke?

Why is copper loss and iron loss less in high voltage system?

What type of motor often found on machines that have friction-type loads, such as conveyors, gear-type pumps, and load lifting equipment wherein the horsepower required increases when the speed increases?

If the relay coil is not "on" when all indicates that it should be energized with rated voltage measured across the coil is present, probably the cause would be ?

A forward-biased diode acts like a switch that is___________.

In which of the following mode does a (JFET) operates?

Before an insulation test is carried out inside the group starter panel circuit board, the wirings leading to the sensitive circuits shall be ?

Pneumatic directional valve symbols consist of either letters or the numbers 1, 2, 3, 4 and 5 as per DIN ISO 5599. What does number 1 represents?

Which of the following indicate the temperatures in AC generator?

What can be obtained in an open circuit if we use the instrument called megger tester?

What is the most inefficient method of voltage reduction from the stand point of power loss?

A medium pressure water tube boiler uses a level differential pressure transmitter to detect the actual level inside the drum. What signals are applied to the transmitter in order to detect the process parameter?

What safety device prevents the opening of the remote main starting non-return valve if the engine turning gear is engaged?

What is the ratio between the insulation resistance (IR) value measured after the application of the test voltage continuously for 10 minutes to the IR value measured after 1 minute of application?

External shunts are sometimes provided in ammeters to ______________.

What form of power loss is the result of resistance in a distribution circuit in heating of conductors?

The main engine reversing mechanism is tested by repeated changes from ahead to astern and vice-versa where after each change, the engine is started. What does this test provide?