Blaumann Test | Dieselschrauber

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If a diesel engine is hard to start, the problem could be...
1) diesel engines start poorly especially below 0°C
2) the clutch is slipping
3) there is diesel in the engine
4) air in the injection system
Answer:

How much current flows approximately through a commonly installed glow plug?
1) ~2 Volts
2) ~20 Amperes
3) ~50 Amperes
4) ~12 Volts
Answer:

Diesel pre-chamber engines need glow plugs for cold starting because...
1) the injection pressure is not high enough
2) the chamber surface removes too much heat
3) the injection pressure is too high
4) pre-chamber engines do not need glow plugs
Answer:

The glow plug has the characteristic of a PTC. That means...
1) at increased temperature, the resistance increases
2) at increased temperature, the resistance stays the same
3) at increased temperature, the resistance decreases
4) with greater resistance, it heats up more
Answer: