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C 54 EXAM 2025 | CERAMIC AND MOSAIC
TILE CONTRACTORS LICENSE EXAM |
ALL QUESTIONS AND CORRECT
ANSWERS | GRADED A+ | VERIFIED
ANSWERS | LATEST EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS
A 90° corner is specified when installing a sink, the deck lath should be
held away from the wall: Ans: 1 inches
A tile cove is specified when installing a sink, the deck lath should be held
away from the wall: Ans: 3 inches
A 90° corner is specified when installing a sink, the cabinet should be (-
)wider than the sink from front to back. Ans: 2 inches
A tile cove is specified when installing a sink, the cabinet should be (-)
wider than the sink from front Ans: 4 inches
The layout should start with (-) , on a straight- run drain board with a
diagonal deck: Ans: Full diagonals at the cap and at the sink
On a straight-run drainboard with a straight deck, layout should start
with: Ans: a full tile on the cap
When installing a Pullman without using trim shapes, how large of a joint
should be left around it? Ans: 1/16 inch
The V-cap is (-) backed with mortar. Ans: fully
What is the maximum depth of the mortar, when using a V-cap apron?
Ans: 1 inch
When using V-cap apron, what is the minimum depth of mortar? Ans:
3/4 in
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The bottom of V-cap should be set (-) in a countertop from finish floor:
Ans: 34 5/8 inches
The tile-setter should (-) when installing felt in a sink cabinet cavity.
Ans: lap the felt into the sink cavity
Before cleaning the wall tile after grouting, how long should you wait?
Ans: 72 hours
When cleaning tile, which of the following statements is NOT true? Ans:
grout requires separate scrubbing
When installing a tiled-in Pullman, what is the reveal between the trim
and edge of the basin? Ans: 1/8 inch
You should wait (-) before cleaning a quarry floor after laying it: Ans: 72
hours
What should you have the tile-setter do after they have completed one
wall and were about to start the other? Ans: wait 48 hours before
starting the opposite (back) side of the same wall
You have two apprentices to clean a tile floor; one has an acid product
and the other has a stiff brush.You should tell them: Ans: to use neutral
soap
What do you NOT do when you are in charge of cleaning on a tile floor
job? Ans: as floor is being tiled, stack all items in a neat pile
Mike had a concrete floor that he wanted to tile. He cleaned the floor and
laid tile with thin set base. Is this correct? Ans: No it should have a
mortar bed
Corners in a shower receptor should be reinforced by (-) before installing
tile. Ans: 50 lb. tear-strength woven glass fiber webbing hot mopped in
place and extending 4 inches in all directions from each corner
The best method of waterproofing a shower is: Ans: 3 layers of 15 lb.
felt with hot mopping
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The total thickness of the mortar bed should never be less than (-) at any
point when you are installing shower receptors. Ans: 1 3/4 inches
Organic mastic should NOT be used for: Ans: tile in a shower
What is the minimum drain for a shower floor? Ans: 1/4 inch per foot
What mortar mix ratio should be used for a shower (pipe) wall? Ans: 1:4
When the plug is removed for a tile-lined shower receptor: Ans: all of
the test water must drain out by gravity through the weep holes
How should you clean glass mosaic tile (other than small tile mosaic)?
Ans: a soft brush; after it is set, scrub with an abrasive nylon pad and
give a light acid cleaning (1 part muriatic acid: 20 parts water).
What should the tile-setting first do, when installing a mosaic (glass or
marble) floor? Ans: lay out the mosaic at a different site, keeping each
sheet as tight as possible, and starting with sheet No. 1
When laying a ceramic mosaic tile floor, the tile-setter should: Ans:
begin at the intersection of the two LONGEST right angle walls
What should you do when using a kneeling board to lay mosaic tile?
Ans: use kneeling board not less than 6 inches or more than 12 inches
wide
Is this a correct procedure, if a dash coat for a mosaic tile was made
using 1 part sand and 1 part Portland cement? Ans: No: it needs more
sand
The width of an expansion joint in mosaic tile should be: Ans: 1/4 inch
The box screed method is used for mosaic tile installations to: Ans:
insure uniform thickness for mosaics: spread a fine mortar on the back of
the sheets and rod off lightly
Which of the following is NOT correct, when bending wire in a mortar
ceiling? Ans: bend the edges down on the wall
C 54 EXAM 2025 | CERAMIC AND MOSAIC
TILE CONTRACTORS LICENSE EXAM |
ALL QUESTIONS AND CORRECT
ANSWERS | GRADED A+ | VERIFIED
ANSWERS | LATEST EXAM QUESTIONS
WITH DETAILED VERIFIED ANSWERS
A 90° corner is specified when installing a sink, the deck lath should be
held away from the wall: Ans: 1 inches
A tile cove is specified when installing a sink, the deck lath should be held
away from the wall: Ans: 3 inches
A 90° corner is specified when installing a sink, the cabinet should be (-
)wider than the sink from front to back. Ans: 2 inches
A tile cove is specified when installing a sink, the cabinet should be (-)
wider than the sink from front Ans: 4 inches
The layout should start with (-) , on a straight- run drain board with a
diagonal deck: Ans: Full diagonals at the cap and at the sink
On a straight-run drainboard with a straight deck, layout should start
with: Ans: a full tile on the cap
When installing a Pullman without using trim shapes, how large of a joint
should be left around it? Ans: 1/16 inch
The V-cap is (-) backed with mortar. Ans: fully
What is the maximum depth of the mortar, when using a V-cap apron?
Ans: 1 inch
When using V-cap apron, what is the minimum depth of mortar? Ans:
3/4 in
, Page | 2
The bottom of V-cap should be set (-) in a countertop from finish floor:
Ans: 34 5/8 inches
The tile-setter should (-) when installing felt in a sink cabinet cavity.
Ans: lap the felt into the sink cavity
Before cleaning the wall tile after grouting, how long should you wait?
Ans: 72 hours
When cleaning tile, which of the following statements is NOT true? Ans:
grout requires separate scrubbing
When installing a tiled-in Pullman, what is the reveal between the trim
and edge of the basin? Ans: 1/8 inch
You should wait (-) before cleaning a quarry floor after laying it: Ans: 72
hours
What should you have the tile-setter do after they have completed one
wall and were about to start the other? Ans: wait 48 hours before
starting the opposite (back) side of the same wall
You have two apprentices to clean a tile floor; one has an acid product
and the other has a stiff brush.You should tell them: Ans: to use neutral
soap
What do you NOT do when you are in charge of cleaning on a tile floor
job? Ans: as floor is being tiled, stack all items in a neat pile
Mike had a concrete floor that he wanted to tile. He cleaned the floor and
laid tile with thin set base. Is this correct? Ans: No it should have a
mortar bed
Corners in a shower receptor should be reinforced by (-) before installing
tile. Ans: 50 lb. tear-strength woven glass fiber webbing hot mopped in
place and extending 4 inches in all directions from each corner
The best method of waterproofing a shower is: Ans: 3 layers of 15 lb.
felt with hot mopping
, Page | 3
The total thickness of the mortar bed should never be less than (-) at any
point when you are installing shower receptors. Ans: 1 3/4 inches
Organic mastic should NOT be used for: Ans: tile in a shower
What is the minimum drain for a shower floor? Ans: 1/4 inch per foot
What mortar mix ratio should be used for a shower (pipe) wall? Ans: 1:4
When the plug is removed for a tile-lined shower receptor: Ans: all of
the test water must drain out by gravity through the weep holes
How should you clean glass mosaic tile (other than small tile mosaic)?
Ans: a soft brush; after it is set, scrub with an abrasive nylon pad and
give a light acid cleaning (1 part muriatic acid: 20 parts water).
What should the tile-setting first do, when installing a mosaic (glass or
marble) floor? Ans: lay out the mosaic at a different site, keeping each
sheet as tight as possible, and starting with sheet No. 1
When laying a ceramic mosaic tile floor, the tile-setter should: Ans:
begin at the intersection of the two LONGEST right angle walls
What should you do when using a kneeling board to lay mosaic tile?
Ans: use kneeling board not less than 6 inches or more than 12 inches
wide
Is this a correct procedure, if a dash coat for a mosaic tile was made
using 1 part sand and 1 part Portland cement? Ans: No: it needs more
sand
The width of an expansion joint in mosaic tile should be: Ans: 1/4 inch
The box screed method is used for mosaic tile installations to: Ans:
insure uniform thickness for mosaics: spread a fine mortar on the back of
the sheets and rod off lightly
Which of the following is NOT correct, when bending wire in a mortar
ceiling? Ans: bend the edges down on the wall
