NASCLA (COMMERCIAL) GENERAL CONTRACTOR EXAM PREP
COURSE | COMPLETE QUESTIONS AND ANSWER | 2026 LATEST
UPDATED
When trusses are to be stored for more than one week, in order minimize Later Bending and
lessen moisture gain from the ground they should be stored? - (Answer)Place blocking of
sufficient height beneath them usually at 8-10-foot intervals
Unless expressly agreed through a contract, whose responsibility is it to ensure crane
equipment complies with OSHA standards? - (Answer)The crane operator and/or contractor
When the crane manufacturer's specifications are not available who should be consu lted to
determine and document equipment limitations? - (Answer)A Registered Design Professional
Which of the following are NOT proper procedures when lifting trusses? - (Answer)Some lateral
bending when lifting Trusses is acceptable
Lifting Trusses by the peak using a hook
Never connect lifting devices to the Truss Top Chord with only closed-loop attachments
What is the protocol when installing trusses in adverse weather conditions? - (Answer)Take
special care, especially in high winds or lightning storms
When using a crane within 5 miles of an airport, what should be done prior to crane use? -
(Answer)Contact the airport 30 days prior to crane use
,When lifting single trusses up to 30', use a minimum of _________ pick-points near top chord
joints spaced up to ½ the truss length apart. - (Answer)2
For Trusses from 30-60 feet a ______________ ½ to 1/3 the truss length is used. -
(Answer)Spreader bar
For trusses over 60 feet , use a spreader bar ________________ of the truss length. -
(Answer)2/3 - 3/4
Which of the following is NOT true of the first truss installed? - (Answer)The first Truss is not to
be relied upon for the stability of the other Trusses
Unless another size is specified by the building designer, the minimum size of stress-graded
lumber used at Lateral Restraint and Diagonal Bracing is? - (Answer)2x4
When the first Truss cannot be Braced from the exterior, where should it be installed? -
(Answer)Install it in the center of building
Top Chord bearing flat or Parallel Chord Trusses shall be installed so that the gap between the
inside edge of the bearing and the first diagonal or vertical web member does not exceed? -
(Answer)½ inch
The spacing of Trusses along bearing support must be within +/- _________ of plan dimension?
- (Answer)¼ inch
An important aspect of installing Lateral Restraints and Diagonal Bracing in regard to Truss
spacing is? - (Answer)The trusses need to have exact spacing before the Bracing and Restraints
are installed
,When dealing with Lateral Restraints and Bracing it is ok to proceed with construction when? -
(Answer)Bracing is securely and properly in place
Do not stack materials on Trusses when they are? - (Answer)Unbraced
When stacking material on Trusses it should be located where? - (Answer)Next to outside load-
bearing walls
Over interior load bearing walls
Which of the following is true of Lateral Restraints? - (Answer)They need to be braced
Which of the following are things to consider before erecting Trusses? - (Answer)Make sure the
building is the correct size for the Trusses
Make sure load bearing supports are plumb and properly braced
The tops of bearing supports are at proper elevation
Install Web Member Plane Diagonal Bracing to stabilize the first _______ Trusses. - (Answer)5
While installing Trusses, when setting the first Truss it is important to attach it to? -
(Answer)Ground Bracing
When using lumber for Diagonal Bracing, it must be at least ___________ stress-graded lumber.
- (Answer)2x4
Each restraint must be attached by at least ______ nails per Truss. - (Answer)2
Install web braces so that they cross the web members at approximately what angle? -
(Answer)45°
, Diagonal bracing should be placed every ___________ Truss members at 20' maximum
intervals. - (Answer)10
What does the acronym BCTLR stand for? - (Answer)Bottom Chord Temporary Lateral Restraint
Diagonal Bracing is also required where? - (Answer)At each end of the building
Every 10 truss spaces
With long-length continuous Top Chord Temporary Lateral Restraints maximum distance
between Diagonal Bracing is how many feet? - (Answer)20 feet
After the first set of trusses have been installed properly, structural sheathing should be? -
(Answer)Installed immediately
The series of Trusses that decrease in height to form the slope of a hip roof are called? -
(Answer)Hip Set
What is a Valley set? - (Answer)A group of Truss frames designed to sit on top of other trusses
and change the direction of roof planes
What is the danger of Trusses that have been over-stressed due to excessive construction
loading? - (Answer)Truss members may break
Truss joints may fail
Trusses show excessive sagging and remain that way after the load has been removed
Which of the following is an acceptable method for storing construction material on Trusses? -
(Answer)Stack a reasonable amount of material that will not overload Trusses
COURSE | COMPLETE QUESTIONS AND ANSWER | 2026 LATEST
UPDATED
When trusses are to be stored for more than one week, in order minimize Later Bending and
lessen moisture gain from the ground they should be stored? - (Answer)Place blocking of
sufficient height beneath them usually at 8-10-foot intervals
Unless expressly agreed through a contract, whose responsibility is it to ensure crane
equipment complies with OSHA standards? - (Answer)The crane operator and/or contractor
When the crane manufacturer's specifications are not available who should be consu lted to
determine and document equipment limitations? - (Answer)A Registered Design Professional
Which of the following are NOT proper procedures when lifting trusses? - (Answer)Some lateral
bending when lifting Trusses is acceptable
Lifting Trusses by the peak using a hook
Never connect lifting devices to the Truss Top Chord with only closed-loop attachments
What is the protocol when installing trusses in adverse weather conditions? - (Answer)Take
special care, especially in high winds or lightning storms
When using a crane within 5 miles of an airport, what should be done prior to crane use? -
(Answer)Contact the airport 30 days prior to crane use
,When lifting single trusses up to 30', use a minimum of _________ pick-points near top chord
joints spaced up to ½ the truss length apart. - (Answer)2
For Trusses from 30-60 feet a ______________ ½ to 1/3 the truss length is used. -
(Answer)Spreader bar
For trusses over 60 feet , use a spreader bar ________________ of the truss length. -
(Answer)2/3 - 3/4
Which of the following is NOT true of the first truss installed? - (Answer)The first Truss is not to
be relied upon for the stability of the other Trusses
Unless another size is specified by the building designer, the minimum size of stress-graded
lumber used at Lateral Restraint and Diagonal Bracing is? - (Answer)2x4
When the first Truss cannot be Braced from the exterior, where should it be installed? -
(Answer)Install it in the center of building
Top Chord bearing flat or Parallel Chord Trusses shall be installed so that the gap between the
inside edge of the bearing and the first diagonal or vertical web member does not exceed? -
(Answer)½ inch
The spacing of Trusses along bearing support must be within +/- _________ of plan dimension?
- (Answer)¼ inch
An important aspect of installing Lateral Restraints and Diagonal Bracing in regard to Truss
spacing is? - (Answer)The trusses need to have exact spacing before the Bracing and Restraints
are installed
,When dealing with Lateral Restraints and Bracing it is ok to proceed with construction when? -
(Answer)Bracing is securely and properly in place
Do not stack materials on Trusses when they are? - (Answer)Unbraced
When stacking material on Trusses it should be located where? - (Answer)Next to outside load-
bearing walls
Over interior load bearing walls
Which of the following is true of Lateral Restraints? - (Answer)They need to be braced
Which of the following are things to consider before erecting Trusses? - (Answer)Make sure the
building is the correct size for the Trusses
Make sure load bearing supports are plumb and properly braced
The tops of bearing supports are at proper elevation
Install Web Member Plane Diagonal Bracing to stabilize the first _______ Trusses. - (Answer)5
While installing Trusses, when setting the first Truss it is important to attach it to? -
(Answer)Ground Bracing
When using lumber for Diagonal Bracing, it must be at least ___________ stress-graded lumber.
- (Answer)2x4
Each restraint must be attached by at least ______ nails per Truss. - (Answer)2
Install web braces so that they cross the web members at approximately what angle? -
(Answer)45°
, Diagonal bracing should be placed every ___________ Truss members at 20' maximum
intervals. - (Answer)10
What does the acronym BCTLR stand for? - (Answer)Bottom Chord Temporary Lateral Restraint
Diagonal Bracing is also required where? - (Answer)At each end of the building
Every 10 truss spaces
With long-length continuous Top Chord Temporary Lateral Restraints maximum distance
between Diagonal Bracing is how many feet? - (Answer)20 feet
After the first set of trusses have been installed properly, structural sheathing should be? -
(Answer)Installed immediately
The series of Trusses that decrease in height to form the slope of a hip roof are called? -
(Answer)Hip Set
What is a Valley set? - (Answer)A group of Truss frames designed to sit on top of other trusses
and change the direction of roof planes
What is the danger of Trusses that have been over-stressed due to excessive construction
loading? - (Answer)Truss members may break
Truss joints may fail
Trusses show excessive sagging and remain that way after the load has been removed
Which of the following is an acceptable method for storing construction material on Trusses? -
(Answer)Stack a reasonable amount of material that will not overload Trusses
