When a vehicle is started, the coolant temperature should: Before you start the test, please answer the question below regarding your insurance status. Without insurance you will not be able to drive in Nebraska Do you currently have motorcycle insurance? Yes I have insurance. Great, you're all set! Click here if you still want to compare rates. No, I need insurance. Click here to compare rates from our insurance partner. Question When a vehicle is started, the coolant temperature should: Answers Decrease. Rise slowly. Jump quickly. Explanation After an engine is started, the coolant temperature should rise gradually to a normal operating range. This questions appears in the following tests: Arizona Class B Knowledge Test Idaho Class A Knowledge Test Idaho Bus Iowa Tank Missouri Class B Knowledge Test Oregon Tank Vermont Class B Knowledge Test Virginia Class A Knowledge Test Virginia Class B Knowledge Test