Description : Diesel generators #1 and #2 are operating in parallel at near full load capacity. Diesel generator #1 suddenly trips out mechanically due to low lube oil pressure. The reverse power relay functions ... all nonvital circuits. D. Secure alarms, reset reverse power relay, and restart #1 engine.
Last Answer : Answer: C
Description : As a result of a mechanical malfunction in one of the ship's service generators operating in parallel, you must secure that generator. In order to prevent a possible overload to the ... feeder circuit breakers, the malfunctioning prime mover turbine throttle trip, and the generator circuit breaker.
Last Answer : Answer: B
Description : A USB communication device that supports data encryption for secure wireless communication for notebook users is called a a) USB wireless network adapter b) wireless switch c) wireless hub d) router e) None of these
Last Answer : a) USB wireless network adapter
Description : If a switch must be checked with power applied, what type of meter is used?
Last Answer : A voltmeter.
Description : . What is the normal source of dry air for a radar system?
Last Answer : Ship's central dry-air system
Description : A precautionary landing is a procedure that: a. Enables the aeroplane to land at the destination with unserviceabilities that prevent a normal instrument approach being carried out b. Enables a ... not properly lowered d. Is carried out in the event of landing at an alternate aerodrome
Last Answer : b. Enables a landing after the declaration of a state of emergency or urgency
Description : The device which allows reverse power flow and withstands highest switch frequency is (A) GTO (B) MOSFET (C) IGBT (D) Inverter grade SCR
Last Answer : The device which allows reverse power flow and withstands highest switch frequency is MOSFET
Description : IE Users, will the German Government warning about security flaws in IE cause you to switch browsers?
Last Answer : I do not use IE except for applications that are maximized for it.
Description : There are 10 users plugged into a hub running 10Mbps half-duplex.and a server connected to the switch running 10Mbps half- duplex as well. Find the bandwidth does each host have to the server? a. 100 kbps b. 1 Mbps c. 2 Mbps d. 10 Mbps
Last Answer : d. 10 Mbps
Description : You want to lock your computer if you are connected to a network domain, or switch users if you are not connected to a network domain, you will press: a) Window + M b) Window + L c) Window + Q d) None of These
Last Answer : b) Window + L
Description : What happens if a soldering gun switch is pressed for periods longer than 30 seconds?
Last Answer : It will overheat and could burn the insulation of the wire being soldered.
Description : What type of bias makes a diode act as a closed switch?
Last Answer : Forward bias.
Description : If the ignition switch is placed in the ON position and all the engine instruments operate properly except the gas gauge, where would the fault probably be?
Last Answer : Between point (3) and the gas gauge tank unit ground.
Description : When cleaning the parts of a tape transport, why should you switch lint-free cloths and swabs often?
Last Answer : You may transfer dirt or oxide particles from one part of the tape transport to another
Description : What two types of meters can be used to check a switch?
Last Answer : An ohmmeter and a voltmeter.
Description : What is the voltage rating of a switch?
Last Answer : The maximum voltage allowable in the circuit in which the switch is installed.
Description : What is the current rating of a switch?
Last Answer : The maximum current a switch is designed to carry.
Description : What is the common name used for an accurate snap acting switch?
Last Answer : A microswitch.
Description : What type of switch is used if it is necessary to guard against a circuit being accidentally turned
Last Answer : A locked-position switch.
Description : What type of switch should be used to control a circuit that requires a temporary actuation signal?
Last Answer : A momentary switch.
Description : In describing a switch by the number of positions of the actuator, what are the two possible configurations for a single pole, double-throw switch?
Last Answer : Two-position and three-position.
Description : What classification of a switch is used when you describe it as a rocker switch?
Last Answer : The type of actuator.
Description : What is one example of an automatic switch?
Last Answer : A thermostat, an automobile distributor, a limit switch, etc.
Description : What is one example of a manual switch?
Last Answer : A light switch, an ignition switch, television channel selector, etc.
Description : What is the difference between a manual and an automatic switch?
Last Answer : A manual switch must be turned on or off by a person. An automatic switch turns a circuit on or off without the action of a person
Description : What is the name of the device that provides an increase in current, voltage, or power of a signal without appreciably altering the original signal?
Last Answer : Amplifier.
Description : Why do end users perform fiber geometry measurements in the laboratory?
Last Answer : To reduce system attenuation and coupling loss resulting from poor fiber fabrication.
Description : The heaters for the winch circuit shown in the illustration are powered from _____________. EL-0102 A. a separate source B. the winch main bus C. the master switch power circuit D. the contactor control circuit
Last Answer : Answer: A
Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?
Last Answer : Shorting probe.
Description : A series circuit consists of two resistors in series. R1 = 25 ohms and R2 = 30 ohms. The circuit current is 6 amps. What is the (a) source voltage, (b) voltage dropped by each resistor, (c) total power, and (d) power used by each resistor?
Last Answer : (a) 330 volts. (b) E1 = 150 volts. E2 = 180 volts. (c) 1.98 kilowatts. (d) P1 = 900 watts. P2 = 1.08 kilowatts component but in a parallel circuit total current divides among the available paths.
Description : What condition gives maximum power transfer from the source to the load?
Last Answer : When the load resistance equals the source resistance.
Description : Power for the electronic digital multimeter is normally supplied by what internal power source?
Last Answer : Rechargeable batteries.
Description : Which connector should you use to connect the (a) power source and (b) load to the fuseholder shown in figure 2-12(A)?
Last Answer : a. Center connector b. Outside connector
Description : What factors should be considered when selecting a primary cell for a power source?
Last Answer : Cost, size, ease of replacement, and voltage or current needs. b. Capacitance is the property of a circuit which opposes changes in voltage.
Description : How is emergency power applied when normal power is lost?
Last Answer : Automatically.
Description : In accordance with Coast Guard Regulations (46 CFR), a steering gear feeder circuit from the emergency switchboard or alternate power supply must have the capacity for continuous operation of the rudder 15° side to side in not more than 60 seconds for a A. 1/4 hour B. 1/2 hour C. 1 hour D. 2 hours
Description : In the event of cabin depressurization, the actions of the pilot will be to: a. Immediately commence a diversion to a suitable alternate b. Increase engine power to provide additional ... a descent to an altitude where the supplemental oxygen supply is sufficient for all crew and passengers
Last Answer : d. Commence a descent to an altitude where the supplemental oxygen supply is sufficient for all crew and passengers
Description : The device used to change the speed of an electric fan is – (1) Amplifier (2) Regulator (3) Switch (4) Rectifier
Last Answer : (2) Regulator Explanation: A voltage regulator is designed to automatically maintain a constant voltage level. A voltage regulator maybe a simple "feedforward" design or may include negative feedback ... power supplies where they stabilize the DC voltages used by the processor and other elements.
Description : A fuse will 'blow' if _____________. A. an electric motor is stopped suddenly by opening a switch B. the flow of current to the protection device is reversed C. the electrical current exceeds the rated value of the fuse D. unequal resistors are connected in parallel
Description : When attempting to measure a current of less than 10 amps with the device shown, the range switch should be set to ___________. EL-0047 A. 500 MA B. 10 MA / AMPS with leads in the (-COMMON) and (+) jacks C. 10 MA ... ) and (+10 A) jacks D. 10 MA / AMPS with leads in the (-10 A) and (+10 A) jacks
Last Answer : Answer: D
Description : When attempting to measure AC current with the device shown and you are unsure of the range, the range switch should be set to __________. EL-0047 A. 10 MA / AMPS with leads in the (-10 A) and ... (-COMMON) and (+10 A) jacks D. unable to accurately measure AC current with this device as illustrated
Description : If reading the AC voltage from a typical wall outlet, the range switch of the device illustrated should be set to ___________. EL-0047 A. 1,000 V B. 250 V C. R X 10,000 D. 10 ma/amps
Description : As shown in the illustration, the circuit has been on the line for several days when component 'E1' burns out. The operator receives an alarm, switches over 'B' to energize the standby ... than required for the circuit therefore limiting the current through the alarm relay which will not pick up
Description : What device in a waveguide system used for stopping or diverting electromagnetic wave as desired? A. Mechanical switch B. Electric switch C. Push-button switch D. Waveguide switch
Last Answer : D. Waveguide switch
Description : What device separates asingle network into two segmentsbut lets the twosegments appear as one tohigher protocols? A. Switch B. Bridge C. Gateway D. Router
Last Answer : Bridge
Description : Which of the following devices takes data sent from one network device and forwards it to the destination node based on MAC address ? a. Hub b. Modem c. Switch d. Gateway
Last Answer : c. Switch
Description : What is the central device in star topology? a. STP serve b. Hub/switch c. PDC d. Router
Last Answer : b. Hub/switch
Description : Which device uses logical addressing system? a. Hub b. Switch c. Bridge d. Router
Last Answer : d. Router
Description : Which of the following statements accurately describe the differences between a hub and a switch? Check all that apply. A. A switch remembers which devices are connected on each interface, while a hub does not. B. A hub is a ... versions of switches. a. A,B b. A,B,C c. A,B,C,D d. A,C,D
Last Answer : b. A,B,C