Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Marine Electrical Systems (Set 16)
30:00
|Question 1 of 30
Question Navigator
Correct Incorrect Pending Starred
Question 1 of 30
To limit the current flow through a DC voltmeter to as low a value as possible, what is the moving coil circuit provided with?
Browse Questions in Set 16
30 MCQs #1 To limit the current flow through a DC voltmeter to as low a value as possible, what is the moving coil circuit provided with? #2 An internal resistance is placed in series with the meter movement of which of the following instruments? #3 Which of the listed meters uses a shunt connected in series with the load, but parallel with the meter movement? #4 Why are external shunts sometimes used with ammeters? #5 When a resistor is used as a shunt and is connected in parallel with a meter movement coil, what capability does this provide? #6 What is the instrument called a galvanometer used to measure? #7 What is an ammeter used to measure? #8 The clamp-on AC ammeter consists essentially of a split-core and a rectifier-type instrument connected to the secondary winding of a particular type of transformer. Which type is used? #9 In order to take a current reading with a 'clamp-on' ammeter, what should be the status of the jaws of the instrument? #10 A digital multimeter, set up as a milliammeter on the 100 milliamp scale, is known to have an accuracy of plus or minus 2%. A meter reading of 5.0 milliamps would indicate an actual line current between what two values? #11 A digital multimeter is set up as an ohmmeter on the 1 kohm scale. What does a display reading of 'OL' ohms as read across the ends of a wire conductor indicate? #12 What practice could potentially damage a multimeter? #13 Whether analog or digital, what are most AC voltmeters calibrated to measure? #14 Which of the listed statements is correct when using an digital multimeter set up as an ohmmeter? #15 Which of the following conditions indicates a short circuited capacitor when checking its condition with a digital multimeter set up as an ohmmeter? #16 Before measuring an unknown resistance with an analog multimeter set up as an ohmmeter, what should you do? #17 As shown in figure "A" of the illustrated digital multimeter screen, what would be the significance of the symbol indicated by "2" being illuminated? Illustration EL-0047 #18 What is an ohmmeter used to measure? #19 As shown in figures "B" and "C" of the illustration, what should be the switch position and which test lead terminal jacks should be used if your intent is to measure DC currents anticipated as high as 200 milliamps? Illustration EL-0047 #20 Circuit resistance is usually measured off-line (de-energized) with an ohmmeter. In the absence of an ohmmeter, however, resistance may be INDIRECTLY measured on-line (energized) using what meter (or meters)? #21 If the pointer fails to return to zero when a hand-cranked megger is disconnected, what does this indicate? #22 Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative? #23 As shown in the illustrated devices and symbols, which of the devices represents an open general purpose relay? Illustration EL-0005 #24 Which of the following illustrated manual motor starters represents the wiring diagram illustrated in figure "A"? Illustration EL-0023 #25 What is the name of the type of motor control circuit that will not permit automatic restarting after power is restored, following a power failure? #26 Which of the following statements represents the main difference between a relay and a contactor? #27 Which of the motors for the devices listed below is fitted with an instantaneous overload relay? #28 An across-the-line starter is typically used for which of the following applications? #29 What is the functional name of an electrical device which prevents simultaneous energization of loads thereby preventing damage or injury. #30 What functionality does a low-voltage protection circuit as used in electric motor starting equipment provide?
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...