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310 T EXAM QUESTIONS AND CORRECT ANSWERS!!
When a starter is dismantled, it is observed that the armature has made contact with thefield windings. What is the cause?
A. Open armature winding. B. Open field winding.C. Worn commutator bar. D. Worn armature bushings. D. Worn armature bushings.
What is observed during a road test to verify low power on a diesel engine?
A. Boost and fuel pressures. B. Boost and crankcase pressures. C. Fuel pressure and exhaust temperature. D. Fuel temperature and exhaust back pressure. A. Boost and fuel pressures.
An engine is losing coolant, but there is no external leakage. What is done? A. Pressurize the oil system, then check for oil in the cooling system. B. Pressurize the fuel system, then check for signs of fuel in the coolant. C. Run engine to operating temperature, then check exhaust manifold for poor cylinderperformance with a heat thermometer.
D. Drain the oil, pressurize the cooling system, then check for coolant leaks at the drainplug.
D. Drain the oil, pressurize the cooling system, then check for coolant leaks at the drainplug.
The oil pressure fluctuates on a diesel engine. What is done? A. Check engine oil level, then test engine oil sensor. B. Check engine oil level, then test oil pump and inlet assembly. C. Check engine oil level, then send oil sample for analysis.
D. Connect in series-parallel with the load. A. Connect in series with the load.
A grinding noise is heard when shifting down from high range to low range in a twincountershaft transmission. What is the problem?
A. Faulty transmission slave valve. B. Faulty transmission range selector valve. C. Worn sliding clutch on splitter in auxiliary section. D. Worn synchronizer assembly in the auxiliary section. D. Worn synchronizer assembly in the auxiliary section.
Shortly after an injector has been replaced, engine oil is found to be diluted with fuel.What is done?
A. Replace the fuel regulator valve, then road test. B. Replace the fuel pump and the filter, then road test.
C. Pressure test the fuel gallery, then check for leaks. D. Pressure test the fuel transfer pump, then look for leaks. C. Pressure test the fuel gallery, then check for leaks.
What is the final step before returning a vehicle to service? A. Run the vehicle to operating temperature. B. Clear active fault codes. C. Clear historic fault codes. D. Update vehicle service records. D. Update vehicle service records.
An engine experienced a major connecting rod bearing failure. What is done to the oilcooler during the engine overhaul?
A. Replace core assembly.
A. Oil cooler. B. Purge valve. C. Turbo charger. D. Air compressor. D. Air compressor.
How is the fluid in a power steering system drained? A. By lifting and supporting the axle, disconnecting the pressure line at the reservoir,then turning the steering lock to lock and capture the fluid. B. By lifting and supporting the axle, disconnecting the return line at the reservoir, thenturning the steering lock to lock and capture the fluid. C. By disconnecting the return line at the reservoir, then inserting the suction gun intothe reservoir and capture the fluid. D. By disconnecting the return line at the reservoir, then applying compressed air andcapture the fluid at the reservoir. B. By lifting and supporting the axle, disconnecting the return line at the reservoir, thenturning the steering lock to lock and capture the fluid.
What is the first step to test the function of an antilock relay valve (ARV)? A. Check the antilock modulator between the ARV and the brake chamber. B. Check theARV differential pressure by applying 10 psi to the service port. C. Build the tractor system air pressure to 120 psi and make several service brakeapplications. D. Install a tee fitting at the ARV service port and at one delivery port and install a gaugein each. D. Install a tee fitting at the ARV service port and at one delivery port and install a gaugein each.
A drum with a maximum specification of 16.620 in. measures 16.632 in. in a groove.What is done?
A. Replace the drum assembly. B. Machine 0.012 in. off the drum. C. Machine 0.024 in. off the drum.D. Replace the brake shoes with thicker ones. A. Replace the drum assembly.
What is done to test the pickup coil in an electronic ignition? A. Test coil at 60 °C (140 °F).B. Test the voltage with a voltmeter.
A load of 300 A is required for a 12-V maintenance-free battery with a 600 cold crankingamps rating. After 15 seconds, what is the minimum acceptable voltage reading?
A. 4.6 V B. 8.6 V C. 9.6 VD. 10.6 V C. 9.6 V
An engine is running at 1 000 rpm. On a single-wire alternator, the output reads 12 V and0 A. What is the cause?
A. The battery is defective. B. One positive diode is open. C. One negative diode is open.D. The voltage regulator is defective. D. The voltage regulator is defective.
