Câu 1: What part moves up and down creating power ?
Piston
Câu 2: The major difference in Two stroke and Four stroke engines is ?
Number of strokes to complete a power cycle
Câu 3: Engine displacement is the measure of ?
How much air all the pistons can move in a singular stroke
Câu 4: Of the two valves inside the engine, which one is bigger ?
Intake
Câu 5: The motion of the cam is transferred to the valves through ?
Rocker arms
Câu 6: If the engine coolant leaks into the engine oil, then engine oil ?
Appears milky
Câu 7: The oil pump is driven by the ?
Crankshaft directly
Câu 8: What is the order of operation of a 4 stroke engine ?
Intake, Compression, Power, Exhaust
Câu 9: Fills the area of the engine called the Cylinder ?
Piston
Câu 10: The size of the engine intake valve is ?
Larger than that of exhaust valve
Câu 11: The device used to measure the clearance between the valve and tappet of an IC Engine is ?
Feeler gauge
Câu 12: By which relation speed of piston can be calculated inside cylinder block (L-Length of stoke, D-Diameter, N-speed of engine) ?
2LN
Câu 13: The vehicle ride will be comfortable if ?
Unsprung mass is kept minimum
Câu 14: The effect of having excess camber is ?
Uneven tyre wear
Câu 15: If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about ?
10:1
Câu 16: The co-efficient of rolling resistance for a truck weighing 63 500 N is 0.018. The rolling resistance to the truck is ?
1143 N
Câu 17: For idling condition in automotive engines, the air-fuel mixture must be ?
Rich
Câu 18: For cruising condition in automotive engines, the air-fuel mixture must be ?
Lean
Câu 19: For high power condition in automotive engines, the air-fuel mixture must be ?
Rich
Câu 20: To prevent overheating of exhaust valve and the area near it, the air-fuel mixture must be ?
Rich
Câu 21: ____________ is the method of governing used in petrol engine ?
Quality governing
Câu 22: What is the purpose of this tool ?
To remove oil filter from the engine
Câu 23: What tool are use when tighten cylinder head bolt ?
Torque Wrench
Câu 24: What is the last stoke in the 4-stroke cycle engine ?
Exhaust stroke
Câu 25: Which system use this component ?
Exhaust System
Câu 26: Heat engines burn a ________ to create heat which is then used to do work ?
Fuel
Câu 27: The pistons of IC engines are usually made of ______________?
Aluminium alloy
Câu 28: The ___________ is called the backbone of an engine ?
Crankshaft
Câu 29: The major function of the camshaft is to operate the ___________ valves ?
Inlet and exhaust valves
Câu 30: The piston _____ in the cylinder bore to evacuate the combustion chamber ?
Moves downward
Câu 31: A petrol engine, whether four- or two-stroke, is called a _____ ?
Spark Ignition engine
Câu 32: There are two methods by which fuel is injected into a combustion chamber, they are _____?
Direct or indirect injection.
Câu 33: Spark plug are mounted inside ________?
Crank case
Câu 34: Which of the following provides passages for flow of cooling water ?
Cylinder head
Câu 35: What transfers motion from the camshaft to the push rod in an OHV engine ?
Lifter
Câu 36: This component can also be used to help balance the engine ?
Flywheel
Câu 37: Improved fuel economy can be acheived with ?
A dual mass flywheel
Câu 38: What Recharges the battery while your car is running ?
Alternator
Câu 39: What Makes The Engine Turn ?
Starter
Câu 40: How does oil affect your engine ?
B & C
Câu 41: What kind of engine do we use the most nowadays ?
Internal Combustion Engine
Câu 42: What is meant by gear ratio ?
The ratio of number of teeth on pinion and number of teeth on gear
Câu 43: In a single dry plate clutch, torsional vibrations are absorbed by ?
Coil springs known as torsional springs
Câu 44: What are the three main types of gear teeth ?
Spur, Double Helical and Helical
Câu 45: What is a typical gear oil ?
EP80
Câu 46: Gear oil rated EP stands for ?
Extreme pressure
Câu 47: The forth gear ratio is likely to be ?
1:1
Câu 48: How many shafts are typically in a rear wheel drive gear box ?
3
Câu 49: What are the shafts found in a rear wheel drive gear box ?
Lay shaft, main shaft, input shaft
Câu 50: which gear uses straight cut gears ?
Reverse
Câu 51: What are these components ?
Baulking/Syncro rings
Câu 52: What is the function of the interlock mechanism ?
To ensure that only one gear at a time can be engaged
Câu 53: If torque increases:
Speed reduces
Câu 54: When a higher gear is engaged:
Less torque is required
Câu 55: This type of gear arrangement is known as a ?
Compound gear train
Câu 56: Input shaft can also be termed as:
First motion shaft or Primary drive shaft
Câu 57: Clutch vibration can be caused by ?
All of them
Câu 58: This is another name for a throw out bearing ?
Release bearing
Câu 59: Clutch Chatter and a worn crankshaft Thrust bearing can be caused by ?
Excessive crankshaft end play
Câu 60: The purpose of transmission in an automobile is ?
To vary the torque at the wheels
Câu 61: Identify the transmission layout for the vehicle shown in the image ?
Four wheel drive
Câu 62: What is an advantage of a spur gear over a helical gear ?
It is more efficient
Câu 63: What is the purpose of a transmission ?
It allows you to idle,control torque and speed output and change direction
Câu 64: What is the purpose of the differential ?
To allow driven wheels on the same axle to rotate at different rates
Câu 65: Which of the following symptom is caused as a result of brake disc run out ?
Judder during braking
Câu 66: A clutch is usually designed to transmit maximum torque which is ?
150 per cent of the maximum engine torque
Câu 67: What type of bearing is used for main bearings and connecting rod bearings ?
Plain bearings
Câu 68: The torque available at the contact between driving wheels and road is known as ?
Tractive effort
Câu 69: A traction control system (TCS) in automobiles controls the ?
Torque that is transmitted by the tyres to the road surface
Câu 70: Which one is NOT the components of Automatic Transmission ?
Syncronizer Ring
Câu 71: Which type of gear causes the most amount of noise ?
Spur gear
Câu 72: On a rear wheel drive vehicle the differential allows ?
Allows drive to be moved through a 90 degree angle
Câu 73: What do we call the gear connected to the input power source, such as a motor ?
Driving Gear
Câu 74: A clutch is usually designed to transmit maximum torque which is ?
150 per cent of the maximum engine torque
Câu 75: Driveline component that connects a drive shaft to a transmission output shaft and allows back and forth drive shaft movement in response to road conditions ?
Slip joint
Câu 76: A bearing used to mount and support a two-piece Hotchkiss drive shaft ?
Center support bearing
Câu 77: Definition: Type of universal joint that has bearing-capped yokes at right angles to each other, forming a cross shape when each shaft end is connected:
Cardan universal joint
Câu 78: Definition: Small metal weight frequently welded to a drive shaft to smooth operation and reduce vibration:
Drive shaft balancing weight
Câu 79: Definition: Term for the components and parts that transfer engine power from a vehicle transmission to its drive wheels:
Driveline
Câu 80: Definition: A flexible joint that permits changes in driving angles between a driving and driven shaft. It is nicknamed a U-joint:
Universal joint
Câu 81: Definition: A flexible joint that permits changes in driving angles between a driving and driven shaft. It is nicknamed a U-joint:
U-joint
Câu 82: The majority of car clutches have what sort of springs ?
Diaphragm or Coil
Câu 83: When calculating gear ratios in a simple gear train, which is the correct formula ?
Driven divided by Driver
Câu 84: Which of the following is not part of a car transmission ?
Semi Shaft
Câu 85: The mass (weight) of a vehicle is suspended by ?
Springs
Câu 86: Why do you need to keep proper oil levels in your car ?
to ensure the all internal engine parts lubricating
Câu 87: Which one is Turbocharger System component ?
Intercooler
Câu 88: What will happen if there is no cooling in an engine ?
Pistons swell and rotating assembly seize
Câu 89: On standard car and truck engine what type of cooling is used ?
Liquid cooling
Câu 90: Air cooled engines use what for cooling ?
Fins on the block
Câu 91: In a liquid cooling system they use what ?
Coolant
Câu 92: Engine coolant consists of ________?
Water and antifreeze
Câu 93: What component takes the heat from the engine and warms the interior of the vehicle ?
Heater Core
Câu 94: The _____________ controls the temperature of the engine using a wax pellet submerged in the engine coolant ?
Thermostat
Câu 95: Coolant flows into the engine, from the Radiator through this hose ?
Lower radiator hose
Câu 96: What is the common name for the device that forces coolant to circulate through the cooling system ?
Water Pump
Câu 97: The typical temperature of an engine cooling system that is operating properly is about _____ degrees ?
180-210 degrees Fahrenheit
Câu 98: A common color for new coolant could be _________?
Orange
Câu 99: The typical cooling system pressure is between ___________?
15 and 18 PSI
Câu 100: This is the heart of the A/C system. Driven by the serpentine belt, it pressurizes the refrigerant that cools the air. It also senses temperature changes ?
Compressor
Câu 101: Like a miniature radiator that is usually found in front of the actual radiator, it turns hot refrigerant gas into a condensed cooler refrigerant liquid ?
Condenser
Câu 102: Also called the Orifice Tube, its job is to constantly monitor the pressure and temperature of the A/C system to determine the exact amount of refrigerant that can safely enter the evaporator ?
Thermal Expansion Valve
Câu 103: The most important property of the lubricant is ?
Viscosity
Câu 104: The maximum pressure in the lubrication system is controlled by ?
Valve relief
Câu 105: The lubricants commonly used in the automobiles are ?
Synthetic oils
Câu 106: Mist lubrication system is mainly used in ?
Two-stroke petrol engine
Câu 107: Most commonly used lubrication system in automobiles is the ?
Pressure system
Câu 108: ____________ is the property of lubricating oil due to which the oil particles stick with the metal surfaces ?
Adhesiveness
Câu 109: Lubricating oil ?
All of these
Câu 110: The lubricant in internal combustion is exposed to ?
High temperature
Câu 111: Which one of the following is NOT the property of a good lubricant ?
Becomes thicker after prolonged use
Câu 112: The friction is needed to be reduced because ?
It will be reducing the excess heat generation
Câu 113: Which of the following is considered a common multi-viscosity engine oil ?
5W-30
Câu 114: What type of oil results in low levels of impurities, increases lubricating abilities, reduces sludge from forming, and protects at extremely high temperatures ?
Synthetic
Câu 115: When checking hose conditions, which would indicate the need for replacement ?
All of these
Câu 116: All of these fluids can be checked with the engine off except ?
Transmission fluid
Câu 117: Engine coolant consists of ________?
Water and antifreeze
Câu 118: As the temperature of oil increases ________?
Its viscosity decreases and it flows more readily
Câu 119: What is engine oil's primary job ?
To lubricate
Câu 120: What automobile system is shown in the graphic below ?
Fuel system
Câu 121: Fuel pump is ?
A device that moves fuel from the tank to the engine
Câu 122: a screen that removes dirt and rust from the fuel system is ?
Fuel filter
Câu 123: What is carburetor ?
Mixes fuel and air and supplies it to the engine
Câu 124: The cold air collection box contains ?
The air filter
Câu 125: Fuel line is ?
A tube that is used to deliver fuel from the fuel tank to the engine
Câu 126: With …..……. fuel is sent directly into the cylinder ?
Gasoline direct injection
Câu 127: Parts of an automobile fuel system are ?
the filters, the pump, the fuel tank and carburetors
Câu 128: Which part of the fuel system removes impurities from fuel ?
Fuel filter
Câu 129: Fuels need what to burn ?
Oxygen
Câu 130: Fuels are mainly composed of ?
Hydrocarbons
Câu 131: Fossil Fuels formed over long periods of time after particles in water settled to the sea floor and formed marine mud. What kinds of particles needed to be present in the marine mud in order for fossil fuels to form ?
Mostly decaying organisms
Câu 132: Coal, oil and gas are examples of ?
Fossil fuels
Câu 133: Which of the following is NOT a gas that contributes to acid rain ?
H2
Câu 134: Which of the following gases, released by animals as a waste product of digestion, can add to global warming ?
Methane
Câu 135: Fuels formed from decaying remains of plants and animals that lived millions of years go ?
Sources of energy that do not come from fossil fuels
Câu 136: Fossil fuels are classified as nonrenewable because they________ ?
Take millions of years to replace
Câu 137: What is number 1 pointing to ?
Air
Câu 138: What is number 2 pointing to ?
Choke
Câu 139: What is number 5 pointing to ?
throttle
Câu 140: Why is gasoline actually not that great of a fuel ?
High knocking index and low octane levels
Câu 141: Why do Hydroxyls burn more efficiently than hydrocarbons ?
They contain more oxygen
Câu 142: Why do we add ethanol to our gasoline ?
Helps reduce the knocking index and burn more efficiently
Câu 143: In what part of the carburetor does the Venturi effect happen in ?
The throat
Câu 144: In what part of the carburetor does Bernoulli's principle happen ?
The emulsion tube
Câu 145: What does the high speed or emulsion tube air bleed do ?
Bring air into the emulsion tube
Câu 146: What side of the carburetor are the air bleeds found on ?
Choke Side
Câu 147: What does the bowl vent do ?
Bring air into the fuel bowl to maintain atmospheric pressure
Câu 148: On many types of engines, what measures the volume (quantity) and mass (density) of the air entering the engine ?
Mass Airflow Sensor
Câu 149: At full speed what positions are the choke and throttle in ?
Choke open, throttle open
Câu 150: Which part is responsible for igniting the air-fuel mixture in gasoline engines ?
Spark Plug
Câu 151: It is responsible for holding most of the gas in the fuel system ?
Fuel Tank
Câu 152: From the fuel tank, it sends fuel up the fuel line and into the fuel rail where it can be injected into a cylinder ?
Fuel Pump
Câu 153: It contains jets that will push the gas into the combustion chambers ?
Carburetor
Câu 154: Which of the following substances not required for combustion ?
Carbon Dioxide
Câu 155: What part of a car holds the electricity ?
Battery
Câu 156: The battery is made of lead, water and……… ?
Sulfuric acid
Câu 157: What part connects the engine to the alternator to make it turn when the engine turns ?
V-belt
Câu 158: What part keeps the battery from charging too much ?
The voltage regulator
Câu 159: Where does the current go when the key is turned ?
To the Starter
Câu 160: How many volts should a fully charged automotive battery produce ?
12.5 – 12.6
Câu 161: What type of current does a car battery produce ?
Direct Current
Câu 162: How many volts should a properly operating charging system produce ?
13.5 - 15
Câu 163: Which component produces the electricity to charge the battery ?
The Alternator
Câu 164: What part of the electrical system keeps the battery charged ?
The alternator
Câu 165: What is the negative side of the battery connected to ?
Ground
Câu 166: How are the positive and negative battery terminals color coded ?
Red on Positive, Black on Negative
Câu 167: In an electrical circuit, what would be considered the load ?
Light bulb, motor, coil...
Câu 168: How do car manufacturers save money and space in their electrical circuits ?
By using ground as part of the circuit
Câu 169: Which component uses the most amperage in a vehicle ?
Starter
Câu 170: When connecting jumper cables to start a car with a dead battery___________?
Always make the final connection to ground
Câu 171: Most car batteries contain sulfuric acid, which is________?
Flammable and corrosive
Câu 172: What determines the amperage used in a circuit ?
The draw of the load
Câu 173: The charging system in a vehicle_________ ?
Only works when the engine is running
Câu 174: Vehicle charging systems require the car to be plugged in while the car is not in use ?
False
Câu 175: Fuses in an electrical circuit prevent ?
Amperage overload
Câu 176: When electrical resistance increases, amperage:
Decreases
Câu 177: When the current to a solenoid or relay is disconnected the magnetic field collapses and causes:
A voltage spike
Câu 178: The function of an alternator in an automobile is to ?
Continually recharge the battery
Câu 179: Which of the following isn’t considered while deciding the optimum firing order of the engine ?
Engine configuration
Câu 180: Why is the Dwell meter used ?
To set the contact breaker gap
Câu 181: On which condition does the vacuum advance mechanism shift the ignition point ?
Under part-load operation
Câu 182: The conventional direction of electric field is ________ ?
Positive to negative
Câu 183: Electric field originates at __________?
Positive charge
Câu 184: Electric field terminates at ________ ?
Negative charge
Câu 185: Which among the following statements is true with regard to electric field lines ?
Electric field lines never intersect
Câu 186: Diesel fuel, compared to petrol is ?
More difficult to ignite
Câu 187: If the battery doesn't hold the ________ there could be problems in the __________ ?
Charge-charging system
Câu 188: It serves as a step-up transformer because it raises the 12 volts battery voltage to thousands of volts ?
Ignition coil
Câu 189: It's a conductor component that distributes the output from the coil to the spark plug according to the firing order ?
Rotor
Câu 190: It provides a source of energy to supply current to the ignition primary circuit for initial starting purposes ?
Battery
Câu 191: It controls the current flow to the coil during normal operation ?
Ballast resistor
Câu 192: It serves as a step-up transformer, which raises the nominal battery voltage of 12 volts up to the many thousands of volts ?
Ignition coil
Câu 193: It is used to close or open the primary circuit ?
Breaker point
Câu 194: It is used to reduce the amount of arcing when the points open the primary circuit ?
Condenser
Câu 195: It is used to distribute the surges of high voltage available to the coil tower ?
Rotor
Câu 196: It is a system that delivers spark on the combustion chamber ?
Ignition system
Câu 197: What is Suspension System ?
Ensures the optimal riding comfort and controllability
Câu 198: What is Spring ?
Is the core component of all suspension systems
Câu 199: Springs carry the _________ that is applied to the vehicle and also impact forces when traversing uneven terrain ?
Load
Câu 200: Which Spring does not belong to the Suspension System ?
Water flush
Câu 201: Coil Springs are_________?
The store of energy more than twice per unit volume
Câu 202: The air spring can store the most energy than other ________, these springs allow for automatic load-leveling of the vehicle ?
Springs
Câu 203: Torsion Bars act as______?
The connection between rotational end to the control arm
Câu 204: The shaft of the suspension system to which the tires and wheels are attached ; they are used to drive and support the wheels ?
Axle
Câu 205: A system within a vehicle designed to isolate the vehicle body from road bumps and vibrations ?
Suspension System
Câu 206: The angle formed through the wheel pivot points when viewed from the side in comparison to a vertical line through the wheel ?
Caster
Câu 207: # The movement of a vehicle around its z-axis (vertical axis) felt when the vehicle deviates from its straight path, as when skidding sideways, and the rear comes around ?
Yaw
Câu 208: The ability to deform and reform into the same shape ?
Elasticity
Câu 209: The suspension system performs all of the following functions EXCEPT:
Monitoring the tread wear of each tire
Câu 210: ________ are swivel connections mounted in the outer ends of the control arms ?
Ball joints
Câu 211: ________ dampen spring oscillations by forcing oil through small holes in a piston ?
Shock absorbers
Câu 212: All of the following about the flexible joints often found in the steering linkage are true, EXCEPT ?
They can be disassembled, cleaned, and repacked with grease
Câu 213: Some shock absorbers ?
Use pressurized nitrogen gas to reduce aeration of the hydraulic fluid
Câu 214: What is the purpose of Brake ?
All of these
Câu 215: Which of the following is not part of the disc brake system ?
Brake Shoe
Câu 216: What does the acronym ABS stand for ?
Anti-lock Braking System
Câu 217: Hydraulics uses what as its non-compressible medium ?
Oil
Câu 218: Which of the following is not a brake drum component ?
Pads
Câu 219: What automobile system is shown in the graphic below ?
Braking system
Câu 220: The advantage of a tubeless tyre over tube type tyre is ?
All of these
Câu 221: What is the purpose of the braking system ?
The braking system is designed to decrease the speed of the vehicle
Câu 222: Why were drum brakes used originally ?
They could be mechanically operated
Câu 223: Drum brakes have another advantage that has seen them stay in use despite the advancement of disc brakes ?
The self servo action makes them very good for Handbrake applications
Câu 224: Despite the universal acceptance of Disc brakes they do have draw backs ?
They are heavier and more expensive than drums
Câu 225: Which component is responsible for for pulling the brake pad away from the disc after the driver releases the pedal ?
The seal around the piston
Câu 226: What does 'hydraulics' mean ?
Operated by a liquid
Câu 227: Which wheels does the handbrake normally operate on ?
The rear wheels only
Câu 228: What are the two types of steering systems we talked about ?
Rack and Pinion
Câu 229: _______ allows a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive vehicles ?
CV Axle
Câu 230: A customer complains about a shimmy in the steering wheel whenever he/she hits a bump. This is mostly likely caused by:
Failed steering damper
Câu 231: Hard steering can be caused by which of the following ?
All of these
Câu 232: An automotive battery has how many cells ?
Six
Câu 233: Petrol that detonates easily is called ?
Low Octane petrol
Câu 234: Leak Check Test and Gas Calibration are required every _____________hours ?
72
Câu 235: What is the purpose of the EGR valve ?
Reduce NOX production
Câu 236: What two elements combine to form NOx (Nitrogen Oxide) ?
Nitrogen and Oxygen
Câu 237: This is the first part of the exhaust system, what is it called ?
Condition, leaks, noise, security
Câu 238: What is the name of this component fitted within the exhaust reduce the amount of toxic emissions from the car ?
Catalytic converter
Câu 239: What are the bad gasses produced by the engine ?
Oxides of Nitrogen, Carbon monoxide, Hydrocarbons
Câu 240: Which of the following statements is not correct with respect to alcohols as alternate fuel ?
Anti-knock characteristics of alcohol are poor
Câu 241: Why a small amount of gasoline is added to alcohol ?
To improve cold-weather starting
Câu 242: What is a dual fuel engine ?
The engine which uses gaseous and liquid fuel
Câu 243: Which of the following has the same combustion as HCCI (Homogeneous Charge Compression Ignition) engine ?
Hybrid of both SI and CI engine
Câu 244: Which of the following is true for the HCCI engine ?
Pre-catalyst hydrocarbon emissions are higher
Câu 245: For which of the following engine lean-burn concept is ideal ?
SI engine
Câu 246: By which technique can the charge stratification be achieved ?
Injection as well as carburation
Câu 247: Which of the following is true for stratified charge engine ?
Multi-fuel capabilities
Câu 248: What is true about the Wankel engine ?
It has a longer operating cycle
Câu 249: Where is the variable compression ratio used ?
SI engine
Câu 250: Which of the following is true for stratified charge engine ?
It has multi-fuel capabilities
Câu 251: Which of the following is true about the Stirling engine ?
High efficiency, quiet operation and compatible with renewable energy
Câu 252: Which of the following is one of the major exhaust emissions from CI engines compared to SI engines ?
Particulates
Câu 253: Which of the following causes the photochemical smog ?
NOx and HC
Câu 254: What does the blue smoke in diesel engine indicate ?
Unburnt oil
Câu 255: During which condition of the vehicle does NOx emission in SI engine will be lowest ?
Idling
Câu 256: For what purpose is the Rhodium used ?
To reduce NOx
Câu 257: Why is the fumigation technique used ?
To control smoke
Câu 258: Why are lead compounds added in petrol ?
Reduce knocking
Câu 259: Which of the following cannot be reduced by thermal converters ?
NOx
Câu 260: What can be reduced by using exhaust gas recirculation (EGR) effectively ?
NOx
