Construction Materials and Techniques Quiz

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Questions and Answers

What is the primary function of a piston in an internal combustion engine?

To compress and transfer combustion gases (correct)

To produce electrical energy

To regulate engine temperature

To supply fuel to the engine

Which of the following best describes a spark ignition engine?

An engine that uses a diesel fuel mixture

An engine that relies on compression for ignition

An engine that uses an external ignition source

An engine that ignites fuel with a spark plug (correct)

Which part of an engine connects the piston to the crankshaft?

Connection rod (correct)

Flywheel

Camshaft

Crankcase

What is NOT a function of a crankshaft?

Power the cooling system of the engine Signup and view all the answers

Which component is responsible for sealing the combustion chamber in an internal combustion engine?

Piston rings Signup and view all the answers

What role does the Occupational Health and Safety Act, 1993, emphasize for employers?

Maintain equipment and ensure a safe work environment Signup and view all the answers

Which of the following statements about smoking in the workshop is true?

Smoking in designated areas is permitted Signup and view all the answers

Which statement correctly describes a function of a piston?

To convert chemical energy to mechanical energy Signup and view all the answers

Which mixture is formed by combining stone, sand, cement, and water that hardens over time?

Aggregate Signup and view all the answers

What type of bricks do not require plastering?

Face bricks Signup and view all the answers

Which method is used to set out the foundation digging?

1:2:3 Signup and view all the answers

What are the dimensions in millimeters for a standard concrete footing?

200 × 150 Signup and view all the answers

What equipment must be used to finish off mortar joints to prevent water seepage?

Jointer Signup and view all the answers

What is the total power consumption of the electrical motor in kW?

3.45 kW Signup and view all the answers

Which of the following statements regarding external plastering is true?

It prevents water penetration. Signup and view all the answers

What is the total operational cost of the pump per month?

R1,050 Signup and view all the answers

Where are door frames placed during construction?

When the third brick course is laid Signup and view all the answers

How many metres on the ground will 200 mm on the drawing represent at a scale of 1:100?

0.2 m Signup and view all the answers

What tool is used to scoop up and spread mortar over the brick course?

Brick trowel Signup and view all the answers

How many millimetres on the drawing will 15 meters represent on the ground at a scale of 1:100?

1500 mm Signup and view all the answers

Which term describes the mechanism that wind provides through cross flow and pressure differential?

Ventilation Signup and view all the answers

What does a site plan show in relation to other objects?

Layout of buildings Signup and view all the answers

What commonly causes cracks in the walls of a homestead over time?

Swelling of soil Signup and view all the answers

Which of the following factors affects the resistance against current flow in a conductor?

Length of the conductor Signup and view all the answers

Which tool is designed specifically for loosening and tightening bolts and nuts?

Swivel socket Signup and view all the answers

What tool is used to cut internal threads in holes?

Tap Signup and view all the answers

Which tool is used for measuring outside diameters?

Micrometre Signup and view all the answers

Which tool is used for supporting the weight of a vehicle?

Trolley jack Signup and view all the answers

What tool would you use to measure specific gravity of electrolytes in batteries?

Hydrometer Signup and view all the answers

Which tool can be used to install and remove bushings or bearings?

Press Signup and view all the answers

Which tool is primarily used for measuring electrical problems such as volts, amps, or resistance?

Multimeter Signup and view all the answers

Which tool is specifically designed to clean or cut outside threads on a shaft?

Stock die Signup and view all the answers

What is a recommended safety measure to prevent the spread of fire when there is an open flame?

Place a fixed fire guard around the fire Signup and view all the answers

Which statement is true regarding agriculture waste?

Agriculture waste refers to waste generated from farming activities Signup and view all the answers

How should unwanted chemicals and unused pesticides be disposed of?

At designated dumping sites Signup and view all the answers

Is it safe to store pesticide mixtures overnight before application?

Yes, as long as it is stored in a sealed container Signup and view all the answers

What precaution should be taken before using portable electrical equipment?

Check power cords and extension cords Signup and view all the answers

When can emergency exits be blocked with stored materials?

Only until the next inspection date Signup and view all the answers

What is one reason for wearing a welding helmet while welding?

To protect the head from sparks Signup and view all the answers

Which component is NOT part of the SMAW process?

Cold metal buffer Signup and view all the answers

Study Notes

Tools and Equipment

Swivel socket: Loosens and tightens bolts and nuts.
Monkey wrench: Used for loosening and tightening pipes.
Tap: Cuts internal threads in holes.
Micrometre: Measures outside diameters.
Engineering pliers: Hold objects, cut wire, or crimp.
Stock die: Cuts or cleans outside threads on a shaft.
Trolley jack: Supports a vehicle's weight for undercar work.
Hydrometer: Measures specific gravity of electrolytes in batteries.
Press: Installs and removes bushings or bearings.
Multimeter: Measures electrical problems like volts, amps, or resistance.

Sound Test for Grinding Stone

Inspect grinding stone by tapping it lightly with a non-metallic object.
Listen for any dull thuds indicating cracks.
Perform visual inspection to identify visible fissures.
Rotate the stone while testing to cover all surfaces.
Ensure stone is free from dirt or debris before testing.

Mechanical Terms

Internal combustion engine: Converts fuel into mechanical energy through combustion within the engine.
Spark ignition engine: Uses a spark plug to ignite air-fuel mixture for engine cycle.

Functions of a Piston

Converts pressure from combustion into mechanical work.
Provides a seal within the cylinder to maintain compression.
Transfers energy to the connecting rod.
Enables oil circulation for lubrication.

Crankshaft Functions

Converts linear motion of pistons into rotational motion.
Drives timing mechanisms for engine operation.
Balances engine vibration and maintains engine stability.
Transfers energy to other components in the drivetrain.

Welding Safety

Use welding helmet to protect eyes from UV radiation and sparks.
Shields face from extreme heat generated during welding.
Prevents inhalation of harmful fumes produced during the process.
Reduces the risk of skin burns from molten metal.

Electrical Power Calculation

Power consumption calculated from current (15 A) and voltage (230 V) gives total power in kW.
Daily and monthly operational costs determined based on usage and unit cost (R3.50).

Drawing Scale

A scale of 1:100 means 200 mm on the drawing equals 20 m in reality.
To find mm on drawing for 15 m on the ground, use inverse scale calculation.

Occupational Health and Safety

Employers must maintain safe work equipment and environments.
Workers have the right to inquire about health hazards.
Strict rules against smoking and ensuring clear emergency exits.
Management of agriculture waste is essential but not all is recyclable.

True or False Statements

Understand and evaluate the validity of various safety and procedure-related statements.
Recognize the need for proper equipment maintenance and worker protection measures.

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Description

Test your knowledge on essential construction materials and techniques. This quiz covers topics like aggregates, types of bricks, foundation methods, and mortar joints. It's perfect for students and professionals in the construction field.