C-54 Examination Latest Update 2025-2026 Exam 275 Questions with 100% Verified Correct Answers Guaranteed A+
"dog-leg" stairway has what kind of lathing? - CORRECT ANSWER: one half-turn landing
(-) is NOT a waterproofing admixture - CORRECT ANSWER: THL dust
(-) is NOT true of epoxies. - CORRECT ANSWER: they have a very long pot life
(-) is the maximum spacing allowed for expansion joints in concrete surfaces on white
interior tile is laid. - CORRECT ANSWER: 30 ft
(-) is used to set ceramic tile in Roman tubs: - CORRECT ANSWER: Portland cement mortar
(-) is when you throw dry cement along the border of wall or corner of a countertop: -
CORRECT ANSWER: dusting
(-) water is used in preparing the mortar for Roman tubs: - CORRECT ANSWER: potable
- The next step is (-) when you check a Roman tub after the scratch coat has been
laid. - CORRECT ANSWER: fill with water to overflow and wait for 24 hours
A 90° corner is specified when installing a sink, the cabinet should be (-)wider than the
sink from front to back. - CORRECT ANSWER: 2 inches
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A 90° corner is specified when installing a sink, the deck lath should be held away from the wall: - CORRECT ANSWER: 1 inches
A bond is: - CORRECT ANSWER: adherence of one material to another
A deflection standard of 1/360, the span means that a wall 8 feet long must not be able to bow more than: - CORRECT ANSWER: 1/4in: 8x12=96/360=0.27
A dispute arises between you and another contractor about who is responsible for cleaning up some scraps and trash. The owner pays for the clean-up and charges you (the C-54 contractor) because the architect determines that you are the responsible party. This procedure is: - CORRECT ANSWER: in accordance with standard practice.
A mortar bed should be (-) thick to require a scratch coat over cement. - CORRECT
ANSWER: 3/4"
A nail and a rake are used in setting: - CORRECT ANSWER: thresholds
A new installation should never be acid cleaned. Floors should cure for at least (-) days
before cleaning. - CORRECT ANSWER: 3
A resin base cement grout can be used as a bond coat and as a: - CORRECT
ANSWER: setting bed
A Roman bath should be water-tested: - CORRECT ANSWER: at least 24 hours
A story pole can be used to: - CORRECT ANSWER: determine the size of end cuts
A tile cove is specified when installing a sink, the cabinet should be (-) wider than the
sink from front - CORRECT ANSWER: 4 inches
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A tile cove is specified when installing a sink, the deck lath should be held away from the wall: - CORRECT ANSWER: 3 inches
Adding water and remixing mortar will tend to cause mortar to - CORRECT ANSWER:
Weaken
Adjusting tile after it is applied to a ceiling, you can expеct: - CORRECT ANSWER: to break the bond
After a worker sandblasts a wall, apply: - CORRECT ANSWER: dash coat
After the first row of tile is applied, proceed with not more than how many rows at a
time? - CORRECT ANSWER: four
After the plane has been carefully studied for the layout of the stairs, what procedure is
followed next? - CORRECT ANSWER: the rise and run of the stairs are determined
All lining materials shall be pitched (-) inch per foot. - CORRECT ANSWER: 1/4
An ample width for a control joint is: - CORRECT ANSWER: 1/4 inch
Anchors should be formed from anchors made of: - CORRECT ANSWER: соpper
Approved waterproofing membrane, mortar bed, and finished construction shall conform to: - CORRECT ANSWER: UPC
Asphalt used in Roman tub installation shall conform to federal specifications -
CORRECT ANSWER: Type Z, grade 2, class A
At no time shall the mortar wetting bed be over (-) inches thick - CORRECT ANSWER: 1/2
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