Elec Final Flashcards
A triangle which contains only two equal sides
Isosceles triangle
What voltage can be present on the cathode of electron gun
25 KV
Which of the following is not an application of oscilloscope measurement
Measure current amplitude
Which of the following controls will vertically adjust the electron beam
Volts division
What position is the CAL control knob normally placed
Fully clockwise
What are the two basic types of probes used in our oscilloscopes
X one X 10
Moderate increase to an above normal current over a period of time is an explanation of
Overload
What is the maximum voltage and current rating of a plug fuse
150 V 30 A
What is expected interrupting capacity of an HRC fuse
200 kamps
Under what conditions must a HRC fuse be used for circuit protection
Over 10,000 A
What type of breaker is capable of protecting equipment from overload
Thermal
What term is used to describe a breaker that trips even though it handled is held in the opposition
Trip free
What type of breaker protects against overcurrent only
Magnetic
What does a single pole GFCI breaker measure to monitor leakage current
In balance current between hot and neutral connection
What residential circuits are to be protected by our fault current breaker
Bedroom receptacles
Which following factor will have no effect on the magnitude of induced voltage produced by an alternator
Mean pole polarity
What is the term that represents the distance from one point of a way for him to wear it repeats itself
Cycle
How many electrical degrees of induced voltage are produced from for Pool alternator that rotates one mechanical revolution
720
The DC circuit contains a series connected resistor and capacitor as the voltage across the capacitor increases the current flowing through the circuit blank and the voltage across the current limiting resister blank
Decreases decreases
The current that realay coil draws is due to
Coil resistance
The total late opening of the lamp is measured in
Lumens
The unit for illumination is
Lux
And angle which is less than 90° is commonly called a
Acute angle
What device is used to activate the Mercury switch contacts in a common thermostat
By metallic element
