22.1 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
In an external combustion engine, the fuel burns outside the system to heat water / fuel.
22.2 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
A sparkplug is used to deliver electric current from the ignition system to the connecting rods / combustion chamber.
22.3 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
An exhaust manifold carries the burnt gases out of the cylinder after combustion / compression.
22.4 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
A cooling water jacket is a series of hollow passages that allow coolant to circulate around the engine / crankshaft.
22.5 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
In the intake stroke, the piston moves down and the intake valve closes / opens.
22.6 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
In the exhaust stroke, the piston moves up one more time, and the exhaust valve opens to let the burnt gases leave the piston / cylinder.
22.7 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
Diesel engines are less / more fuel-efficient than petrol engines.
22.8 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
Inside the battery, there is a chemical substance called electrolyte / cathode.
22.9 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
The regenerative braking systems temporarily turn the electric motor into a/an generator / alternator when the car slows down.
22.10 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
Hydrogen cars have electric engines, but their electricity comes from a chemical reaction between hydrogen and lithium / oxygen.
22.11 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
Having no connecting rods or valves / pistons like conventional engines, rotary engines have fewer moving parts.
22.12 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
A/An alternator / battery is an electricity-generating device that converts mechanical energy into electrical energy.
22.13 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
A caliper / brake rotor is a disc-shaped component that revolves with hub and wheel. It is forced against the pad.
22.14 Choose the correct option to complete the sentence. To underline a multi-word expression (if necessary), click each word individually.
A catalytic converter changes harmful gases into less dangerous ones, while the tailpipe / muffler reduces noise.
23.1 Translate this sentence into English: Un motore è un dispositivo che trasforma un tipo di energia in movimento meccanico.
aperta
Soluzione suggerita: An engine is a device that transforms some type of energy into mechanical motion.
23.2 Translate this sentence into English: La funzione del pistone è trasferire la forza generata dai gas in espansione nel cilindro all’albero motore.
aperta
Soluzione suggerita: The purpose of the piston is to transfer force from the expanding gas in the cylinder to the crankshaft.
23.3 Translate this sentence into English: Nella fase di potenza, i gas in combustione si espandono rapidamente e spingono il pistone verso il basso.
aperta
Soluzione suggerita: In the power stroke the burning gases expand quickly and push the piston down.
23.4 Translate this sentence into English: Nel motore diesel, l’aria all’interno del cilindro viene compressa a una pressione molto alta, aumentando la sua temperatura.
aperta
Soluzione suggerita: In the diesel engine, the air inside the cylinder is compressed to very high pressure, raising its temperature.
23.5 Translate this sentence into English: A differenza dei veicoli tradizionali, le auto elettriche non producono emissioni nocive, quindi sono più pulite per l’ambiente.
aperta
Soluzione suggerita: Unlike traditional vehicles, electric cars produce no harmful emissions, so they are cleaner for the environment.
23.6 Translate this sentence into English: Le auto solari sono alimentate principalmente dall’energia raccolta dai pannelli solari posti sulla loro superficie.
aperta
Soluzione suggerita: Solar cars are powered primarily by energy collected from the solar panels placed on their surfaces.
23.7 Translate this sentence into English: La funzione dell’impianto elettrico è fornire e controllare l’energia elettrica per il funzionamento di tutti i componenti elettronici del veicolo.
aperta
Soluzione suggerita: The function of the electrical system is to supply and control electrical power for all the electronic components in the vehicle.
23.8 Translate this sentence into English: Il sistema di sicurezza delle auto è progettato per proteggere i passeggeri e ridurre il rischio di lesioni in caso di incidente.
aperta
Soluzione suggerita: The safety system of cars is designed to protect passengers and reduce the risk of injury in accidents.