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3E052
Power Pro Vol 2
| Question | Answer |
|---|---|
| What tool measures the depth of an item? | Depth Gauge |
| What tool do you use when you must tighten a nut or bolt to a given amount of pressure? | Torque handle |
| To what accuracy does the micrometer measure? | One ten-thousandth (0.0001) of an inch |
| What part of the micrometer is the support for all components? | Frame |
| What part of the micrometer is the stationary measuring surface? | Anvil |
| What part of the micrometer has a stationary scale that is graduated in twenty-five thousandths of an inch? | Barrel |
| Once you reach a certain pressure, what part of the micrometer starts to slip in the direction in which you are turning? | Ratchet stop |
| What part of the micrometer secures the thimble in place and to protect against the accidental moving of the scale once you take the measurement? | Lock |
| What tightness indicates you are to stop turning the thimble of the micrometer when you are measuring a component? | Snug fit. |
| What component converts reciprocating motion, up and down, into rotary motion, round and round? | Crankshaft. |
| What is the name of the top of the piston? | Crown |
| What component transfers the power of the piston to the crankshaft? | Connecting rod. |
| What component forms the top of the combustion chamber? | Cylinder head. |
| What type of energy does the flywheel continually store and release to smooth the erratic operation of the engine? | Kinetic. |
| What term describes the complete movement of a piston? | Stroke. |
| What term describes a complete series of events? | Cycle. |
| What term describes the use of fresh air entering the combustion chamber and pushing the burned gases out? | Scavenging. |
| On a two stroke engine, how long does the power stroke continue? | Until the exhaust valve opens. |
| On a two stroke engine, what pushes the exhaust gases out of the combustion chamber? | The inrush of intake air. |
| On a two stroke engine, what creates this movement of intake air? | Blower. |
| On a two stroke engine, what is the position of the valves and how is the piston moving during the compression event? | Both valves closed and the piston moving upward. |
| What provides an electrical spark in the combustion chamber at the proper time to ignite the air/fuel mixture? | Ignition system. |
| What prevents the voltage in an ignition system from arcing across the breaker points, causing them to burn? | Condenser. |
| What type of ignition system uses a permanent magnet to provide the power? | Magneto. |
| When you make an adjustment the low-speed air/fuel mixture by initially adjusting the needle valve all the way in, what adjustment do you then make? | Backing it off 1½ turns. |
| What can you use to get better adjustments of the air/fuel mixtures of a carburetor? | Vacuum gauge. |
| What do you use to check the gap of a spark plug to make sure it is at the specified distance? | Thickness gauge. |
| What fits into irregularities that exist on surfaces as you connect two engine components? | Gaskets. |
| Generally, from where do you remove the camshaft from the engine? | Front of the engine. |
| How do you time camshafts of gear-driven diesels to the crankshaft? | Aligning special marks placed on the gears by the manufacturer. |
| Generally in how many stages do you tighten the cylinder head to the specified torque? | 3. |
| What type of corrosion can be one of the most common forms of corrosion as well as one of the most destructive? | Galvanic. |
| What type of corrosion do we find most on aluminum? | Pitting. |
| What type of corrosion is a further form of inter-granular corrosion associated with high strength aluminum alloys? | Exfoliation. |
| What is the key to a good corrosion control program? | Preventive maintenance. |
| How does oil with high viscosity flow and pour? | In a sluggish manner. |
| What characteristic does oil with the grade of Society of Automotive Engineers (SAE) 5W–40 contain during cold winter months? | SAE 5W. |
| What is the ability of a thin layer of oil to hold together when we apply heavy loads to it? | Film strength. |
| What is the property that makes oil capable of holding foreign particles suspended until the filter can remove them? | Detergency. |
| Against what does the protective film of oil seal the internal engine parts? | Oxygen and moisture in the air. |
| Which oil pressure gauge uses direct pressure on the gauge to indicate the pressure? | Mechanical. |
| What is a protective device that shuts the engine down if oil pressure gets low? | Oil pressure switch. |
| Where does oil go once the cool, clean oil leaves the filter? | Main oil gallery. |
| What is one way for oil to get to and spray the valve train components? | Hollow push rods. |
| What can reduce the cooling capacity of the oil storage system? | Low oil levels. |
| What component collects most contaminates in the lubricating oil? | Oil filter. |
| For how long do you operate the engine before you change the engine oil? | Until it reaches operating temperature. |
| You are adding new oil into the system; before you close the drain to push the old oil remaining in the bottom of the sump out, when do you close the drain? | Once the oil pouring out of the drain becomes clear. |
| What, in addition to sulfur from the fuel, may get into the engine oil and form sulfuric acid? | Water from the cooling system or condensation. |
| What is the dilution level of fuel of the test sample you create a by adding fuel to a sample of new oil.? | 5 percent. |
| If you are required to replace the oil pump, what must you do prior to replacing the pump? | Be sure the engine is cool. |
| What provides the oil pressure gauge with an electrical signal to allow you to read the oil pressure at which the engine is operating? | Oil pressure sending unit. |
| To replace an oil pressure switch, how do you prevent the generator from starting? | Disconnect the negative side of the battery. |
| What is usually constructed in a series of wooden slats, one above the other, set in at an angle? | Cooling towers. |
| What type of system allows the coolant’s boiling point to rise, allowing more effective cooling of the engine? | Pressurized system. |
| What type of system uses a radiator to cool the hot liquid as it leaves the engine and is the most common system you work with in the power production field? | Closed. |
| What type of system uses cooling water to collect the heat from the jacket water in the heat exchanger, which then flows through a cooling tower? | Combination. |
| What directs the air to the proper sections of an engine to gather heat and then directs it back into the atmosphere? | Special shrouding. |
| A thermostat operates using a theory of | expansion and contraction. |
| What causes the need to use a wire-reinforced hose in the cooling system to prevent the hose’s collapse? | High suction from the water pump. |
| What collects the heat from the coolant in a radiator to transfer it to the air? | Fins. |
| What uses an airtight fit onto the radiator and close tolerances with the cooling fan to prevent recirculation of the hot air into the radiator? | Fan shrouds. |
| What two factors determine whether the fan is suction or blowing? | Pitch of the blade and the direction that the fan spins. |
| What drives the fan on an air cooled engine either directly or through gears? | Crankshaft. |
| Where does coolant enter the engine to ensure there is always coolant in contact with all internal engine components? | Lower portion. |
| What causes coolant to recirculate the coolant back to the water pump to pass through the water jacket again? | Thermostat closing. |
| What allows coolant in the radiator core to cool for a longer period of time before it reenters the water jacket? | Thermostat opening. |
| At what pressures do most cooling systems operate? | 10 to 15 psi. |
| What opens a valve on the radiator cap, thus allowing coolant to move from the expansion tank to the radiator? | Vacuum. |
| What coolant additive is critical for summer time operations because it also raises the temperature at which water boils? | Ethylene glycol |
| What mixture of coolant provides protection to –60ºF? | 60 percent ethylene glycol to 40 percent water. |
| How do you add antifreeze to an engine while it is operating? | Mix it thoroughly with a small amount of water. |
| When do you look for any changes as you mix the solution to for diesel coolant additives (DCA)? | After each drop. |
| For what do you inspect the water pump impeller’s ceramic seal? | Chips, cracks, and rough conditions. |
| When you are inspecting a radiator, what must be straight and free of debris? | Fins. |
| Where do you check the tension of belts using the back of your hand and a ruler? | Midway between the pulleys. |
| What property of belts causes you to always replace belts as a set? | Stretch slightly over time. |
| What coolant heater is installed internally in the engine block in place of a freeze plug? | Immersion. |
| Into what engine component are glow plugs installed? | Intake manifolds. |
| What component do two stroke engines have that serves the same purpose as the intake manifold of four-stroke engines? | Air box. |
| How many lobes do the blowers most commonly used on today’s engines have on each rotor? | 3. |
| What type of blower is a turbocharger that is driven by the exhaust gases? | Centrifugal. |
| In what component might you see leaks because of the carbon-colored discoloration of parts or surfaces adjacent to the leak? | Exhaust manifold. |
| In what component can you often see a leak as dust or smoke blowing from the joint during startup to identify a leak? | Expansion joint. |
| What is a major factor in erosion in the exhaust silencer? | Contamination in the fuel oil. |
| What does supporting the entire weight of the muffler prevent, which eliminates premature failure? | Over stressing the expansion joint. |
| What is created by using gear reduction starters that use an internal gear to drive the pinion gear? | Increases the amount of torque at the flywheel. |
| What prevents damage to the starter motor during engine startup from overspeed conditions? | Overrun clutch. |
| What battery charger component decreases the input voltage to required output voltage to provide the battery with a charge? | Power transformer. |
| What battery charger component rectifies alternating current output of power transformer to direct current.? | Power diode. |
| What is the insulated wire of the coil, also called the field winding, wrapped around? | Soft iron core. |
| What component is the stationary conductor on the battery-charging alternator? | Stator. |
| What do we consider less fuel in the mixture to be? | Lean. |
| What part of the carburetor maintains a constant level of fuel in the bowl? | Float. |
| What is a restriction in the air passage of a carburetor? | Venturi. |
| When you are adjusting the idle speed on a carburetor, what are you adjusting by turning the screw in (clockwise)? | Increase the engine speed. |
| When you are adjusting the main jet by turning the adjusting needle out (counterclockwise), you are making the mixture | richer. |
| What fuel system component may be inside or outside the facility and should hold enough fuel to last for at least 72 hours of operation at full load? | Storage tank. |
| As the plunger of a mechanical injector moves up, what allows fuel to flow into the injector cup? | Opening the metering orifice. |
| What happens as the plunger moves downward in a mechanical injector? | Increasing the pressure of the fuel in the cup. |
| How high can the pressure be in a hydraulic fuel injector? | 5,000 psi. |
| What are the two most common types of multiple plunger inline fuel injection system? | Port and helix type and the sleeve type. |
| What determines the length of the effective stroke in a port and helix multiple plunger inline fuel injection system? | The position of helix in relation to the spillway. |
| What determines the amount of fuel delivered to the cylinder for combustion in a multiple plunger inline fuel injection system? | Effective stroke of the plunger. |
| As engine speed increases with a pressure timed (PT) fuel injection system, what does the increase in pressure and fuel and the shorter amount of time the injector opens determine? | How much fuel reaches the combustion chamber. |
| What type of distributor-type injection pump has a single-cylinder, opposed-plunger pump? | Roosa Master. |
| What type of distributor-type injection pump contains a cylinder and plunger? | AMBAC. |
| In a Roosa Master type of distributor-type injection pump, what do the pistons follow to pressurize the fuel? | Cam ring. |
| When you are timing an inline plunger fuel injection pump, at what position do you place the engine’s number one cylinder? | TDC of the compression stroke. |
| Which fuel injection system does not require timing since it is simply a medium pressure transfer pump? | Cummins pressure timed (PT) fuel system. |
| Which fuel system uses timing marks on the control rack that you must align with the marks on the internal gear that the plunger slides through for timing the system? | Unit fuel injection system. |
| What happens if you undertighten the strainer when you install it? | Allows particles to get through the strainer. |
| What fuel system component can cause the cylinder head valve seats to be warped if you overtighten the clamp studs? | Injector. |
| To where do the flyweights move as the engine speed increases causing the centrifugal force to become greater than the spring tension? | Outward. |
| What hydraulic governor system component controls the movement of the hydraulic fluid to control the governor operation? | Pilot valve plunger. |
| What hydraulic governor system component floats in a cylinder with a linkage rod connected to it? | Power piston. |
| Where can you usually find the droop control on a PSG hydraulic governor? | Back side of the governor out of the line of sight. |
| What portion of the governor prevents overcorrection of speed changes? | Compensation. |
| What electronic governor component uses a back and forth movement of a magnetic field to induce alternating current (AC) voltage in the coil? | Magnetic pickup (MPU). |
| What opposes the movement of the plunger in an electro-hydraulic actuator pushing it away from the coil? | Spring. |
| When you are making adjustments to the magnetic pickup, what is the maximum that you turn it in at any time? | 1/8 turn. |
| What electronic governor adjustment sets the sensitivity of the module? | Gain. |
| What electronic governor adjustment sets the normal operating speed of the engine? | Running speed. |
Created by:
rentedred
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