WorksheetsBlock 4 (Final Practice)
Total questions: 36
Worksheet time: 18mins
A capacitance of 9 microfarads is written as:
0.009
0.000009
9 millionths of a farad
In a circuit with inductive reactance, the overall current:
and capacitive effects cancel each other out
is synchronized with the voltage
lags
Before testing resistance in a circuit, you must first:
ensure the circuit is turned on
have the polarity connected correctly
shut off all power to the circuit
The unit used to measure capacitive reactance is:
Henry
Ohm
Farad
A tool that combines functions of a voltmeter, ohmmeter, and ammeter is a:
insulation tester
circuit analyzer
digital multimeter
A circuit that allows current to pass freely is said to have:
Infinite resistance
Continuity
A broken load
A current limiter allows brief overloads and is shown with the same symbol as a:
Light-emitting diode
CL sensor
Fuse
The term for how easily a material can support magnetic lines of flux is:
Saturation
Permeability
Reluctance
In an AC circuit, the type of power that represents energy actually used by resistive components is:
Reactive Power
True Power
Apparent Power
What part of an atom is involved in chemical bonding and reactions?
Neutron
Electron
Positron
Conventional current flow is defined as movement from:
a. a magnetic field direction
b. negative terminal to positive terminal
c. positive terminal to negative terminal
A coil resists changes in the current passing through it. This effect is called:
Magnetic alignment
Inductance
Field saturation
If multiple resistors are connected side-by-side (in parallel), the total resistance will:
get higher
decrease
not change
What condition may develop in Ni-Cad batteries due to frequent overcharging and rare use?
SLA condition
Voltage depression
Cell balancing issue
A coil resists changes in the flow of electric current due to its:
2πfL value
Inductance
Inductive reactance (XL)
Which of the following includes the primary internal parts of a typical DC generator?
Brush assembly, slip rings, rotating armature
Rotating armature, slip rings, field frame
Rotating armature, field frame, brush assembly
In an AC circuit, which type of power represents the actual energy used by the resistive component?
Resistive Power
Apparent Power
True Power
Doping a semiconductor with boron or aluminum will result in which of the following?
Proton inclusion
Hole formation
Free electron production
When selecting a capacitor for a circuit, how should its voltage rating compare to the applied voltage?
Equal to the instantaneous voltage
Equal to the RMS voltage
At least 50% higher than the peak voltage
What tool and method would most accurately determine the charge state of a lead-acid battery?
Measuring electrolyte after full charge
Checking the water-acid ratio
Using a hydrometer to check electrolyte density
What is a commonly used solution for reversing the “memory effect” in standby-use Ni-Cad batteries?
Deep-cycle charging
Switching to Lead-Acid
Replacing with sealed lead-acid (SLA) batteries
What is the proper symbol and unit for apparent power in an electrical circuit?
AP and Watts
Power factor and Volt-Amps
S and Volt-Amps
A point measured at any instant on a sine wave is referred to as the:
RMS value
Effective value
Instantaneous value
The output frequency of an alternator is determined by:
Rotor speed and applied voltage strength
Magnetic field strength and number of poles
Rotor speed and number of poles
What classification best describes a typical lead-acid battery?
Primary battery
Dry cell
Secondary cell
Which motor type is most commonly found in small machinery with fractional horsepower?
Capacitor start motor
DC start motor
Induced pole motor
What is typically the operational limiting factor for most AC motors?
Need for lubrication
Slip ring replacement cycle
Operating temperature
What are the three functional regions of a bipolar transistor?
NPN, PNP, and common junction
Anode, cathode, gate
Collector, emitter, base
In a forward-biased PN junction, what condition is observed?
Excess electrons in the depletion zone
A narrow depletion region
A positive charge on the N-type side
Which set includes the three basic Boolean logic operations?
Yes, No, Maybe
1, 0, +
AND, OR, NOT
In a circuit with inductive reactance, how does the current behave in relation to the applied voltage?
Current is in phase with voltage
Current leads the voltage
Current lags the voltage
What two words make up the term "alternator"?
Aircraft generator
AC and DC generator
Alternating and generator
A dry cell battery is typically classified as a:
Secondary cell
Lead acid
Primary cell
Which two feedback types are used in amplifier circuits?
AC and DC
High and low impedance
Positive and negative
When seating DC generator brushes, which material should not be used?
Soft grit sandpaper
Emery cloth
Generator oil
What three components contribute to the total opposition of current flow in an AC circuit?
Inductance, resistance, capacitance
Resistance, inductive reactance, capacitive reactance
Impedance, voltage, resistance
