Block 3 Quiz Basic Engine Systems

Compression ratio is calculated as:

• (Bore x Stroke)/Cylinders

• Swept volume/Clearance volume

• (Swept vol + Clearance vol)/Clearance vol

• Displacement x RPM

SAE 5W-30 oil designation means:

• 5W viscosity at -30°C

• 30W viscosity at operating temp

• Both winter and operating viscosity

• Weight classification 5

Typical thermostat opening temperature is:

• 65°C

• 78°C

• 88°C

• 100°C

Minimum oil pressure at idle should be:

• 5 psi

• 10 psi

• 15 psi

• 20 psi

Oil degradation is measured by:

• Color darkness

• Viscosity change

• TBN/TAN levels

• Odor

Coolant ethylene glycol concentration should be:

• 10-20%

• 25-35%

• 40-60%

• 70-90%

Air filter replacement indicator is:

• Color change

• Weight increase

• Pressure drop

• Noise level

Safety zone around welding should be: (Review)

• 1m radius

• 3m radius

• 5m radius

• 10m radius

COSHH requires SDS to be: (Review)

• Memorized

• Available within 24hrs

• Easily accessible

• Stored offsite

RIDDOR applies to: (Review)

• Minor first-aid incidents

• Dangerous occurrences

• Staff meetings

• Equipment purchases