Checking Block & Slab Laying

Free S7 questions: Checking Block & Slab Laying

These questions are in the practice set above. Answer them there to see the correct option and the explanation for each.

• Scenario: a supervisor is reviewing the reinstatement proposal for an excavation in a Type 3 modular road. The method named is one of those the Code sets out for Types 3 and 4 modular roads, but it is not the one giving the greatest degree of immediate permanent reinstatement, and the engineer wants the supervisor to refuse it for that reason. What should the supervisor decide, under SROH?
• Scenario: an undertaker tells the supervisor that an excavation in a Type 4 modular road has been reinstated by the Code's first method at the first visit. The backfill, sub-base and bedding are permanent, but the modules have been laid loose for a fortnight to let the bedding settle. What should the supervisor decide, under SROH?
• Scenario: an excavation in a Type 3 modular road is to be reinstated by the Code's two-visit method. At the end of the first visit the supervisor finds the backfill and sub-base reinstated to a permanent standard and the opening left open to sub-base level behind barriers until the second visit. What should the supervisor decide, under SROH?
• Scenario: an undertaker returns for the second visit to a Type 3 modular road. The gang plans to plane off the interim bituminous surface course, leave the interim granular base where it is to serve as the permanent base, and lay the bedding and modules on top of it. What should the supervisor require, under SROH?
• Scenario: a supervisor is checking the reinstatement of a modular footway. The gang has laid its sub-base and bedding to the materials and thicknesses shown for the carriageway alongside, on the view that the footway takes its layers from the road beside it. What should the supervisor check the layers against, under SROH?
• Scenario: a supervisor inspecting a modular footway reinstatement finds the gang bedding new blocks while the clean, undamaged blocks lifted from the same opening are stacked to one side. The ganger explains that the new ones give a tidier finish. What should the supervisor do, under SROH?
• Scenario: the supervisor sees a concrete block with a clean break across one corner being bedded into the middle of the permanent reinstatement of a concrete block footway, the two pieces sitting tight together and flush with their neighbours. No re-use of damaged modules has been agreed. What should the supervisor do, under SROH?
• Scenario: several flags were broken as the undertaker's gang lifted them, and replacements are needed. The undertaker proposes to take replacements from the authority's stock and to invoice the authority for them, on the footing that the authority holds the stock and the flags were old anyway. What should the supervisor decide, under SROH?
• Scenario: the laying course found in a modular footway being reinstated is mortar, and the reinstatement's laying course is to match it. The undertaker proposes to set the mortar specification itself from a sample of the old bed, without asking the authority. What should the supervisor decide, under SROH?
• Scenario: an excavation runs through a footway surfaced in natural stone setts. The gang breaks them out and the supervisor finds them going into the muckaway skip with the sub-base arisings, the ganger saying replacements will be bought in. What should the supervisor require, under SROH?

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