South Carolina Hollow Metal Door
Installer Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following safety practices is required before beginning
installation of a hollow metal door in South Carolina commercial
construction?
A. Installing the door without anchoring it first
B. Locking out and tagging out all power tools and ensuring the work
area is free of hazards
C. Painting the frame after installation to save time
D. Ignoring manufacturer’s installation instructions since field
conditions vary
Rationale: Proper lockout/tagout and hazard assessment prevents
injury and adheres to workplace safety standards.
2. What is the minimum recommended clearance between a hollow
metal door and its frame for most commercial installations?
A. 3 inches
B. 1 inch
C. 1/8 inch
D. 1/2 inch
, Rationale: A clearance of approximately 1/8 inch ensures adequate
movement without binding or excessive air infiltration.
3. When anchoring a hollow metal frame in masonry construction, what
type of fastener is typically used?
A. Wood screws
B. Plastic anchors
C. Masonry anchors or expansion bolts
D. Sheet metal screws
Rationale: Masonry anchors are designed to secure frames into
concrete or CMU walls for structural stability.
4. In fire-rated hollow metal door assemblies, what must be provided to
maintain the fire rating?
A. Weatherstripping only
B. Fire-rated gasketing and intumescent strips
C. Non-rated hinges
D. Decorative hardware
Rationale: Fire-rated assemblies require fire-rated components that
expand under heat to seal gaps against smoke and flame.
5. What is the primary function of an astragal on a pair of hollow metal
doors?
A. Decorative enhancement
B. Insulation
C. To close the gap between two door leaves and reduce air
infiltration
D. To reinforce the door edge
Rationale: An astragal covers the meeting stile gap, improving
security and reducing drafts.
6. Which tool is essential for plumb and square installation of a metal
door frame?
, A. Chainsaw
B. Level and square
C. Chisel
D. Sledgehammer
Rationale: A level and square ensure the frame is true vertically and
horizontally for proper door operation.
7. During installation, the door frame must be anchored so that the
frame’s rabbets are:
A. Twisted
B. Offset
C. Plumb and in correct alignment with the wall surface
D. Wider than the wall opening
Rationale: Proper alignment ensures the door will fit and function as
designed.
8. What component prevents a hollow metal door from swinging past
180 degrees?
A. Weatherstrip
B. Door stop or a stop block
C. Threshold
D. Kick plate
Rationale: Stops limit the door’s swing to prevent damage to
adjacent structures and ensure safe operation.
9. Which hinge type is most commonly used on hollow metal doors in
commercial settings?
A. Concealed European hinges
B. Pivot hinges
C. Ball bearing butt hinges
D. Strap hinges
Installer Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following safety practices is required before beginning
installation of a hollow metal door in South Carolina commercial
construction?
A. Installing the door without anchoring it first
B. Locking out and tagging out all power tools and ensuring the work
area is free of hazards
C. Painting the frame after installation to save time
D. Ignoring manufacturer’s installation instructions since field
conditions vary
Rationale: Proper lockout/tagout and hazard assessment prevents
injury and adheres to workplace safety standards.
2. What is the minimum recommended clearance between a hollow
metal door and its frame for most commercial installations?
A. 3 inches
B. 1 inch
C. 1/8 inch
D. 1/2 inch
, Rationale: A clearance of approximately 1/8 inch ensures adequate
movement without binding or excessive air infiltration.
3. When anchoring a hollow metal frame in masonry construction, what
type of fastener is typically used?
A. Wood screws
B. Plastic anchors
C. Masonry anchors or expansion bolts
D. Sheet metal screws
Rationale: Masonry anchors are designed to secure frames into
concrete or CMU walls for structural stability.
4. In fire-rated hollow metal door assemblies, what must be provided to
maintain the fire rating?
A. Weatherstripping only
B. Fire-rated gasketing and intumescent strips
C. Non-rated hinges
D. Decorative hardware
Rationale: Fire-rated assemblies require fire-rated components that
expand under heat to seal gaps against smoke and flame.
5. What is the primary function of an astragal on a pair of hollow metal
doors?
A. Decorative enhancement
B. Insulation
C. To close the gap between two door leaves and reduce air
infiltration
D. To reinforce the door edge
Rationale: An astragal covers the meeting stile gap, improving
security and reducing drafts.
6. Which tool is essential for plumb and square installation of a metal
door frame?
, A. Chainsaw
B. Level and square
C. Chisel
D. Sledgehammer
Rationale: A level and square ensure the frame is true vertically and
horizontally for proper door operation.
7. During installation, the door frame must be anchored so that the
frame’s rabbets are:
A. Twisted
B. Offset
C. Plumb and in correct alignment with the wall surface
D. Wider than the wall opening
Rationale: Proper alignment ensures the door will fit and function as
designed.
8. What component prevents a hollow metal door from swinging past
180 degrees?
A. Weatherstrip
B. Door stop or a stop block
C. Threshold
D. Kick plate
Rationale: Stops limit the door’s swing to prevent damage to
adjacent structures and ensure safe operation.
9. Which hinge type is most commonly used on hollow metal doors in
commercial settings?
A. Concealed European hinges
B. Pivot hinges
C. Ball bearing butt hinges
D. Strap hinges
