All of these concerns can be diagnosed using the paper test except for a a. burned valve.
b. bad spark plug wire in the ignition system.
c. faulty injector on a multi-port engine.
d. cracked exhaust manifold.

cracked exhaust manifold.

Explanation:

When diagnosing some problems in a car engine, a paper test can be utilized to examine and assess for a probable problem that the car is experiencing. Some of the car engine problems a paper test can easily identify are:

1. The ignition system is a bad spark plug wire in a car.

2. A faulty injector on a multiport engine

3. A burned valve

Hence, in this case, the correct answer is "cracked exhaust manifold." This is because to check for a cracked exhaust manifold in a car engine, one is expected to look out for unusual noises like a whistling sound. This type of symptom does not require a paper test.

oil flow is a highly convective flow compared to water flow at normal temperature and pressure.