29 July 2016

ELECTRICAL QUESTIONS FOR ORAL-ETO

ELECTRICAL QUEASTIONS FOR ELECTRO TECHNICAL OFFICER

1.  The full torque electric brake on an electric cargo winch functions to _____________.

2.   When troubleshooting most electronic circuits, "loading  effect" can be minimized by using a voltmeter with a/an 

3.  An electric tachometer receives the engine speed signal from a _______________.

4.  A semiconductor that decreases in resistance with an  increase in temperature is known as a _____________.

5.  The shunt used in an ammeter should be connected in  ____________.

6.  Brushless generators are designed to operate without the use of ___________.

7.  An operating characteristic appearing on the name plates of shipboard AC motors is _____________.

8.  Moisture damage, as a result of condensation occurring  inside of the cargo winch master switches, can be reducedby __________________.

9.  what will happen if thesolenoid coil burns out on a cargo winch with an electrical brake?

10.  External shunts are sometimes used with ammeters to_______.

11.  Where a thermal-acting breaker is required to be used in an area of unusually high, low, or constantly fluctuating  temperatures, an ambient compensating element must be used. This element consists of a ______________.

12.  The electrolyte used in a nickel-cadmium battery is  distilled water and ______________.

13.  An accidental path of low resistance, allowing passage of abnormal amount of current is known as a/an ____________.

14.  When reading electrical motor controller diagrams, it helps to know that ____________.






ANSWERS

1.      Automatically hold the load as soon as current to the  machine is shut off

2.     Input impedance much greater than the impedance across  which the voltage is          being measured

3.     Small generator mounted on the engine

4.     Thermistor

5.     Series with the load and in parallel with the meter movement

6.     Brushes, slip rings, commutator

7.     Temperature rise

8.     Using strip heaters inside the switch box

9.     The brake will be set by spring force.

10.   Prevent damage to the meter movement from heat generated by the shunt

11.   Second bimetal element

12.   Potassium hydroxide

13.   Short circuit

14.   Current paths in the power circuit are drawn as heavy lines and in control circuit as      lighter lines  





"I have not failed. I've just found 10,000 ways that won't work." --Thomas A. Edison

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ELECTRICAL QUESTIONS FOR ORAL-ETO
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