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WorksheetsElectrical Engineering Multiple Choice Questions (2023 Updated)
Total questions: 100
Worksheet time: 55mins
Capacitors are sometimes used in dc circuits to
Counteract inductive reactance at specific locations
Smooth out slight pulsations in current/voltage
Assist in stepping voltage and current up and/or down
(refer to figure 11) What would happen to the total current flow if resistance is doubled?
It would be reduced by 25%
It would increase by 1mA
It would be reduced by 50%
Bonding connections should not exceed
1 ohm
0.1 ohm
0.003 ohm
What two devices present a change in direction of current flow in a circuit under fault conditions?
Differential current protector and fault feeder
Over excitation and under excitation circuit
Cut-out relay and reverse current circuit breaker
Which of the following logic gates will provide an active high out with all active high inputs
NOR
AND
OR
Which of the following logic gates will provide a low output when any of the inputs is high?
NOR
NAND
AND
What is the no load voltage on a 6 cell battery capable of supplying 5 amperes?
6 volts
12 volts
10 Volts
When reading a blueprint, a dimension is given as 4.387 inches +0.003 -0.002. Which statement is true?
The maximum acceptance is 4.390 inches
The minimum acceptance size is 4.384 inches
The minimum acceptable size is 4.389 inches
Which of the following is an example of a second class (class B) lever?
Retractable landing gear
wheelbarrow
See-saw
When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?
Gear downlocks installed
Parking breaks set
Parking breaks not set
What precaution should be taken when removing a flexible hose from an aircraft?
Hoses will become brittle over time if not flexed occasionally
Hoses should not be straightened and should rely on a wire to support their shape
The hose interior should be coated with the liquid it carries to prevent embrittlement
What type of hose should be used in areas of high vibration?
Ridgid
Flexible
Both
What does the dash number on a hose signify?
Pressure capacity
Flow capacity
Inside diameter
When a teflon hose has been in service for a time, what condition may have occurred and/or what precaution should be taken when it is temporarily removed from the aircraft?
The hose interior must be kept wet with the fluid carried to prevent embrittlement/deterioration
The hose may become stiff and brittle if not flexed or moved regularly
The best tool for use when cutting aluminum tubing, or any tubing is of moderately soft metal is:
Hand operated wheel-type tubing cutter
Fine-tooth hack saw
Circular-saw equipped with an abrasive cutting wheel
Which of the following statements is/are correct in reference to flare fittings?
1
1 and 3
1, 2, and 3
Which statement is true regarding flattening of tubing in bends?
Flattening by a maximum of 20 percent of the original diameter is permissible
Flattening by not more than 25 percent of the original diameter is permissible
The small diameter portion in the bend cannot exceed more than 75 percent of the diameter of straight tubing
A 3/8 inch aircraft high pressure flexible hose as compared to 3/8 inch metal tubing used in the same system will
Have equivalent flow characteristics
Usually have interchangeable applications
Have higher flow characteristics
What are the visual indications when identifying stress factors with a magnetic particle testing?
A wide and mounded buildup of particles
Very fine, sharp lines, with not buildup as a result of flaw depth
Jagged lines with irregularity and no localized buildup
What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?
Titanium alloy
Chrome molybdenum alloy steel
Stainless steel
What materials do you normalize?
Non-ferrous
Ferrous
Both A and B
What would leftover weld be called?
Toe
Throat
Leg
(Refer to figure 45) What type weld is shown at E?
Lap
Fillet/T
Joint
What numerical weight does the number 5 represent in 64,592?
100
500
0.500
(Refer to figure 50) Identify the signal to start the engine on a rotocraft
3
2
1
In the fully articulated rotor system, the blades are attached to the hub with multiple hinges. How are the blades hinged?
The blades are hinged for movement up and down (flapping), but not for fore and aft movement
They are hinged in a way that allows them to move up and down, and fore and aft
The blades are attached to the links allowing the blades to teeter like a see-saw
A fuel that does not vaporize readily enough can cause
Detonation
Hard starting
Vapor lock
What is another name for “False Brinelling”
Intergranular Corrosion
Exfoliation Corrosion
Fretting Corrosion
Which of the following is an acceptable first step procedure to help prevent scratching when cleaning a transparent plastic surface?
A. Gently wipe the surface with a clean, dry, soft cloth.
B. Flush the surface with clean water
C. Gently wipe the surface with a clean, soft cloth moistened with de-mineralized or distilled water
Why is a plastic surface flushed with fresh water before it's cleaned with soap and water?
To prevent crazing
To prevent scratching
To prevent discoloration
Galvanic corrosion at the interface of a dissimilar metal part may best be prevented by
Placing a nonporous dielectric material between the surfaces
Conducting frequent inspections and keeping all exposed areas of the part clean
Sealing exposed seam edges with a recommended sealing compound
Of the following when and/or where is galvanic corrosion most likely to occur?
When an electrolyte (water) covers the surface of an aluminum skin, seeps into the cracks between lap joints, and oxygen is excluded from the area
At the interface of a steel fastener and aluminum alloy inspection plate in the presence of an electrolyte.
In an area of unprotected metal exposed to an atmosphere containing battery fumes, exhaust gasses, or industrial contaminants
Solve the equation: (SQ100 + SQ36 - SQ16) = (where SQ is “square root”)
12
10
8
6
Which of the following is correct?
12
60
76
7056.0452 x 1/72 is most nearly equal to the square root of which of the following?
9,406
9,604
9,801
Which alternative answer in figure 68 is equal to 463,100?
1
2
3
Which of the following is equal to the square root of 3844
A. 31(2) + 7 + (-3.5 x 2)=
B. 480(4) + (-4) - (-3 x 2)=
C. 940 x 4 - (-2) + 2=
Solve the equation 1/16 + (32 x 3/8)=
1.992
0.01945
0.0138
Select the fractional equivalent of 0.078125
3/32
1/16
5/64
1.296875 is equal to
A. 83/64
B. 19/16
C. 39/32
If an airplane has two 28-gallon fuel tanks, how many quarts would it contain if they are full?
114
224
22.4
The speed of sound at sea level is 760 mph. If an aircraft is flying at Mach 1.3 at sea level, what is the speed in mph?
912 mph
988 mph
838 mph
Solve the equation. 4 - (-2) ÷ 12 ÷ 2 × 3
24
36
21
After an Annual inspection is performed, any defect found must be listed and provided to the owner and kept for how long?
Until the defects are corrected
For two years from the date of the annual inspection
Until the aircraft is sold and ownership is transferred
If you do an annual on the 15th of the month, when would the next one be due
The 11th month on the first day
The last day of the 12th month
The first day of the 13th month
What is ISpec 2200
Standards for maintaining commercial aircraft records
Information standards for aviation maintenance.
Sales standards for aircraft with a max gross weight over 12,500 pounds
Under what circumstances may the FAA refuse to issue a special flight permit under the provisions of Title 14 CFR part 21.197?
For evacuating aircraft from areas of impending danger.
For flight to a maintenance facility where experiencing service difficulties
For conducting customer demonstration flights in a new production aircraft that have not satisfactorily completed production flight tests
Major repairs and major alterations to a light sport aircraft requires
An entry into the maintenance records and a FAA form 337 in duplicate
A maintenance release form
An 8130-3 to be sent to the FSDO and the manufacturer
Why can the boiling point of a given liquid vary
The boiling point of a liquid is directly proportional to the pressure acting on it
The applied temperature will have different effects based on the liquid volume
The boiling point of a liquid is considered to be constant
What is the standard measure of heat energy
Caloric BTU
Fahrenheit BTU
Kelvin BTU
Why would wings or flaps have manufactured holes in their surface?
Reduced weight
Increased strength
Increased fuel economy
When an aircraft is flown for which an applicable Airworthiness Directive has not yet been complied with is
A. A violation of 14 CFR 38.7 for each flight
B. A violation of 14 CFR 21.199 for each flight
C. Is acceptable if the aircraft is determined to be safe by the owner/operator
When doing a beach check on a fuel tank and you only have access to one side, what non-destructive testing method do you use?
Airworthiness Directives are issued by the
FAA
Aircraft manufacturers
National Transportation Safety Board (NTSB)
Where are current ADs located?
NTSB
14 CFR 39
The Thomas Turner library in Washington DC
Which of the following statements is correct?
1 and 2 are true
Only 1 is true
Only 2 is true
The following words are an example of what kind of statement “Model 172 airplanes (serial numbers 36216 through 36769) that have not been modified with Cessna Service Kit SK-172-10 OR SK-172-10A, certificated in any category.
Amendment
Compliance
Applicability
What is the definition of “Preventative Maintenance”?
Annuals and 100 hour inspections
Maintenance that does not complex assembly operations
Maintenance on any aircraft operated under Part 91
Two types of stress placed on a mechanic are:
Tension and compression
Friction and inertia
Heat and cold
Electric and magnetic
What are the two types of stress that can affect a person?
Physical and psychological
Physical and organizational
Physical and fatigue
Under Title 14 of the Code of Federal Regulations, what is the maximum penalty for falsification, alterations, or fraudulent reproduction of certificates, logbooks, reports, and records?
Ineligibility to receive and certificate or rating for one year
Imprisonment for one year and a 5,000.00 fine
Suspension or revocation of any certificate held
How long does the holder of a certificate issued under 14 CFR Part 65 have to notify the FAA after and change in permanent mailing address
30 days
60 days
90 days
What is effect on the issuance of your Arman certificate when the TSA issues a final notification of threat assessment
The FAA will hold the certificate in abeyance
The FAA will request additional information regarding your certificate application
The FAA will deny any approval for a certificate, rating, or application
What is the normal duration a mechanic certificate with airframe and/or powerplant ratings
Until the holder is relieved of duties for which the holders was employed and certificated
Until surrendered, suspended, or revoked
Until 24 months after the holder has last exercised the privileges of the certificate
Why is a mechanic applicant issued a temporary certificate after successful completion of the required tests?
To allow for review of his/her application and supplementary documents
So that the background investigation may be completed
Both of the other two choices.
The maximum duration of a temporary airman certificate is:
30 days
60 days
90 days
120 days
How many days are specified in the following options?
60 days
90 days
120 days
When may an otherwise qualified mechanic who does not read, write, speak, or understand English language be eligible to apply for a mechanic certificate?
When a special authorization has been granted by the Administrator
When employed outside the United States by a U.S. air carrier
When employed outside the United States.
Which of the following statements is true for a certificated and appropriately rated mechanic regarding repairs and alterations.
He/she may perform an airframe major repair or major alteration, but cannot approve the work for the return to service.
He/she may perform airframe minor repairs and minor alterations and approve the work for return to service, but cannot perform an airframe major repair or major alteration
He/she may perform an airframe major repair or major alteration and approve the work, but not the entire aircraft, for return to service.
Primary responsibility for compliance with Airworthy Directive lies with the
Certified mechanic who maintains the aircraft
Certified mechanic holding an Inspection Authorization who conducts appropriate inspections
Aircraft owner or operator
Who developed the Dirty Dozen
Gordon DuPont
Professor E. E.
Dr. James Reason
The “crack down” approach for human behavior control is based upon:
Fear and Punishment
Knowledge and ability
Awareness and Resources
Lack of clean direct statements are good, active listening skills, is the lack of what?
Communication
Awareness
Teamwork
All of the following are consequences of human error, except:
Mental Stressor
Catastrophic
Personal Injury
When an incident or accident occurs as a result of a decision made long before the failure, what type of failure is it?
Latent
Active
Situational
Human factors Dirty Dozen list includes all but
Latent Failure
Lack of Awareness
Norms
The maintenance error decision aid (MEDA) concept is based on which principle
Manageability of Errors
Synchronous Communication
Leadership Values
What is the most common maintenance error?
Installation
Setup
Troubleshooting
The failure to be alert or vigilant in observing is
Lack of Awareness
Distraction
Fatigue
Human factors is the study of how people interact with their
Environment
Organization
Cultures
What is the study of human dimensions?
Physiology
Organization
Anthropometry
What is anthropometry?
Physiology
Ontology
Anthropometry
Three types of human errors are:
A. Omission, Commission, Extraneous
B. Active, Latent, Stressor
C. Mental, Situational, Physiological
What type of accident doesn’t happen immediately?
Active
Latent
Stressor
What did Dr. James Reason do?
Created Dirty Dozen
Theorizes human errors
Studied Human effects
Compare pilot error vs. mechanical error and which is usually the most common
Pilot error
Mechanical error
Management error
Professor James Reason explains that errors by aircraft mechanics fall into one of three categories.
Slips, mistakes, and violations
Failures, fatigue, and distractions
Technique, fatigue, and distractions
The Following will lead to improved quality, and an environment that ensures continued worker and aircraft safety
1. Auditing, using an independent organization.
2. Human factors awareness.
3. An internal reporting and auditing system
Of the following statements, which one is incorrect?
A. SLSA are factory built
B. SLSA and ELSA are kit built
C. ELSA are kit built
Which standard practice action is performed when soldering AC wiring
Use the maximum solder to ensure a good bond.
Wet the wire with flux after soldering
Heat the wire until wetting action begins
What type of solder is commonly used in electronics
50% lead and 50% tin
40% lead and 60% tin
60% lead, and 40% tin
Which thermal device can be reset after a current overload?
Trip free circuit breaker
Fuse
Current limiter
To avoid compliance with an airworthiness directive:
Find a similar aircraft model and use it in your logbook
Request exemptions through a letter to the Flight Standards District Office
Submit alternate plans to the Faa in Oklahoma City, Oklahoma
John is a mechanic 6’ 2” tall and Mary is 5’3” tall, both are equally qualified. There is a requirement to repair a bulkhead inside the aft compartment of a fuselage. What element comes into play in this scenario?
What does the maintenance resource management approach concern?
Effective communication and safety of training.
Maintaining complete control of employee accountability
Ability to control a group of employees
What is the conceptual principal of MRM
Ability
Skillset
Training
What is the main difference between a team of people and a group of people
Size
Interdependence
Skillset
How much force is required to lift a 120 pound weight with a single fixed pulley, off of a table that is 3 feet above the floor?
120 foot pounds
360 foot pounds
48.2 foot pounds
Each person performing an annual or 100 inspection shall use a checklist that contains at least those items in
14 CFR part 43 Appendix D
14 CFR part 43 Appendix A
AC 43.13
What is defined as a digital code in which each of the decimal digits (0-9) is represented by a group of four bits?
Binary number system
Binary coded decimal
Gray Code
