Download 310T Practice Exam #2 (136 Q&A) 100% Verified| A+ Score Rated A+ and more Exams Banking Law and Practice in PDF only on Docsity!
310T Practice Exam #2 (136 Q&A) 100%
Verified| A+ Score.
Which of the following tools can be used to cut new external threads?! A die A thread pitch gauge A tap A thread chaser - ✔✔✔A die
During a PM inspection a broken radiator fan shroud is noticed. Which of the following could cause this damage?! Loose fan belts A failed fan hub clutch A broken engine mount An out of balance fan assembly - ✔✔✔A broken engine mount
During a PM inspection the steering wheel binds when turned. What could cause this condition?! Excessive sector gear to ball nut clearance in the steering gear Worn king pin bushings Worn steering shaft universal joints Worn tie rod ends - ✔✔✔Worn steering shaft universal joints
Although any loose or missing bolts should be tightened or replaced when noticed, what percentage of fifth wheel mounting bracket to frame fasteners can be loose or missing before the tractor must be placed out of service?! 10% 20% 30% 40% - ✔✔✔20%
What type of tubing must be used in hydraulic brake systems?! Single wall thickness steel tubing Double wall thickness steel tubing Single wall thickness copper tubing Double wall thickness copper tubing - ✔✔✔Double wall thickness steel tubing
When cutting with an oxy-acetylene torch, what should you see in the steel before depressing the cutting lever?! A small liquid puddle A change in steel colour A change in steel colour to red A change in flame colour to red - ✔✔✔A small liquid puddle
What is the reading on this 2-3" imperial micrometer?! 2.341" 2.016" 2.516"
Close to the upper frame flange Along each edge of the plate - ✔✔✔In a staggered bolt pattern
What should be used to lubricate the rack and slide path of a sliding fifth wheel?! All purpose grease SAE 30 engine oil Water resistant lithium based grease Mixture of light oil and diesel fuel - ✔✔✔Mixture of light oil and diesel fuel
When will the ride height control valve supply more air to the air springs?! When more load is applied to the truck When less load is applied to the truck When uneven terrain is encountered When the compressor begins its loaded cycle - ✔✔✔When more load is applied to the truck
What must be performed on a truck suspension system to adjust torque rod length and drive axle alignment?! Adjust the nuts on the U-bolts Add additional spring wedges Remove or add washers (shims) Adjust the position of the spring hangers - ✔✔✔Remove or add washers (shims)
What type of truck spring suspension system would be mounted above the main leaf spring assembly and only be utilized under heavy leads?!
An air spring suspension A constant spring suspension An auxiliary spring suspension A coil spring suspension - ✔✔✔An auxiliary spring suspension
What component is used to control jounce and rebound and suppress truck suspension system oscillations?! An air spring A shock absorber A leaf spring A helper spring - ✔✔✔A shock absorber
When diagnosing a leaf spring suspension complaint of harsh ride which of the following could be the cause?! Seized front spring shackle pins Tires under-inflated Broken leaf spring Inadequate fifth-wheel lubrication - ✔✔✔Seized front spring shackle pins
Which of the following is correct practice when mounting accessories to the heat- treated frame of a truck?! Never drill the web of the frame rail Never weld on the web of the frame rail Never drill or weld on the flange of the frame rail Never attach anything to the frame web - ✔✔✔Never drill or weld on the flange of the frame rail
Over-inflated tires Seized spring pins - ✔✔✔One or more broken leaf springs
How are straight king pins secured to the axle on a truck's front steering axle?! A cotton pin A tapered draw key A locknut A tapered cup and cone bearing - ✔✔✔A tapered draw key
While observing tire wear patterns and front-end alignment, which alignment angle has the potential to cause the most tire wear?! Incorrect caster angles Incorrect camber angles Incorrect king pin inclination Incorrect toe settings - ✔✔✔Incorrect toe settings
When testing a truck's hydraulic steering system, what is important to achieve accurate results?! The hydraulic steering system oil should be cold The engine oil should be at operating temperature The steering system oil should be at operating temperature Hydraulic steering oil temperature is not important when testing - ✔✔✔The steering system oil should be at operating temperature
What is the recommended method of deflating a truck tire?!
Use a screwdriver to depress and hold the Schrader valve pin Remove the Schrader valve core completely Separate the bead of the tire from the rim Fracture the valve stem, allowing all of the air to escape - ✔✔✔Remove the Schrader valve core completely
What could cause low-pressure readings when resting a hydraulic power steering system?! A worn hydraulic steering pump A relief valve is stuck closed A restricted steering valve A bent or damaged pitman arm - ✔✔✔A worn hydraulic steering pump
What could cause wheel tramp?! An overload condition An under-inflated tire A broken spring pack Static unbalance of a wheel assembly - ✔✔✔Static unbalance of a wheel assembly
Which of the following conditions on an air brake system could cause a high discharge of oil from the supply reservoir drain value?! Governor setting too high Governor setting too low A restricted lubricating oil return passage in the compressor Compressor drive belt slipping excessively - ✔✔✔A restricted lubricating oil return passage in the compressor
While troubleshooting an air pressure build up complaint you find no air pressure at the inlet side of the supply reservoir. What could be the cause?! A restricted air dryer Governor setting too high An empty alcohol evaporator A defective automatic discharge valve - ✔✔✔A restricted air dryer
What would the effect be of a brake drum that has been worn too thin?! The drum will split and crack Brakes would pull or grab Shoes and drum would heat up quickly S-cam would be unable to rotate - ✔✔✔Shoes and drum would heat up quickly
If the air compressor governor failed to cut out, which of the following would result?! The regulator valve would stop the compressor The system safety valve would open The compressor's performance would not be affected The dash gauges would indicate normal governor cut-out pressure - ✔✔✔The system safety valve would open
What safety precautions must be followed when working on pressurized air brake components?! Always wear safety glasses and drain air pressure before dismantling components Not to worry, pressurized air is not dangerous Draining air pressure is not required before dismantling components
Air pressure in a brake system is contained and cannot leak out when dismantled - ✔✔✔Always wear safety glasses and drain air pressure before dismantling components
In a B-train combination which of the following relay valves would likely have the lowest crack pressure?! The front tractor axle The rear drive axle The pup axle The lead trailer axle - ✔✔✔The pup axle
Which of the following would be an output of the ECU (electronic control unit) of an air brake ABS (anti-lock brake system)?! The ABS indicator dash light The exciter ring The brake treadle valve The speed sensor - ✔✔✔The ABS indicator dash light
Brake wear is uneven on only one side of the shoes. What should be checked?! Anchor pins and bushings Improper sized shoes Worn S-cam bushings ABS sensor out of adjustment - ✔✔✔Anchor pins and bushings
What is the desired air gap between the ABS wheel speed sensor and the exciter ring?! 1/4" (6.25mm)
None, as all S-cams are identical Check for S-cam roller lubrication Test Rockwell hardness - ✔✔✔Identify if a left or right hand S-cam is required
What results when the dash-mounted trailer air supply valve (red) is pulled outward (closed)?! Air is directed through the tractor protection valve The trailer air supply line is fully charged The tractor parking brakes are applied The trailer parking brakes are applied - ✔✔✔The trailer parking brakes are applied
When servicing an air dryer what also requires replacement?! Purge valve Heater element Desiccant filter Governor - ✔✔✔Desiccant filter
When the inversion valve of an air brake vehicle is in effect, what does it modulate to slow the vehicle?! Holds off pressure in the spring brake chamber Directs air pressure to the service side of the dual chamber Releases stored air pressure from a separate reservoir Applies hydraulic pressure to the brakes - ✔✔✔Holds off pressure in the spring brake chamber
What type of signal does an ABS wheel speed sensor provide?! A digital signal A sinewave An AC pulse A diode - ✔✔✔An AC pulse
On an air brake equipped truck that is CMVSS 121 compliant, what is the minimum air pressure before the low air warning device will activate?! 90 psi 60 psi 100 psi 120 psi - ✔✔✔60 psi
On an air brake equipped truck that is CVSA compliant, what specification must be achieved when testing the compressor buildup time?! 25-120 psi in 5 minutes or less 75-100 psi in 25 seconds or less 85-100 psi in 4 minutes or less 85-100 psi in 2 minutes or less - ✔✔✔85-100 psi in 2 minutes or less
A 12-V lead-acid battery with an electrolyte temperature of 20°is voltage tested out of chassis and produces a voltage reading of 12.4 V across its terminals. Which of the following is more likely to be true?! Battery is fully discharged Battery is 50% charged Battery is nearly fully charged
Alternator ground clamp Directly to a battery negative post Directly to a battery positive post - ✔✔✔Directly to a battery negative post
A driver complains his radio produces constant static and his newly replaced batteries are often too discharged to crank the engine. After ensuring that the batteries are fully charged, which of the following should you check first?! Alternator AC leakage Alternator amperage output Cranking motor ground integrity Battery warranty - ✔✔✔Alternator AC leakage
You are measuring resistance through an NTC (negative temporary coefficient) thermistor-type temperature sensor and a reading of 75 kilo-ohms is displayed on a DMM (digital micrometer). What should be done?! Discard the sensor, resistance should be close to zero Heat the thermistor using a torch to see if resistance goes up Cool the thermistor using dry ice to see if resistance goes down Nothing. Most good thermistors test between 50 and 100 kilo-ohms resistance - ✔✔✔Nothing. Most good thermistors test between 50 and 100 kilo-ohms resistance
In order to access any system's ECM (electronic control module) to read system faults on a truck chassis data bus, which of the following must be accessed first?! ID (message identifier) ID (subsystem identifier) ID (parameter identifier)
MI (fault mode indicator) - ✔✔✔ID (message identifier)
A truck lead-acid battery at 20°C measures 10.5 V across its terminals. After performing a 2-minute rapid charge, the battery is disconnected from the charger and when voltage is tested across its terminals, it produces15.2 V-DC. Which of the following is the more likely explanation?! Deep cycle battery Frozen electrolyte Shorted battery plates Sulphated battery - ✔✔✔Sulphated battery
When troubleshooting a complaint of sluggish cranking on a truck with batteries that test ok, you observe that one of the battery ground posts is abnormally hot. Which of the following should be performed first?! Test for high resistance at the starter motor positive terminal Voltage drop test across battery cable clamp and post Remove starter motor and check for high resistance at hold in windings Voltage drop test across the insulated battery to starter cable - ✔✔✔Voltage drop test across the insulated battery to starter cable
When testing the amperage output of a heavy-duty truck alternator using an amp clamp, which of the following methods should be used to draw the specified load from the alternator?! Turn on all the lights on the rig Crank the engine for 15 seconds Use a carbon pile Create a temporary short at the starter solenoid - ✔✔✔Use a carbon pile
Heat with a propane torch Trickle charge and observe response - ✔✔✔Trickle charge and observe response
which of the following methods should be observed to crank a hard-to-start, truck diesel engine?! Crank for 2 minutes, rest for 15 seconds Crank for 30 seconds, rest for 2 minutes Crank for 15 seconds, rest for 2 minutes Crank until the batteries die - ✔✔✔Crank for 30 seconds, rest for 2 minutes
When an alternator is full-fielded, which of the following temporarily ceases to function?! Rectifier Rotor magnetic field Voltage regulator Stator - ✔✔✔Voltage regulator
How are the stator windings in a typical truck alternator configured?! Wye connection Delta connection Twisted triad Semi-elliptical - ✔✔✔Delta connection
What specific charging system component is evaluated when you perform an AC leakage test?!
Stator Field windings Diode bridge Voltage regulator - ✔✔✔Diode bridge
When using a DMM to measure voltage, what would happen if you placed the negative terminal on the more positive section of a circuit?! Display reading would be preceded by a MINUS symbol Circuit dead short through the DMM DMM fuse failure DMM circuitboard failure - ✔✔✔Display reading would be preceded by a MINUS symbol
When measuring circuit resistance with a DMM, what will the ohmmeter display when you place the test leads across an open circuit?! Low resistance High resistance OL Zero resistance - ✔✔✔OL
If you have accessed an OEM (original equipment manufacturer) data hub, which of the following must be true?! You are connected to the truck data bus You are connected to a data bus MID You are viewing FMIs You are on-line - ✔✔✔You are on-line
