Mastering Technical Terminology: Fasteners, Electricity, and Dimensional Accuracy

Posted on Feb 9, 2025 in Electromechanical Engineering

Technical Terminology: Fasteners, Electricity, and Dimensions

Prepositions and Common Phrases

Dependent Prepositions: zatia prep+noun

• In theory
• In practice
• In advance
• On purpose
• By heart
• At the latest
• By chance
• On the news (dia konkreto)
• In the news these days
• In a very bad mood
• In the end (at last, finally)
• By mistake
• For nothing
• On good terms
• On principle
• In principle
• In debt
• Against the law
• As a rule

Dimensional Accuracy

(Precision and tolerance, size, shaft, bolt)

• Allowed/Permissible: Acceptable
• Exact/Accurate/Precise: Correct
• Differ/Vary/Deviate: Change
• Exactness/Precision/Accuracy: Correctness
• Not Exact: Inaccurate
• Deviation between maximum and minimum: Variation range
• An acceptable deviation: Within tolerance
• An unacceptable deviation: Outside tolerance
• Little deviation allowed: Tight tolerance
• Large deviation allowed: Loose tolerance

Lotu bi zutabeak:

• It’ll bind – the bolt won’t be able to turn.
• It’ll contract – the shaft will shorten.
• It’ll expand – the hole will widen.
• There’ll be too much… the bolt won’t fit.
• It needs a clearance… the wheel will…
• It needs an interference… the bolt will have to turn…

Testua eta hutsuneak:

1. Variation
2. Precise
3. Tolerances
4. Plus
5. Minus
6. Within
7. Permissible range fit clearances

Numbers and Calculations

(Decimals and fractions, multiplication, division…)

Complete the description:

• 0.25 = 1/4 (fraction)
• 0.6368 ≈ 0.64 (rounded up to two decimal places)
• 7.5278 ≈ 7.528 (rounded up to three decimal places)
• 7.5278 ≈ 7.5 (rounded down to one decimal place)
• 8,26,154 (whole numbers)

• 14 + 8 = Plus
• 100 x 20 = Times
• 7 x 11 = Multiplied
• 400 : 8 = Divided
• 95 + 2 = Sum
• 8² = Square
• √48 ≈ 6.93 (Square root)
• 48 – 12 = Minus

Current, Voltage, and Resistance

Word puzzle:

1. Current (ampere)
2. Supply (provided by a battery)
3. Power (measured as wattage)
4. Conductor (allows current to flow)
5. Insulator (has very high resistance)
6. Charge (carried by moving electrons)
7. Appliance (another term for device)
8. Shock (the consequence of electrical contact)

Hutsuneak bete hitzekin in electrical calculations… in other words, the…

1. Current
2. Circuit
3. Amps
4. Voltage
5. Supply
6. Volts
7. Resistance
8. Ohms
9. Components
10. Conductor
11. Watts
12. Wattage

Mechanical Fasteners: Bolts, Preload, and Washers

Aldatu esaldia zuzena izan dadin.

• Bolts are well… (suited for clamping forces).
• Nuts are screwed onto bolts by turning them clockwise.
• The threaded part of a bolt is the shaft.
• Threads are cut to form a helix.
• Spanners are designed to… (tighten or loosen fasteners).

In structural applications, it is essential to:

1. Tighten
2. Preload
3. Work loose (if excessive force is used)
4. Over-tighten
5. Torque
6. Tension
7. Shear force
8. Loosen

True or false:

• The purpose of all washers is to distribute load. (False)
• Plain washers are flat. (True)
• Spring washers change shape. (True)
• Spring washers ensure that, no matter… (False)
• In situations where components are… (False)

Mechanical Fasteners 2

Make word combinations with…

1. A machine screw is a thin fastener.
2. A self-tapping screw does not require a pre-tapped hole.
3. A flat head screw has a straight top.
4. A crosshead screw fits a Phillips screwdriver.
5. A set screw applies pressure.

Wall Plugs: How Not to Use Them

Complete the article:

You check the diameter of the hole required…

1. Plug (enchufe)
2. Screw
3. Screwdriver
4. Expand
5. Crosshead
6. Head
7. Pullout (extraer)
8. Set in

Rivets

Match the descriptions:

• A type of fastener that is hollow – Blind rivet
• A type of fastener that is not hollow – Solid rivet
• A tool used for installing rivets – A rivet gun
• The wide part at the top of a rivet – Factory head
• The wide part at the bottom of a rivet – Shop head