NRSWA Reinstatement Hot Lay Practice Questions - Set 1

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#1. When trimming back the edges in preparing for laying bitumen in a footway, what is the correct Proximity rule?

100mm

150mm

250mm

500mm

#2. What is the minimum depth of a bound edge that must have bitumen edge sealant applied

40mm

60mm

50mm

100mm

#3. What is the minimum residual bitumen content within a bonding coat (Tack coat emulsion)?

0.15Kg/m2

1.5Kg/m2

0.015Kg/m2

0.15Kg/m3

#4. What is the maximum temperature for SMASC with a binder grade of 40/60

170oC

180oC

200oC

130oC

#5. What is the Polished Stone Value (PSV) on a High-Risk Type 0 road?

#6. What is the minimum Texture depth on a road < 60mph when laying SMA?

1.0mm

0.6mm

1.25mm

0.8mm

#7. When working on a Type 4 carriageway what is the preferred bitumen mixture to be used in the surface course when using Asphalt Concrete (AC)

AC 20 Dense Bin 100/150

HRA 35/14 F Surf 40/60 des

AC 10 Close surf 100/150

AC 6 dense surf 100/150

#8. If you were using a HRA 15/10 F surf 100/150 rec in the surface course of a footway, what does the number 10 relate to?

Aggregate size between 15mm & 10mm

Quantity of between 15T & 20T

Aggregate size of 10mm

10% of the mixture is made up of 15mm stone

#9. How do you keep the bitumen warm for use throughout the day, as part of a pot- hole repair scheme?

Tip onto floor and shovel left over material into lorry

Keep uncovered on the bed of the pick-up vehicle

Cover in petrol and ignite when necessary

Store in temperature regulated hot-box

#10. How many passes would you carry out on a 60mm binder layer when operating a Twin Drum vibrating roller of weight 1000-2000Kg/m?

Finish

NRSWA Reinstatement Hot Lay Practice Questions – Set 1