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Which insect in the accompanying figure represents a group that parasitizes plants?
  a. 1
  b. 2
  c. 3
  d. 4
  e. 5

What could be the potential cause if a vehicle only overheats after idling stationary for an extended period of time? ? Coolant flow through the radiator restricted by scale build up ? Faulty cooling fan ? Faulty temperature gauge ? Air trapped in the cooling system
What should you do before disassembling the oil pump? ? Remove the oil filter. ? Measure the level of oil in the oil pan. ? Check for galling. ? Mark the gear teeth.
Why does engine coolant consist of water mixed with antifreeze? ? To enable better circulation ? To eliminate hot spots in the engine ? To regulate the freezing and boiling points ? To improve fuel efficiency
Which of the following can be used to test a cooling system for leaks? ? Infrared thermometer ? Refractometer ? Test strips ? Radiator pressure tester
Where is an external engine oil cooler located? ? Near the front of the engine ? Attached to the timing cover ? Bottom of the crankcase ? Near the oil pan
Which of the following is a type of oil pump? ? Pan baffle ? Dry sump ? Rotor type ? Wet sump
What is the benefit of an electric water pump? ? More efficient radiator operation ? Improved fuel efficiency ? Lower hood profile ? Higher pressurized coolant
When must a thermostat be fully opened? ? At 1.67°C (3°F) below its temperature rating ? At 11.1°C (20°F) above the start-to-open temperature ? At 11.1°C (20°F) below the start-to-open temperature ? At 1.67°C (3°F) above its temperature rating
Where is the coolant thermostat commonly located? ? At the radiator inlet ? Near the bottom of the block ? At the radiator outlet ? In the water outlet housing at the engine block
Where is the coolant thermostat commonly located? ? At the radiator inlet ? Near the bottom of the block ? At the radiator outlet ? In the water outlet housing at the engine block
How much warm-up time does a block heater require? ? A short warm-up period ? As long as possible ? Depends on the outdoor temperature ? Depends on the block heater
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