NAFI Test Exam Questions And Answers Verified 100% Correct

NAFI Test Exam Questions And Answers Verified 100% Correct There are two basic fuel systems used in gasoline powered motor vehicles: a. vacuum/low pressure carbureted system b. high pressure fuel injected system c. both a & b d. neither a or b - ANSWER c. both a & b The flash point of gasoline is approximately _____. a. 100* F b. 212* F c. -45* F d. 25* F - ANSWER c. -45* F Compared to gasoline, brake fluid is a higher flash point liquid. a. True b. False - ANSWER a. True Gasoline will normally not ignite on a hot surface but requires a(n) __________ for ignition. a. arc b. spark c. open flame d. any of the above - ANSWER d. any of the above In high-pressured fuel injected systems, the fuel is typically pumped from a storage tank under pressure of: a. 10-15 PSI b. 20-25 PSI c. 35-70 PSI d. 110-160 PSI - ANSWER c. 35-70 PSI (answer sheet says C or D) The fuel pump will run when the ignition key is in the _______ position. a. accessory b. off c. run d. all of the above - ANSWER c. run Leaks that develop on the supply side of the fuel lines system may present operational problems that should be noticed by the operator whereas on the return side of the system may ______________. a. cause the engine to stall b. go undetected by the operator c. appear as warning lights d. cause the engine to race - ANSWER b. go undetected by the operator In a vehicle equipped with a fuel injection system; if a fuel leak was to occur on the supply side, there is sufficient pressure to project a small fuel stream several feet in distance. a. True b. False - ANSWER a. True The pressure from the mechanical fuel pump to the carburetor system is typically in the rate of _____ PSI. a. 3-5 b. 10-20 c. 32 d. 32-70 - ANSWER a. 3-5 When exposed to heat energy from a fire, the rate of vaporization of the gasoline in the fuel tank will increase significantly. a. True b. Fals - ANSWER a. True Sparks, as a possible source of ignition energy, especially for gasses, vapors or liquid vapors in a spray or mist form may reach temperatures as high as _____ in a vehicle traveling less than 5 mph. The major components of the emission control system are: a. the exhaust gas re-circulation valve. b. charcoal canister c. variety of rubber vacuum hoses and sensors d. all of the above - ANSWER d. all of the above The decoding of a vehicle identification number (VIN) will provide the investigator with information regarding: a. manufacturer b. engine type c. year of manufacture d. all of the above - ANSWER d. all of the above Federal Motor Vehicle Safety Standard 301 is intended specifically to reduce the fire hazard resulting from ____________. a. transmission fluid b. motor oil c. brake fluids d. motor fuel - ANSWER d. motor fuel The lamp filaments of broken bulbs area source of ignition energy since the filament has a temperature in the order of _______. a. 36* F b. 100* F c. 1000* F d. 2550 * F - ANSWER d. 2550* F Federal Motor Vehicle Safety Standard (FMVSS) for vehicle interior materials flammability is ___________. a. FMVSS 208 b. FMVSS 210 c. FMVSS 301 d. FMVSS 302 - ANSWER d. FMVSS 302 Modern upholstery, fabrics and materials in vehicles by their chemical nature are generally easy to ignite with a cigarette.