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Block 4 (Final Practice)

Total questions: 36

Worksheet time: 18mins

Name
Class
Date
1.

A capacitance of 9 microfarads is written as:

a)

0.009

b)

0.000009

c)

9 millionths of a farad

2.

In a circuit with inductive reactance, the overall current:

a)

and capacitive effects cancel each other out

b)

is synchronized with the voltage

c)

lags

3.

Before testing resistance in a circuit, you must first:

a)

ensure the circuit is turned on

b)

have the polarity connected correctly

c)

shut off all power to the circuit

4.

The unit used to measure capacitive reactance is:

a)

Henry

b)

Ohm

c)

Farad

5.

A tool that combines functions of a voltmeter, ohmmeter, and ammeter is a:

a)

insulation tester

b)

circuit analyzer

c)

digital multimeter

6.

A circuit that allows current to pass freely is said to have:

a)

Infinite resistance

b)

Continuity

c)

A broken load

7.

A current limiter allows brief overloads and is shown with the same symbol as a:

a)

Light-emitting diode

b)

CL sensor

c)

Fuse

8.

The term for how easily a material can support magnetic lines of flux is:

a)

Saturation

b)

Permeability

c)

Reluctance

9.

In an AC circuit, the type of power that represents energy actually used by resistive components is:

a)

Reactive Power

b)

True Power

c)

Apparent Power

10.

What part of an atom is involved in chemical bonding and reactions?

a)

Neutron

b)

Electron

c)

Positron

11.

Conventional current flow is defined as movement from:

a)

a. a magnetic field direction

b)

b. negative terminal to positive terminal

c)

c. positive terminal to negative terminal

12.

A coil resists changes in the current passing through it. This effect is called:

a)

Magnetic alignment

b)

Inductance

c)

Field saturation

13.

If multiple resistors are connected side-by-side (in parallel), the total resistance will:

a)

get higher

b)

decrease

c)

not change

14.

What condition may develop in Ni-Cad batteries due to frequent overcharging and rare use?

a)

SLA condition

b)

Voltage depression

c)

Cell balancing issue

15.

A coil resists changes in the flow of electric current due to its:

a)

2πfL value

b)

Inductance

c)

Inductive reactance (XL)

16.

Which of the following includes the primary internal parts of a typical DC generator?

a)

Brush assembly, slip rings, rotating armature

b)

Rotating armature, slip rings, field frame

c)

Rotating armature, field frame, brush assembly

17.

In an AC circuit, which type of power represents the actual energy used by the resistive component?

a)

Resistive Power

b)

Apparent Power

c)

True Power

18.

Doping a semiconductor with boron or aluminum will result in which of the following?

a)

Proton inclusion

b)

Hole formation

c)

Free electron production

19.

When selecting a capacitor for a circuit, how should its voltage rating compare to the applied voltage?

a)

Equal to the instantaneous voltage

b)

Equal to the RMS voltage

c)

At least 50% higher than the peak voltage

20.

What tool and method would most accurately determine the charge state of a lead-acid battery?

a)

Measuring electrolyte after full charge

b)

Checking the water-acid ratio

c)

Using a hydrometer to check electrolyte density

21.

What is a commonly used solution for reversing the “memory effect” in standby-use Ni-Cad batteries?

a)

Deep-cycle charging

b)

Switching to Lead-Acid

c)

Replacing with sealed lead-acid (SLA) batteries

22.

What is the proper symbol and unit for apparent power in an electrical circuit?

a)

AP and Watts

b)

Power factor and Volt-Amps

c)

S and Volt-Amps

23.

A point measured at any instant on a sine wave is referred to as the:

a)

RMS value

b)

Effective value

c)

Instantaneous value

24.

The output frequency of an alternator is determined by:

a)

Rotor speed and applied voltage strength

b)

Magnetic field strength and number of poles

c)

Rotor speed and number of poles

25.

What classification best describes a typical lead-acid battery?

a)

Primary battery

b)

Dry cell

c)

Secondary cell

26.

Which motor type is most commonly found in small machinery with fractional horsepower?

a)

Capacitor start motor

b)

DC start motor

c)

Induced pole motor

27.

What is typically the operational limiting factor for most AC motors?

a)

Need for lubrication

b)

Slip ring replacement cycle

c)

Operating temperature

28.

What are the three functional regions of a bipolar transistor?

a)

NPN, PNP, and common junction

b)

Anode, cathode, gate

c)

Collector, emitter, base

29.

In a forward-biased PN junction, what condition is observed?

a)

Excess electrons in the depletion zone

b)

A narrow depletion region

c)

A positive charge on the N-type side

30.

Which set includes the three basic Boolean logic operations?

a)

Yes, No, Maybe

b)

1, 0, +

c)

AND, OR, NOT

31.

In a circuit with inductive reactance, how does the current behave in relation to the applied voltage?

a)

Current is in phase with voltage

b)

Current leads the voltage

c)

Current lags the voltage

32.

What two words make up the term "alternator"?

a)

Aircraft generator

b)

AC and DC generator

c)

Alternating and generator

33.

A dry cell battery is typically classified as a:

a)

Secondary cell

b)

Lead acid

c)

Primary cell

34.

Which two feedback types are used in amplifier circuits?

a)

AC and DC

b)

High and low impedance

c)

Positive and negative

35.

When seating DC generator brushes, which material should not be used?

a)

Soft grit sandpaper

b)

Emery cloth

c)

Generator oil

36.

What three components contribute to the total opposition of current flow in an AC circuit?

a)

Inductance, resistance, capacitance

b)

Resistance, inductive reactance, capacitive reactance

c)

Impedance, voltage, resistance