C2

Question 1

what does the hammer mode of a hammer drill do?

Answer 1

Drill threw concrete

Question 2

hammer drills are capable of drilling what size holes?

Answer 2

20mm (3/4”)

Question 3

Rotary Hammers have what modes?

Answer 3

Hammer only, Rotary Hammer, rotary only

Question 4

rotary drills are capable of drilling what size holes?

Answer 4

50mm (2”)

Question 5

What should you use to ensure the exact depth specified by the manufacturer?

Answer 5

Depth Gauge

Question 6

What are core bits used for?

Answer 6

Drilling large diameter holes 50-150mm (2-6”)

Question 7

what are the teeth of a core bit?

Answer 7

Industrial Diamonds

Question 8

Largest diamter holes are drilled with what?

Answer 8

Rig-mounted coring drill can drill up too 350mm (14”)

Question 9

What precautions should be taken when handling carbide tipped bits?

Answer 9

They tend too be brittle and snap if forced with too much pressure

Question 10

How are angle grinders sized?

Answer 10

By the maximum wheel size they can Handel (4.5-7”)

Question 11

What three types of wheels are there for cutting metal?

Answer 11

Ferrous metal wheels (cast-iron, steel)
Non-ferrous metal wheels (brass, copper, aluminum)
Cut-off wheels (zip disk)

Question 12

What three types of concrete cutting wheels?

Answer 12

Wheels for cuttting masonry, stucco, plaster

Concrete grinding wheels

Abrasive cup wheels

Question 13

wire wheels and cups are used for what?

Answer 13

grinding the surface of metal for painting

Question 14

RPM on the wheel must be lower than the grinder true or false?

Answer 14

True

Question 15

power trowel sizes are determined by what?

Answer 15

the diameter of the circle made usually 24-48”

Question 16

how wide is the range of a ride on power trowel?

Answer 16

up too 1.5 m (60”)

Question 17

what are the two basic blades of a power trowel?

Answer 17

floats and trowel blades

Question 18

what are floats used for?

Answer 18

used for final levelling of the concrete surface before finishing

Question 19

what are trowel blades used for?

Answer 19

producing a mirror like finish on the concrete surface

Question 20

when do you start the finishing process?

Answer 20

when all the bleed water has evaporated

Question 21

how do you move a power trowel while running?

Answer 21

lifting or pressing down on the handles will laterally move the machine

Question 22

how do you change the angle of the blade?

Answer 22

turning the Blade Adjustment

Question 23

what does burnished surface mean?

Answer 23

a smooth mirror like finish

Question 24

list five procedures used when finishing a concrete slab

Answer 24

• concrete is level
• concrete has support
• bleed water has evaporated
• use uniform movements of the trowel
• allow for hardening between passes