What should be used, inter alia, the tachometer indications?

primarily to control the optimal turnover during acceleration

for continuous speed control while driving with a steady motion

primarily for the analysis of rotational speed values when reducing gears

Is the tachometer an important control and measurement device in a truck?

yes - regardless of the driver's experience

no, it has little practical application

yes, if the driver does not have a lot of experience in driving a truck

What is the driver obliged to do to reduce the nuisance of the vehicle's impact on the environment?

adherence to the vehicle owner's manual

for switching off the engine of the vehicle on descents

What is the driver obliged to do to reduce the nuisance of the vehicle's impact on the environment?

response to the occurrence of leaks of operating fluids from the vehicle

avoid using the driver's compartment air conditioning

What is primarily influenced by the torque characteristics?

on the vehicle's ability to accelerate within a certain range of engine speed

the value of the maximum speed achievable by the vehicle

on the load capacity of the vehicle

What is useful, among others, the operating characteristics of the drive unit?

for the optimal selection of the gear ratio

to measure the amount of instantaneous fuel consumption

if the driver is experienced, technical characteristics are of secondary importance

What is the characteristic of specific fuel consumption informing about?

about the operating conditions of the engine, in which it works with the best efficiency

about the dynamic indicator of the vehicle

about fuel consumption at constant speed

Does the high flexibility of the engine affect the vehicle's acceleration ability?

it increases the vehicle's acceleration ability

it reduces the vehicle's acceleration ability

Does a higher number of gear ratios result in higher fuel consumption?

always conducive to increased fuel consumption

Does a heavy vehicle load affect the truck's acceleration ability?

reduces the acceleration capacity of the truck

increases the truck's acceleration ability

has such an effect, but only on mountain roads

What can be affected by increasing the load on the truck?

may cause a change in the behavior of the vehicle

it has no effect if the load is properly distributed and secured

reduces fuel consumption when the load is placed over the driving axle

Could a heavy truck load have an effect on the truck's stopping distance?

can increase the braking distance

has no effect if the braking system is functioning properly

no, because a modern electronically controlled air braking system stops the vehicle in the same distance - regardless of the load

Does a heavy load on the car affect its hill-climbing ability?

yes, because the climbing ability is reduced

has no effect if the driver selects a suitably low gear in advance and then climbs the hill without shifting.

has no effect if the torque of the drive unit is high

Does road configuration (multiple curves, slopes) affect fuel consumption?

reduces fuel consumption if the driver changes gears frequently

Does frequent stronger braking affect the operational fuel consumption?

can significantly increase fuel consumption

significantly reduces fuel consumption and improves the efficiency of the pneumatic braking system

Does sudden braking affect driving safety?

yes, as it may endanger the safety of the cargo being transported

no, because the driver only brakes abruptly in an emergency

How does rapid acceleration affect driving safety?

large if taking place on slippery ground

minor if the vehicle is equipped with ASR / TCS

Does an electronically controlled air brake always prevent skidding of a truck, semi-trailer, or trailer / bus with two axles or articulated bus?

no, this system stabilizes tandem’s stability during braking

yes, this system is responsible for the stability of the tandem during braking and also prevents skidding

yes, except when driving on slippery surfaces

Does too little tire pressure on only one axle affect fuel consumption?

yes, it increases fuel consumption

yes, but it is not a noticeable quantity

yes, as long as the pressure drop occurs on the axle with twin tires

How can I obtain favorable fuel consumption when driving at a constant speed in mountainous terrain?

properly select the gear ratio in relation to the speed and optimally use the system of maintaining constant speed during descent

brake only with retarders when going downhill

Does the road configuration (flat terrain, few bends) affect fuel consumption?

can help to reduce fuel consumption

has no effect - fuel consumption depends on driving style and engine parameters

can increase fuel consumption regardless of driving technique

When is the optimum fuel consumption for a truck?

when the RPM indicator is in the green area during acceleration

when the engine speed is between 800 - 1000 rpm. when accelerating

when used while accelerating high engine revs

What parameter is important when the truck goes up?

high maximum speed obtained in advance

When should a truck driver shift up or down a gear?

optimum gear shifting is always based on driving speed, vehicle load and road conditions

shift gears as often as possible in all situations

you should change the gears as little as possible

What is the optimal engine speed to maintain when driving your truck on a highway?

as low as possible when driving at a constant speed in the highest possible gear

When is the fuel consumption of a truck with a trailer the lowest?

while moving at a constant speed

when driving dynamic, with full use of engine parameters

when driving uphill with a full load

When is the specific fuel consumption low in relation to the developing power?

with the engine running at a speed close to the highest torque

when the engine reaches its maximum power value

when the engine is at least 60% of its maximum power

Is very early gear shifting at low revs when accelerating with a laden truck (bus with a heavy load of passengers and luggage) correct?

no, because this way of driving does not allow to use the optimal operating ranges of the drive unit

yes, because low fuel consumption is this achieved

yes, because that's what eco driving is all about

Should the truck / bus driver take the torque characteristics into account when operating an internal combustion engine?

yes, this parameter is very important for the correct operation of the engine

no, as this parameter only applies to the designer of internal combustion engines

no, because this parameter does not affect the way the engine is operated

What is the ESP system in a truck / bus?

vehicle track stabilization system

the electronic synchronization of the pneumatic braking system

What does the green box marked on the tachometer inform the truck / bus driver about?

about the optimum operating range of the drive unit, especially during acceleration

about the fact that when driving with a steady motion (at a constant speed), the pointer of the tachometer should always be in this field

that the tachometer needle must under no circumstances go beyond this range during acceleration

Can the power of the drive unit be affected by the truck's climbing ability?

no, only the torque is responsible for that

no, it is only the flexibility of the engine that is responsible for that

What should a truck driver consider if he intends to shift to a higher gear?

characteristics of the engine torque

mainly my own preferences and my own experience in driving a truck

mainly the type of road on which the movement takes place

Which component should the truck driver adjust the gear to?

primarily for the driving situation, regardless of speed

From the perspective of road safety, is it more advantageous to shift to a higher gear very early or slightly later?

the described activity in no way affects road safety

What can the tachometer be used for in a truck, bus?

for selecting the optimal speed for the operation of the engine brake

to check that the truck does not exceed 1300 rpm when accelerating

it is an unnecessary device for an experienced driver

What brakes are called continuous action brakes?

only alternative brakes (retarders)

only secondary braking device (emergency) brakes

What does the green box on the tachometer of a truck / bus mean?

range of optimal speed for acceleration

the range of optimal operation of the engine brake

What does the green box on the tachometer of a truck / bus mean?

optimal RPM range for acceleration

the optimal range of engine operation both during acceleration and driving at a constant speed

the range of optimal engine operation

What does the blue box marked on the tachometer mean for some truck / bus manufacturers?

the field of highest efficiency (full power) of the engine brake

the field of non-economic operation of the engine

the field of optimal operation of the turbocharger with variable geometry

Code95 - chapter 1

Authored by Przemyslaw Sekieta

Professional Development

Used 2+ times

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62 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When is the engine reaching its maximum power?

at optimal fuel consumption

at optimal engine exhaust emissions

at maximum usable speed

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a motor vehicle obtains an economical fuel consumption?

when driving with full load

when driving at constant speed without load

during dynamic acceleration, with full use of the parameters of the drive unit

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What can excessive fuel consumption be related to, among other things?

incorrect driving technique

long-term use of retarder on long descents

using a high torque during acceleration

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What can excessive fuel consumption be related to?

failure of the injection system

the use of retarder on flat areas

the occurrence of a vehicle differential lock

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What influences excessive fuel consumption?

overloading the engine during dynamic acceleration by shifting gears too quickly

using the retarder on descents

replacement of friction elements of the brake system

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What can increase fuel consumption?

using the retarder on descents

early shifting gears during dynamic acceleration

the use of a high torque range during dynamic acceleration

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the use of a tachometer?

listening to the engine sound

by constantly comparing the readings of the tachometer and other indicators

observation of indications when it does not reduce the safety of driving the vehicle

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Code95 - chapter 1

When is the engine reaching its maximum power?

When a motor vehicle obtains an economical fuel consumption?

What can excessive fuel consumption be related to, among other things?

What can excessive fuel consumption be related to?

What influences excessive fuel consumption?

What can increase fuel consumption?

What is the use of a tachometer?

What should be used, inter alia, the tachometer indications?

Is the tachometer an important control and measurement device in a truck?

What is the reason for the reduction of noise emitted by the vehicle?

Access all questions and much more by creating a free account

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