13.7: Review Questions
- Page ID
- 63625
\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)
\( \newcommand{\dsum}{\displaystyle\sum\limits} \)
\( \newcommand{\dint}{\displaystyle\int\limits} \)
\( \newcommand{\dlim}{\displaystyle\lim\limits} \)
\( \newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\)
( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\)
\( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\)
\( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\)
\( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\)
\( \newcommand{\Span}{\mathrm{span}}\)
\( \newcommand{\id}{\mathrm{id}}\)
\( \newcommand{\Span}{\mathrm{span}}\)
\( \newcommand{\kernel}{\mathrm{null}\,}\)
\( \newcommand{\range}{\mathrm{range}\,}\)
\( \newcommand{\RealPart}{\mathrm{Re}}\)
\( \newcommand{\ImaginaryPart}{\mathrm{Im}}\)
\( \newcommand{\Argument}{\mathrm{Arg}}\)
\( \newcommand{\norm}[1]{\| #1 \|}\)
\( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\)
\( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\AA}{\unicode[.8,0]{x212B}}\)
\( \newcommand{\vectorA}[1]{\vec{#1}} % arrow\)
\( \newcommand{\vectorAt}[1]{\vec{\text{#1}}} % arrow\)
\( \newcommand{\vectorB}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\( \newcommand{\vectorC}[1]{\textbf{#1}} \)
\( \newcommand{\vectorD}[1]{\overrightarrow{#1}} \)
\( \newcommand{\vectorDt}[1]{\overrightarrow{\text{#1}}} \)
\( \newcommand{\vectE}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{\mathbf {#1}}}} \)
\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \)
\(\newcommand{\longvect}{\overrightarrow}\)
\( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)
\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)Multiple Choice Questions
1. Which of the following is a supported scaffold?
(a) a platform suspended by ropes from above
(b) a platform supported by poles or frames
(c) a movable ladder
(d) a rope hoist system
2. The main reason for scaffold-related injuries is:
(a) improper weather conditions
(b) lack of proper training and unsafe setup
(c) faulty building materials
(d) use of metal planks
3. According to OSHA, scaffolds must be designed by:
(a) a competent person
(b) a qualified person
(c) a site supervisor
(d) the construction foreman
4. A scaffold is best defined as:
(a) a permanent structure used in building
(b) an elevated, temporary work platform
(c) a steel frame used for welding
(d) a fixed stair system for buildings
5. A competent person is defined by OSHA as someone who:
(a) has a college degree in construction
(b) can identify existing and predictable hazards and has authority to correct them
(c) works under the direction of a foreman
(d) supervises scaffold users only
6. A qualified person is defined as someone who:
(a) has recognized credentials or extensive experience to solve scaffold-related problems
(b) has attended at least one scaffold safety class
(c) is assigned by the employer as team leader
(d) holds an OSHA card
7. Who is responsible for inspecting scaffolds before each work shift?
(a) competent person
(b) qualified person
(c) site manager
(d) any work on site
8. Each scaffold must support at least:
(a) Twice the maximum intended load
(b) Four times the maximum intended load
(c) Five times the total work weight
(d) Only its own weight
9. Which of the following cannot be used as a means of access to a scaffold?
(a) Cross-bracing
(b) Hook-on ladder
(c) Stair tower
(d) Built-in ladder
10. Which of the following provides acceptable fall protection?
(a) Hard hat
(b) Guardrail system or personal fall arrest system
(c) Safety net only
(d) Toe boards
11. Narrow frame scaffolds are also known as:
(a) Baker/Perry style scaffolds
(b) Swing stage scaffolds
(c) Tower scaffolds
(d) Mason scaffolds
12. Which of the following is not a common scaffold hazard?
(a) Falls from elevation
(b) Collapse due to instability
(c) Electrocution
(d) Exposure to sunlight
13. Which of the following is not safe practice when working on scaffolds?
(a) Locking scaffold wheels during use
(b) Using guardrails and toe boards
(c) Moving a scaffold while a worker is on it
(d) Keeping the platform clear of tripping hazards
14. If a scaffold shifts because it was built on unstable ground, the employer failed to:
(a) Provide proper signage
(b) Conduct an engineering survey
(c) Ensure a competent person supervised its erection
(d) Train workers in electrical safety
15. Which of the following statements about scaffold load capacity is correct?
(a) Scaffolds must support only the worker’s weight
(b) Scaffolds must support at least twice the intended load
(c) Scaffolds must support their own weight plus four times the intended load
(d) Scaffolds must support their own weight plus ten times the intended load
16. What should be done if a scaffold or its component is found damaged?
(a) Continue using it until the shift ends
(b) Report it but continue working
(c) Removing it from service until repaired or replaced
(d) Strengthen it using spare boards
17. When must employers retrain scaffold workers?
(a) Every 5 years
(b) Whenever unsafe practices or new hazards are identified
(c) Only after an accident occurs
(d) Once per project completion
True/False Questions
18. True/False: A scaffold is a permanent structure used for accessing elevated areas.
19. True/False: Scaffold accidents usually occur due to untrained workers or improper training.
20. True/False: Scaffold safety training is optional if the worksite supervisor is present.
21. True/False: A competent person has the authority to correct hazards immediately.
22. True/False: Scaffold platforms can have any amount of space between the planks and uprights.
23. True/False: A hard hat alone provides sufficient protection against falling objects.
24. True/False: Employers must retrain workers whenever unsafe practices or condition changes are observed.
25. True/False: Scaffolds can safely be moved with workers on the platform, as long as the surface is level.
Answer Key: 1) b, 2) b, 3) b, 4) b, 5) b, 6) a, 7) a, 8) b, 9) a, 10) b, 11) a, 12) d, 13) c, 14) c, 15) c, 16) c, 17) b, 18) False, 19) True, 20) False, 21) True, 22) False, 23) False, 24) True, 25) False.