DGT C1 licence questions: Mechanics and maintenance

Page 2 of 2 · Questions 101 to 142 of 142

101. A lorry will overtake a cyclist outside a built-up area on a road with one lane in each direction. What minimum lateral separation must it…
102. When the tyre inflation pressure of your lorry is higher than recommended...
103. Is an articulated vehicle a vehicle combination?
104. In an engine, besides lubricating the moving parts and the cylinder walls, what other purpose does the oil serve?
105. Between sunset and sunrise, a lorry travels on a sufficiently lit through-road in a built-up area with no adverse weather. In addition to…
106. Before starting the day with a truck it is advisable to carry out:
107. In a combustion engine with a turbocharger and intercooler, where is the intake air filter located?
108. When you turn on the ignition, the oil warning light comes on, and it goes off once the engine starts. What is this due to?
109. In a conventional liquid-cooling circuit with a thermostat and internal bypass, how does the thermostat help a cold engine warm up?
110. Can a manufacturer-specified and integrated electromagnetic retarder operate in a vehicle equipped with ABS?
111. In efficient driving with a manual synchronised gearbox in good condition, why avoid unnecessary double-declutching?
112. Under comparable driving conditions, which tyre condition tends to increase fuel consumption?
113. If you notice unusual noises or vibrations in a C1 or C truck, the prudent action is to:
114. Before driving a lorry through very cold areas, what should you check about its coolant?
115. What is the part of the tyre that rests on the ground called?
116. In the tyre marking 385/65 R22.5, what does the number 22.5 indicate?
117. What maintenance should we carry out on the cooling system?
118. At the same engine speed with no other changes, if oil becomes hotter and its viscosity decreases, how can this affect lubrication pressure?
119. An insulated vehicle has a mechanical-compression or absorption refrigeration unit that lowers and maintains its body temperature. Which…
120. In a lorry diesel engine, what may abnormal black exhaust smoke be associated with?
121. A heat-exchanging mechanism, or intercooler, achieves...
122. When leaving the driving position after parking a 6,000 kg MAM lorry with a manual gearbox on a noticeable 8% slope, besides stopping the…
123. In a C1 or C truck, correct tire pressure:
124. In a truck, preventive maintenance of the braking system is important because:
125. A lorry has a body with insulated walls, doors, floor and roof to limit heat transfer, without a cold source or refrigeration equipment.…
126. For an engine with a toothed timing belt that runs dry, what belt maintenance should you follow?
127. A lorry has a battery master switch. If the instrument panel receives no power when the ignition is switched on, what initial check…
128. What are the crankshaft surfaces that rotate in the engine block’s main bearings called?
129. To check a lorry’s oil level with the dipstick, its manufacturer specifies checking before starting, with a cold engine and the vehicle on…
130. A liquid-cooled lorry has an expansion tank marked MIN and MAX. When checked under manufacturer instructions, how should the level be?
131. A lorry has hydraulic power steering with a reservoir marked MIN and MAX. Should its fluid level be checked?
132. What general term covers changes such as joining traffic, moving into another lane or turning, which alter the vehicle’s normal progress?
133. Which of the following parameters affects the adjustment of the driver's seat?
134. To compare and adjust lorry tyre pressure to the recommended cold value for its load, when should it be checked?
135. During normal driving while maintaining steering control, the vehicle persistently pulls to one side without an apparent road or wind…
136. With the same oil and engine speed, other factors being equal, which oil condition can favour lower pressure by reducing its viscosity?
137. If a warning appears in a C1 or C truck indicating a major fault, the correct action is to:
138. The manufacturer specifies a 12 V system using two compatible 12 V batteries connected in parallel. How are their terminals linked in that…
139. What is the purpose of a heat exchanger mechanism or intercooler?
140. In a diesel engine with a conventional turbocharger lubricated by the engine oil circuit, what oil lubricates its bearings?
141. By day, a lorry without front fog lamps and with no main beam in use travels on an interurban road in light snowfall that significantly…
142. Two batteries, each with a nominal voltage of 12 V, are correctly connected in series so that their voltages add. What is the combination’s…