Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Marine Electrical Systems (Set 8)
30:00
|Question 1 of 30
Question Navigator
Correct Incorrect Pending Starred
Question 1 of 30
Why should a breakable, mercury-filled thermometer NOT be used in a lead-acid battery to measure electrolyte temperature?
Browse Questions in Set 8
30 MCQs #1 Why should a breakable, mercury-filled thermometer NOT be used in a lead-acid battery to measure electrolyte temperature? #2 Under normal conditions, storage batteries used for starting the emergency diesel generator are maintained in a charged state by which of the following methods? #3 Which of the following statements concerning the specific gravity of a battery electrolyte is true? #4 Why should battery rooms be well ventilated during the charging process? #5 When a battery is continuously exposed to low temperatures, what is the best procedure to keep it from freezing? #6 When a hydrometer indicates specific gravity what is being compared? #7 What practice would be considered proper storage battery maintenance? #8 When charging, which of the following represents the recommended maximum allowable temperature for electrolyte in a lead-acid battery? #9 When charging lead-acid batteries, why should you reduce the charging rate as the battery nears its full charge capacity? #10 What will the charging of lead-acid storage batteries always result in? #11 What is the proper way to mix the electrolyte for a lead-acid battery? #12 When charging a 100 amp-hour lead-acid battery, what statement is true? #13 What should be done when correcting specific gravity readings of a lead-acid battery for existing temperature conditions? #14 What is the most reliable indication of the state of charge of a lead-acid battery? #15 What statement is true concerning the specific gravity of the electrolyte solution in a lead acid battery? #16 Which of the following statements concerning nickel-cadmium batteries is true? #17 When a nickel-cadmium battery begins gassing while connected to the battery charging circuit, what should be done? #18 What would you use to determine the state of charge of a nickel-cadmium battery? #19 Which statement is true concerning the charging a wet cell nickel-cadmium battery? #20 What could cause a very slow, but continual loss of electrolyte level from the cells of a storage battery? #21 What would cause a lead-acid battery to become hotter than normal during charging? #22 When troubleshooting a lead-acid storage battery, what is the best method for detecting a weak or dead cell? #23 In terms of the battery electrolyte, when performing maintenance of alkaline batteries what should be done? #24 When troubleshooting an alkaline storage battery, what is the best way to locate a weak or dead cell? #25 Which of the following losses is minimized by laminating the core of a DC generator armature? #26 What is the correct name for a variable resistor wired in series with the shunt field for the purposes of manually controlling generator output voltage? #27 As a DC armature revolves within a stationary magnetic field, the reversals of magnetization of the armature core lags the current reversals which produces heat. What is the correct name for this action which is minimized by the use of soft silicon steel? #28 In a shunt-wound DC generator, with what generator component are the shunt field windings connected in parallel with? #29 A variable shunt, connected across the series field coils of a DC compound wound generator, permits adjustment of the degree of compounding. What is this variable shunt called? #30 Which of the following components are used to convert alternating current produced in the DC generator armature windings to direct current?
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...