Take Austria BKF D95 Practice Questions - Austria Berufskraftfahrer Grundqualifikation D95 Bus (Bus Driver Initial Qualification) Exam

QUESTION 1 / 25

What is the primary physical cause of passenger discomfort known as 'jerk' (Ruck) during bus acceleration or braking?

Choose one answer below.

AThe rapid rate of change of acceleration over time (da/dt), which prevents passengers from adjusting their balance muscularly✓BA constant high velocity maintained along straight highway sections✓CThe steady, linear deceleration produced by an aerodynamically shaped bus body✓DThe continuous baseline rolling resistance generated by dual rear tires✓

QUESTION 2 / 25

Which braking technique must a bus driver apply to prevent the harsh rebound jerk (Ausfedern) of the vehicle chassis just before coming to a complete stop?

Choose one answer below.

AMaintaining maximum brake pedal pressure continuously until the vehicle completely stops rolling✓BApplying degressive braking by progressively releasing brake pedal pressure just before vehicle standstill✓CEngaging the parking handbrake at 10 km/h to assist the service brakes✓DSwitching the retarder to its highest stage immediately before stopping✓

QUESTION 3 / 25

Why is the use of high-stage manual retarder braking dangerous when operating a bus on wet, slippery, or snow-covered roads?

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AThe retarder applies braking torque exclusively to the front steering axle, causing loss of directional control✓BThe retarder acts solely on the drive axle and can induce drive-wheel slip or jackknifing without illuminating the brake lights✓CThe retarder overheats the service brake drums and disables the pneumatic air compressor✓DThe retarder rapidly drains the vehicle 24V auxiliary battery bank✓

QUESTION 4 / 25

How does a hydrodynamic retarder (e.g., Voith retarder) dissipate kinetic energy during continuous downhill descent in an Austrian Alpine pass?

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ABy compressing intake air inside the engine cylinders via variable valve timing✓BBy circulating oil between a rotating rotor and a stationary stator, converting kinetic energy into heat absorbed by the engine cooling circuit✓CBy creating eddy currents in copper-lined steel discs cooled exclusively by ambient ram air✓DBy generating electricity that is stored in auxiliary high-voltage capacitor banks✓

QUESTION 5 / 25

What is the primary function of the Electronic Controlled Air Suspension (ECAS) 'kneeling' (Absenkung) feature on low-floor urban and intercity buses?

Choose one answer below.

ATo increase ground clearance when driving over railway crossings and speed bumps✓BTo lower the entrance side of the bus body by several centimeters to facilitate boarding for elderly passengers and PRMs✓CTo deflate the front axle bellows completely during high-speed motorway cruising to reduce drag✓DTo tilt the bus body away from the curb to prevent luggage scratching the exterior panels✓

QUESTION 6 / 25

How does the ECAS system react automatically when a large group of 40 passengers boards a touring coach through the rear door?

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AIt locks the suspension at a rigid mechanical stop until the bus reaches 30 km/h✓BLevel sensors detect chassis deflection and the electronic control unit commands valves to pump additional compressed air into the rear bellows, maintaining nominal ride height✓CIt discharges air from the front suspension to equalize tire pressure across all axles✓DIt disables the engine throttle until the driver manually recalibrates the load distribution switch✓

QUESTION 7 / 25

Under Austrian passenger transport guidelines, what is the recommended cabin temperature setting for a touring coach during winter long-distance operations?

Choose one answer below.

A14°C to 16°C to ensure passengers stay alert and awake✓B20°C to 22°C with draft-free, balanced airflow across all passenger seating zones✓C26°C to 28°C to rapidly dry wet winter coats and boots✓D30°C in the front saloon and unheated in the rear underfloor area✓

QUESTION 8 / 25

What safety precaution must a bus driver observe when operating the fuel-fired auxiliary water heater (Zusatzheizung / Standheizung)?

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AThe heater must be switched off before refueling at petrol stations and when inside enclosed garage bays✓BThe heater must only be activated while the bus is traveling above 60 km/h on motorways✓CThe heater must be operated exclusively with pure ethanol additives✓DThe coolant temperature must be dumped onto the roadway every 2 operating hours✓

QUESTION 9 / 25

A 12-meter coach is negotiating a highway exit roundabout with a radius of 25 meters. If the driver increases speed from 20 km/h (5.56 m/s) to 40 km/h (11.11 m/s), how does the lateral acceleration (ay = v²/R) acting on seated and standing passengers change?

Choose one answer below.

ALateral acceleration remains identical because vehicle mass is unchanged✓BLateral acceleration doubles from 1.24 m/s² to 2.48 m/s²✓CLateral acceleration quadruples from 1.24 m/s² to 4.94 m/s², drastically increasing rollover and passenger fall risk✓DLateral acceleration drops to zero due to electronic stability control (ESP) intervention✓

QUESTION 10 / 25

When descending a steep 8% gradient on the Austrian Tauern Autobahn (A10), what is the correct operational strategy for managing the continuous retarder and service brakes?

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AUse the service brakes continuously with light foot pressure to hold a steady speed✓BSelect an appropriate transmission gear and modulate the retarder in stages to match the descent speed, keeping friction service brakes cold for emergency stopping✓CShift the automated transmission into neutral to allow free coasting and save fuel✓DTurn off the engine retarder switch and pump the service brakes rapidly every 3 seconds✓

QUESTION 11 / 25

How should a driver operating an automated manual transmission (AMT) bus approach an uphill gradient to maintain passenger comfort and avoid driveline shudder?

Choose one answer below.

AAllow the transmission to auto-shift at minimum engine RPM while climbing the steepest section✓BAnticipate the gradient early, switch to manual mode if necessary, and pre-select a gear that keeps the engine in its optimal torque band without hunting✓CDepress the accelerator pedal to kickdown repeatedly throughout the entire climb✓DApply the retarder step 3 while simultaneously applying full throttle✓

QUESTION 12 / 25

During heavy rainfall with 50 passengers on board, the saloon windows begin to fog up rapidly. What is the most effective HVAC configuration to restore clear visibility?

Choose one answer below.

ASet the HVAC system to 100% air recirculation and turn off the A/C compressor✓BSet the HVAC system to fresh-air mode (Außenluft), activate the air conditioning compressor to dehumidify incoming air, and direct airflow to the windshield and side glazing✓COpen all roof hatches fully while maintaining maximum heater blower speed✓DTurn off the cabin heating system and instruct all passengers to close their window curtains✓

QUESTION 13 / 25

What is the operational benefit of Continuous Damping Control (CDC / adaptive electronic shock absorbers) in modern passenger coaches?

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AIt completely eliminates the requirement for pneumatic air springs on the front axle✓BIt continuously adjusts shock absorber valving in milliseconds based on road surface and sensor inputs, minimizing body pitch, roll, and high-frequency vibration✓CIt locks the steering axle rigidly during windy motorway driving✓DIt automatically converts braking heat into electrical energy stored in the retarder✓

QUESTION 14 / 25

How should a driver accelerate away from a bus stop with standing passengers to ensure safety and comfort?

Choose one answer below.

AApply full throttle immediately to join traffic gaps as quickly as possible✓BRelease the bus stop brake, allow the vehicle to roll smoothly, and apply throttle progressively to build speed without abrupt torque spikes✓CKeep the parking brake half-applied while revving the engine in first gear✓DAccelerate aggressively while simultaneously steering in rapid slalom motions✓

QUESTION 15 / 25

When turning a 13-meter 3-axle coach with a long rear overhang (Hecküberhang) in a narrow Austrian city square, what kinematic phenomenon must the driver strictly monitor in the side mirrors?

Choose one answer below.

ARear overhang swing-out (Heckauswurf), where the vehicle body behind the rear axle sweeps outward across adjacent lanes or sidewalks✓BComplete deflation of the inner front air bellows during steering lock✓CAutomatic reverse engagement of the tag axle transmission✓DInversion of the steering wheel angle at speeds below 15 km/h✓

QUESTION 16 / 25

What dynamic axle load transfer occurs when a bus undergoes heavy braking from 80 km/h to a stop?

Choose one answer below.

AMass shifts towards the rear axle, significantly reducing front tire contact pressure✓BDynamic load shifts forward to the front steering axle, compressing front suspension and unweighting the rear drive axle✓CAxle loads remain statically identical regardless of braking force✓DLoad shifts entirely to the curbside tires due to road camber✓

QUESTION 17 / 25

How does 3D Predictive Cruise Control (PPC / topography-based cruise control) enhance both passenger comfort and fuel efficiency on undulating highway routes?

Choose one answer below.

AIt disables the engine cooling fan and cuts saloon air conditioning on every incline✓BIt uses GPS and 3D topographic terrain map data to anticipate crests and dips, accelerating gently before hills and utilizing EcoRoll/coasting over crests to avoid harsh gear changes✓CIt forces the vehicle to travel at the absolute maximum speed limit regardless of traffic conditions✓DIt engages the mechanical retarder continuously on flat highway sections✓

QUESTION 18 / 25

A fully loaded Class II intercity bus traveling at 50 km/h (13.89 m/s) on a dry asphalt road carries standing passengers. If an emergency stop requires a deceleration rate of 6.0 m/s², what is the braking distance (excluding reaction time), and what is the risk to standing passengers?

Choose one answer below.

ABraking distance is approx. 16.1 meters; standing passengers will be thrown violently forward with forces exceeding their physical grip threshold✓BBraking distance is 45.5 meters; standing passengers will experience no force displacement✓CBraking distance is 2.5 meters; passengers are completely protected by the low vehicle center of gravity✓DBraking distance is 80.0 meters; the retarder eliminates all forward inertial forces✓

QUESTION 19 / 25

When driving a touring coach onto a roll-on/roll-off ferry or over a steep garage ramp, how should the driver use the chassis lift function (Fähranhebung / Niveauanhebung)?

Choose one answer below.

AActivate kneeling on the left side only to reduce vehicle height✓BActivate the electronic chassis lift switch to raise the entire body 50-80 mm above standard level, driving at walking speed to avoid ramp grounding✓CDeflate all air bellows to resting bump stops to stiffen the suspension✓DDisengage the transmission clutch and allow the coach to roll under its own momentum✓

QUESTION 20 / 25

How does the Electronic Brake System (EBS) with integrated brake blending coordinate service and auxiliary brakes when the driver depresses the brake pedal?

Choose one answer below.

AIt locks the retarder completely out until the brake pedal reaches 100% full travel✓BIt prioritizes wear-free retarder torque in the initial pedal travel and seamlessly blends in the pneumatic friction disc brakes as deceleration demand increases✓CIt applies friction brakes only on the front axle and retarder braking only on the tag axle✓DIt vents air from the air suspension to lower the vehicle center of gravity before braking✓

QUESTION 21 / 25

Under Regulation (EC) No 561/2006, what is the maximum standard daily driving time permitted for a bus driver, and how many times per week may it be extended to 10 hours?

Choose one answer below.

AMaximum 8 hours daily; no extensions permitted✓BMaximum 9 hours daily; may be extended to a maximum of 10 hours not more than twice in a week✓CMaximum 10 hours daily; may be extended to 12 hours once a week✓DMaximum 9 hours daily; may be extended to 11 hours up to three times a week✓

QUESTION 22 / 25

Under VO (EG) 561/2006, what are the strict rules governing the splitting of the mandatory 45-minute driving break?

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AThe break can be split into any combination of three 15-minute pauses✓BThe break may only be replaced by a first break of at least 15 minutes followed by a second break of at least 30 minutes, distributed over the 4.5-hour driving period✓CThe break may be split into a 30-minute pause followed by a 15-minute pause✓DThe break can be split into nine 5-minute pauses taken at passenger bus stops✓

QUESTION 23 / 25

A coach driver accumulated 54 hours of driving time in week 1. Under Regulation (EC) No 561/2006, what is the absolute maximum driving time the driver may legally accumulate in week 2?

Choose one answer below.

A56 hours✓B36 hours✓C45 hours✓D40 hours✓

QUESTION 24 / 25

To which specific type of passenger transport does the '12-day derogation' (12-Tage-Ausnahmeregelung) under Article 8(6a) of Regulation (EC) No 561/2006 apply?

Choose one answer below.

AAll domestic scheduled regular line services within Austria✓BA single international occasional service (einzelner grenzüberschreitender Gelegenheitsverkehr) for passenger coach transport✓CRegular airport shuttle services operating on fixed timetables✓DDomestic school bus transport contracted by local municipalities✓

QUESTION 25 / 25

Which vehicle equipment requirement must be satisfied for a bus to legally utilize the 12-day derogation under Article 8(6a) of Regulation (EC) No 561/2006?

Choose one answer below.

AThe coach must be fitted with an analogue paper-disc tachograph calibrated within the last 6 months✓BThe coach must be equipped with a digital tachograph (recording equipment in conformity with Annex IB or Annex IC to Regulation (EU) No 165/2014)✓CThe coach must be equipped with an automatic tire pressure inflation system on all axles✓DThe coach must have an electric pantograph for auxiliary power✓