Automatic level questions

Have a go at answering the following questions. When you're ready, scroll down to find out if you chose the right answer.

Point D is at exactly the same height as the top of the concrete block you are using as your datum point.

If you answered:

True	Correct, both measure 1.50 m.
False	Incorrect, check again and you will see that both points measure 1.50 m.

Point C is at 1.89, point A is at 1.87. Which ground level is lower?

If you answered:

Point C	Yes, well done. Point C has the higher measurement so the ground level is lower.
Point A	Sorry. Remember the rule the higher the reading the lower the ground level. Point C has the higher measurement so the ground level is lower.

If Point B needs to be excavated by 14 mm what should the staff reading be when the excavation has been correctly completed?

If you answered:

1.89	Correct. Point B is 1.75. If it is lowered by 14 mm its reading is 1.75 + 14mm = 1.89.
1.61	No, think again. Point B is 1.75. If it is lowered by 14 mm its reading is 1.75 + 14mm = 1.89.
1.14	No, you're way off here. Point B is 1.75. If it is lowered by 14 mm its reading is 1.75 + 14mm = 1.89.

After the excavation in the previous question, will Point A need to be raised or lowered to be level with B and C?

If you answered:

Raised by 2 mm – the reading will be 1.85	No, Point A will need to be lowered, not raised.
Raised by 2 mm – the reading will be 1.89	No, Point A will need to be lowered, not raised.
Lowered by 2mm – the reading will be 1.85	Yes, Point A will need to be lowered. But remember that the lower a point is the higher the value will be, so the reading should be 2 mm greater than 1.87, not less.
Lowered by 2 mm – the reading will be 1.89	Well done, Point A will need to be lowered, meaning that the staff value will increase to 1.89, the same as Point B and C.