{
  "assessmentTests": {
    "mechanical_reasoning": {
      "subscales": {
        "levers_balance": {
          "name": "Levers & Balance"
        },
        "gears_rotation": {
          "name": "Gears & Rotation"
        },
        "pulleys_springs": {
          "name": "Pulleys & Springs"
        },
        "fluids_pressure": {
          "name": "Fluids & Pressure"
        }
      },
      "name": "Mechanical Reasoning Test",
      "desc": "Levers and balance, gears, pulleys and springs, and pressure in fluids and gases, the core ideas of mechanical reasoning, set out as text-described problems.",
      "recommendation": "Build your mechanical reasoning",
      "questions": [
        {
          "question": "You need to loosen a tight nut with a long-handled spanner. Where should you grip the handle to need the least force?",
          "options": [
            {
              "icon": "⚖️",
              "label": "Close to the nut, where the push acts most directly"
            },
            {
              "icon": "⚖️",
              "label": "At the far end of the handle, away from the nut"
            },
            {
              "icon": "⚖️",
              "label": "Halfway along the handle, where it is strongest"
            },
            {
              "icon": "⚖️",
              "label": "Anywhere along it, as the force needed is the same"
            }
          ]
        },
        {
          "question": "A gear with 20 teeth turns clockwise at 60 revolutions per minute (rpm) and meshes directly with a gear of 40 teeth. How does the 40-tooth gear turn?",
          "options": [
            {
              "icon": "⚙️",
              "label": "Clockwise at 30 rpm"
            },
            {
              "icon": "⚙️",
              "label": "Anticlockwise at 120 rpm"
            },
            {
              "icon": "⚙️",
              "label": "Anticlockwise at 30 rpm"
            },
            {
              "icon": "⚙️",
              "label": "Clockwise at 120 rpm"
            }
          ]
        },
        {
          "question": "A 50 kg crate is raised at a steady speed by pulling down on a rope that runs over one fixed pulley hung from the ceiling. Ignoring friction and the weight of the rope, how does your pull compare with the crate’s weight?",
          "options": [
            {
              "icon": "🔩",
              "label": "It is exactly equal to the weight of the crate"
            },
            {
              "icon": "🔩",
              "label": "It is half the weight of the crate"
            },
            {
              "icon": "🔩",
              "label": "It is twice the weight of the crate"
            },
            {
              "icon": "🔩",
              "label": "It is a quarter of the weight of the crate"
            }
          ]
        },
        {
          "question": "A tall, thin container and a short, wide container are joined by a pipe near their bases. Water is poured in and left to settle. How do the water levels compare?",
          "options": [
            {
              "icon": "💧",
              "label": "The level is higher in the tall, thin container"
            },
            {
              "icon": "💧",
              "label": "The level is higher in the short, wide container"
            },
            {
              "icon": "💧",
              "label": "The level depends on how wide the pipe is"
            },
            {
              "icon": "💧",
              "label": "The water settles at the same level in both containers"
            }
          ]
        },
        {
          "question": "A plank is balanced on a pivot at its centre. A 400 N child sits 3 m from the pivot. How far from the pivot must a 600 N child sit, on the other side, to keep the plank level?",
          "options": [
            {
              "icon": "⚖️",
              "label": "2 m"
            },
            {
              "icon": "⚖️",
              "label": "3 m"
            },
            {
              "icon": "⚖️",
              "label": "4.5 m"
            },
            {
              "icon": "⚖️",
              "label": "6 m"
            }
          ]
        },
        {
          "question": "Three gears, A, B and C, are meshed in a row so that A drives B and B drives C. Gear A turns clockwise. How do B and C turn?",
          "options": [
            {
              "icon": "⚙️",
              "label": "B anticlockwise, C clockwise"
            },
            {
              "icon": "⚙️",
              "label": "B clockwise, C anticlockwise"
            },
            {
              "icon": "⚙️",
              "label": "B anticlockwise, C anticlockwise"
            },
            {
              "icon": "⚙️",
              "label": "B clockwise, C clockwise"
            }
          ]
        },
        {
          "question": "A spring is 20 cm long with nothing on it and 24 cm long when a 2 N weight hangs from it. How long is it with a 5 N weight, if it is not overstretched?",
          "options": [
            {
              "icon": "🔩",
              "label": "30 cm"
            },
            {
              "icon": "🔩",
              "label": "10 cm"
            },
            {
              "icon": "🔩",
              "label": "26 cm"
            },
            {
              "icon": "🔩",
              "label": "29 cm"
            }
          ]
        },
        {
          "question": "A hydraulic jack has a small piston of 4 cm² and a large piston of 80 cm². A 50 N force pushes on the small piston. What force can the large piston exert at most?",
          "options": [
            {
              "icon": "💧",
              "label": "200 N"
            },
            {
              "icon": "💧",
              "label": "2.5 N"
            },
            {
              "icon": "💧",
              "label": "50 N"
            },
            {
              "icon": "💧",
              "label": "1,000 N"
            }
          ]
        },
        {
          "question": "A 1.5 m crowbar is used to lift a rock. The pivot sits 0.3 m from the rock, and you push down on the far end of the bar with 200 N. What force does the bar apply to the rock?",
          "options": [
            {
              "icon": "⚖️",
              "label": "1,000 N"
            },
            {
              "icon": "⚖️",
              "label": "200 N"
            },
            {
              "icon": "⚖️",
              "label": "800 N"
            },
            {
              "icon": "⚖️",
              "label": "50 N"
            }
          ]
        },
        {
          "question": "A bicycle has a pedal gear of 48 teeth joined by a chain to a rear sprocket of 16 teeth, which is fixed to the rear wheel. The wheel travels 2.1 m per turn. The rider pedals at 60 turns a minute. How far does the bicycle travel in one minute?",
          "options": [
            {
              "icon": "⚙️",
              "label": "126 m"
            },
            {
              "icon": "⚙️",
              "label": "378 m"
            },
            {
              "icon": "⚙️",
              "label": "42 m"
            },
            {
              "icon": "⚙️",
              "label": "1,134 m"
            }
          ]
        },
        {
          "question": "A block and tackle has four rope sections supporting its lower block, which carries an 800 N load. Ignoring friction and the weight of the blocks, how far and with what force must the free end of the rope be pulled to raise the load by 0.5 m?",
          "options": [
            {
              "icon": "🔩",
              "label": "0.5 m, with 800 N"
            },
            {
              "icon": "🔩",
              "label": "2 m, with 800 N"
            },
            {
              "icon": "🔩",
              "label": "2 m, with 200 N"
            },
            {
              "icon": "🔩",
              "label": "0.125 m, with 3,200 N"
            }
          ]
        },
        {
          "question": "A hydraulic press has a small piston of 5 cm² and a large piston of 100 cm². The small piston is pushed down by 8 cm. How far does the large piston rise?",
          "options": [
            {
              "icon": "💧",
              "label": "8 cm"
            },
            {
              "icon": "💧",
              "label": "0.4 cm"
            },
            {
              "icon": "💧",
              "label": "160 cm"
            },
            {
              "icon": "💧",
              "label": "0.04 cm"
            }
          ]
        },
        {
          "question": "A wheelbarrow carries a 600 N load whose weight acts 0.4 m from the wheel’s axle. You lift the handles with a force acting 1.2 m from the axle. What force is needed to just lift the handles? Ignore the weight of the wheelbarrow itself.",
          "options": [
            {
              "icon": "⚖️",
              "label": "300 N"
            },
            {
              "icon": "⚖️",
              "label": "600 N"
            },
            {
              "icon": "⚖️",
              "label": "200 N"
            },
            {
              "icon": "⚖️",
              "label": "1,800 N"
            }
          ]
        },
        {
          "question": "A winch has a drum of 10 cm radius turned by a handle that moves in a circle of 40 cm radius. Ignoring friction, what force on the handle, pushed at right angles to it, just lifts a 400 N load hung on the drum’s rope?",
          "options": [
            {
              "icon": "⚙️",
              "label": "80 N"
            },
            {
              "icon": "⚙️",
              "label": "400 N"
            },
            {
              "icon": "⚙️",
              "label": "1,600 N"
            },
            {
              "icon": "⚙️",
              "label": "100 N"
            }
          ]
        },
        {
          "question": "A 10 N weight stretches one spring by 4 cm. Two identical springs are now hung side by side from the same support, and the same 10 N weight is hung from both of them equally. How far do they stretch?",
          "options": [
            {
              "icon": "🔩",
              "label": "4 cm"
            },
            {
              "icon": "🔩",
              "label": "8 cm"
            },
            {
              "icon": "🔩",
              "label": "2 cm"
            },
            {
              "icon": "🔩",
              "label": "1 cm"
            }
          ]
        },
        {
          "question": "A block weighing 600 N stands on a table, resting on a face of 0.2 m². It is then turned to stand on a face of 0.1 m². What happens to the pressure the block puts on the table?",
          "options": [
            {
              "icon": "💧",
              "label": "It doubles, from 3,000 Pa to 6,000 Pa"
            },
            {
              "icon": "💧",
              "label": "It stays at 3,000 Pa"
            },
            {
              "icon": "💧",
              "label": "It halves, from 3,000 Pa to 1,500 Pa"
            },
            {
              "icon": "💧",
              "label": "It quadruples, from 3,000 Pa to 12,000 Pa"
            }
          ]
        },
        {
          "question": "A light rod 100 cm long is pivoted at its 50 cm mark. A 6 N weight hangs from the 10 cm mark and a 4 N weight from the 90 cm mark. Where must a 2 N weight be hung to make the rod balance level?",
          "options": [
            {
              "icon": "⚖️",
              "label": "At the 70 cm mark"
            },
            {
              "icon": "⚖️",
              "label": "At the 100 cm mark"
            },
            {
              "icon": "⚖️",
              "label": "At the 10 cm mark"
            },
            {
              "icon": "⚖️",
              "label": "At the 90 cm mark"
            }
          ]
        },
        {
          "question": "Gear A (12 teeth) meshes with gear B (36 teeth). Gear C (10 teeth) is fixed on the same shaft as B and meshes with gear D (40 teeth). Gear A turns at 240 rpm. How fast does D turn?",
          "options": [
            {
              "icon": "⚙️",
              "label": "20 rpm"
            },
            {
              "icon": "⚙️",
              "label": "80 rpm"
            },
            {
              "icon": "⚙️",
              "label": "180 rpm"
            },
            {
              "icon": "⚙️",
              "label": "320 rpm"
            }
          ]
        },
        {
          "question": "A 400 N load hangs from a rope that passes over one fixed pulley bolted to the ceiling. You hold the other end of the rope still, and both parts of the rope hang straight down. Ignoring friction and the weight of the pulley and rope, what force pulls down on the ceiling bolt?",
          "options": [
            {
              "icon": "🔩",
              "label": "400 N"
            },
            {
              "icon": "🔩",
              "label": "200 N"
            },
            {
              "icon": "🔩",
              "label": "1,600 N"
            },
            {
              "icon": "🔩",
              "label": "800 N"
            }
          ]
        },
        {
          "question": "A sealed syringe holds 60 cm³ of air at a pressure of 120 kPa. The plunger is pushed in slowly until the air takes up 20 cm³, with the temperature kept constant. What is the pressure of the air now?",
          "options": [
            {
              "icon": "💧",
              "label": "40 kPa"
            },
            {
              "icon": "💧",
              "label": "360 kPa"
            },
            {
              "icon": "💧",
              "label": "120 kPa"
            },
            {
              "icon": "💧",
              "label": "240 kPa"
            }
          ]
        },
        {
          "question": "A uniform plank 3 m long weighs 200 N. It rests on two supports: one under its left end and one 1 m from its right end. What load does the support at the left end carry?",
          "options": [
            {
              "icon": "⚖️",
              "label": "100 N"
            },
            {
              "icon": "⚖️",
              "label": "50 N"
            },
            {
              "icon": "⚖️",
              "label": "150 N"
            },
            {
              "icon": "⚖️",
              "label": "200 N"
            }
          ]
        },
        {
          "question": "A gear with 15 teeth turns at 120 rpm with a torque (turning force) of 8 N·m. It drives a meshed gear with 60 teeth. Ignoring losses, what torque and speed does the 60-tooth gear have?",
          "options": [
            {
              "icon": "⚙️",
              "label": "2 N·m at 480 rpm"
            },
            {
              "icon": "⚙️",
              "label": "32 N·m at 480 rpm"
            },
            {
              "icon": "⚙️",
              "label": "32 N·m at 30 rpm"
            },
            {
              "icon": "⚙️",
              "label": "8 N·m at 120 rpm"
            }
          ]
        },
        {
          "question": "Three identical springs hold a 6 N weight. Two hang side by side from a bar, and the third hangs below them, joining the pair to the weight. One spring alone stretches 3 cm under 6 N. How far does the whole arrangement stretch?",
          "options": [
            {
              "icon": "🔩",
              "label": "3 cm"
            },
            {
              "icon": "🔩",
              "label": "6 cm"
            },
            {
              "icon": "🔩",
              "label": "1.5 cm"
            },
            {
              "icon": "🔩",
              "label": "4.5 cm"
            }
          ]
        },
        {
          "question": "A tank 4 m long and 5 m wide is filled with water to a depth of 3 m. A circular plug of area 0.01 m² seals a hole in the bottom. Water produces a pressure of 10,000 Pa for every metre of depth. What force does the water exert on the plug?",
          "options": [
            {
              "icon": "💧",
              "label": "150 N"
            },
            {
              "icon": "💧",
              "label": "300 N"
            },
            {
              "icon": "💧",
              "label": "30,000 N"
            },
            {
              "icon": "💧",
              "label": "600,000 N"
            }
          ]
        },
        {
          "question": "A uniform metre rule is pivoted at its 40 cm mark. A 90 g mass hung from the 10 cm mark makes the rule balance level. What is the mass of the rule?",
          "options": [
            {
              "icon": "⚖️",
              "label": "270 g"
            },
            {
              "icon": "⚖️",
              "label": "30 g"
            },
            {
              "icon": "⚖️",
              "label": "90 g"
            },
            {
              "icon": "⚖️",
              "label": "360 g"
            }
          ]
        }
      ],
      "results": {
        "developing": {
          "name": "Building Mechanical Foundations",
          "desc": "Several questions went the other way. Levers, gears, pulleys and pressure follow a short list of rules, and each rule can be learned quickly from worked examples.",
          "recommendation": "Take one idea at a time: the lever rule (force × distance), then gear ratios, then pulleys. Work three simple examples of each before you time yourself."
        },
        "average": {
          "name": "Practical Mechanical Thinker",
          "desc": "You handle the everyday mechanical ideas, such as balancing loads, meshed gears and simple pulleys. Where you slip is mostly the multi-step setups: compound gear trains, combined springs and pressure in a closed fluid.",
          "recommendation": "Practise the multi-step cases. Write the ratio for each stage, then multiply, and ask whether the heavier or slower side makes sense before you choose."
        },
        "above_average": {
          "name": "Confident Mechanical Reasoner",
          "desc": "Your mechanical reasoning is solid across levers, gears, pulleys and fluids. The slips that remain tend to be single details: which distance is measured from the pivot, or how many rope sections share the load.",
          "recommendation": "Go back over the questions where one detail changed the answer and name the rule you missed. Timed sets of mixed problems are the best next step."
        },
        "superior": {
          "name": "Strong Mechanical Reasoner",
          "desc": "You work through multi-step mechanical setups reliably, including gear trains, spring arrangements and pressure in liquids and gases. This is the kind of reasoning that technical and trades work leans on every day.",
          "recommendation": "Put it to use: take on a small repair or build, or an engineering-fundamentals course, so the reasoning turns into hands-on skill."
        },
        "exceptional": {
          "name": "Mechanical Reasoning Standout",
          "desc": "Top band: you answered almost every question correctly, including the multi-step gear, spring and pressure problems. A short in-house test is a snapshot, not a certification, so read it as a strong signal about this set of problems.",
          "recommendation": "If you are preparing for a mechanical aptitude assessment, move to timed mixed sets. If you work with machines, formal training in the area that interests you most is the natural next step."
        }
      },
      "retakePrompt": {
        "lastResult": "Last time you scored as: {result}",
        "evolvedHint": "Mechanical reasoning is trainable. After practice with levers, gears and pulleys, your score should rise.",
        "retakeButton": "Retake Mechanical Reasoning Test"
      },
      "optionOrderVersion": "d75879cfb74db1a1"
    }
  },
  "testNames": {
    "mechanical-reasoning": "Mechanical Reasoning Test"
  }
}