concrete and masonry
How long must bracing of walls eight feet or higher last? Select the correct answer and then click the DONE button. a. Until the permanent supporting elements are in place b.Until the concrete is cured c.Until the limited access zone has been removed d.Until jacking operations are complete
a
Removable forms are designed to __________. a.To support vertical and lateral loads until the concrete has set b.To support the structure indefinitely c.To improve the look of the concrete d.To offer a backup for shoring and reshoring equipment
a
What does assembling and installing post-tensioning systems require? Select the correct answer and then click DONE. a.Specialized knowledge, skills, and equipment b.A minimum of 5 years of work experience c.A minimum of 10 years of work experience d.Only minimal training
a
What types of employees are allowed immediately beneath the slab while jacking operations are taking place? Select the correct answer and click the DONE button. a. Essential employees b.Well-trained employees c.Safe employees d. Engineers
a
Which of the following is true about jacking equipment? Select all that apply and then click the DONE button. 1. It must be able to support at least two and one-half times the load being lifted. 2.Never load jacking equipment beyond its rated capacity. 3.The weight to factor in includes any load bearing components used to carry out the lifting operation. 4.Jacking equipment may, however, be overloaded in special situations.
1.2.3
What are some of the requirements that must be met when single post shores are used one on top of another? Select all that apply and then click DONE. 1.A qualified designer must design the shoring. 2.A qualified engineer must inspect the erected shoring. 3.The single post shores must be horizontally aligned. 4. They must be spliced to prevent misalignment.
1.2.4
Which of the following are requirements for the limited access zone? Select all that apply and then click the DONE button. 1.It must be four feet longer than the height of the wall being constructed. 2.It must run the entire length of the wall. 3.It must be placed on the side of the wall that is scaffolded. 4.Only employees engaged in constructing the wall may enter the zone. 5.It must be kept in place until the wall is properly supported.
1.2.4.5
Select the information that is true about lift-slab operations. Select all that apply and then click the DONE button. 1.The operations must be designed and planned by a registered professional engineer who has experience in lift-slab construction. 2.Lift-slab is a rarely used method for concrete construction. 3.The lift slab plans and designs must have detailed instructions and sketches on the method of erection. 4.Anyone is allowed to implement the plans.
1.3
What is a good practice for safe utilization of concrete buckets? Select all that apply and then click DONE. 1.Do not allow employees to ride on top of the buckets 2.Hook additional tools to the bucket that workers above may need 3.Never work under the buckets while they are being raised or lowered 4. Find a route for the elevated bucket that endangers the least possible number of employees
1.3.4
Which of the following is true about requirements for vertical slip forms? Select all that apply and then click DONE. 1.Rods or pipes used must be braced where they are not encased in concrete. 2.The predetermined safe rate of lift may be exceeded in certain situations. 3.Lifting devices must be provided with mechanical dogs or other automatic holding devices. 4.Scaffolds or work platforms must be provided where employees are required to work or pass.
1.3.4
What safety measures must be followed when using jacks during post-tensioning operations? Select all that apply and then click DONE. 1.At least three spotters must be present. 2.Only essential employees are allowed behind the jack. 3.Use signs and barriers to limit employee access to the area. 4. No special safety measures are required.
2.3
hich of the following steps are important for working safely with reinforcing steel? Select all that apply and then click DONE. 1.Make sure reinforcing steel has been cleaned. 2.Secure the ends of wire mesh to prevent it from recoiling. 3.Ensure that any protruding reinforcing steel is properly guarded. 4.Make sure all reinforcing steel is adequately supported.
2.3.4
When is the proper time to remove forms, shores, and reshoring? Select the correct answer and then click DONE. a.When the concrete has gained enough strength to support its weight and all loads placed on it b.When the estimated drying time has been reached c.When the concrete is still in the process of strengthening d.When the formwork has been in place for the estimated time, and the concrete appears solid
a
With single post shores, when is reshoring erected? Select the correct answer and then click DONE. a.When the original forms are removed, if the concrete is required to support loads greater than its capacity b.Prior to removal of original forms, if the concrete is required to support loads greater than its capacity c.Two hours after original forms are removed, if the concrete is required to support loads greater than its capacity d.Never; reshoring is not necessary with most original forms
a
You should prevent unrolled wire mesh from recoiling by securing each end of the roll or __________. a. Turning the roll over b.Storing the roll vertically c.Using the wire mesh immediately d.Stacking the roll in a designated location
a
Masonry walls that are unsupported and more than what size must be braced? Select the correct answer and then click the DONE button. a.Six feet b.Eight feet c.Ten feet d.Four feet
b
The only workers allowed behind the jack when it is being used during post-tensioning operations are employees who __________. a.Have their OSHA 10-hour card b.Are essential to the jack operation c.Are wearing the proper personal protective equipment d.Are supervisors or project managers
b
What is the purpose of a pneumatic gate on a concrete bucket? Select the correct answer and then click DONE. a.To protect employees who are riding on the bucket b.To create a good safety latching system c.To add tension to the lift for greater efficiency d. To make it easier to dump the cement
b
When a jacking operation is taking place, which employees may remain inside the structure or building? Select the correct answer and then click the DONE button. a.Any company employees b.Employees who are essential to the jacking operation c.Registered professional engineers d. Employees who follow safe work practices
b
When is shoring and reshoring equipment required to be inspected? Select the correct answer and then click DONE. a.Only after it is erected b.Prior to, during, and after concrete placement c.Twice a month d.Annually
b
Which employees are allowed under the pre-cast concrete members while they are being lifted or tilted into position? Select the correct answer and then click DONE. a.Employees that have worked with concrete in the past b.Employees that are required for the setup c.Employees that are working on the same job site d.Supervisors
b
You are in charge of determining the route of a concrete bucket that will soon be loaded and elevated. Which route would be safest? Select the correct answer and then click DONE. a.Through an area where some coworkers are engaged in post-tensioning operations b.Through a cleared out section of the job site that will not be used for another two months c.Through the break area, since lunch is not for another hour d.Through an area where the project engineer is meeting with the foreman
b
A team member has told you he needs to climb on a concrete structure to do a task and that he is sure it can hold him. What should you tell him? Select the correct answer and then click DONE. a.Tell him to be sure to wear his safety equipment while he is on the structure. b.Tell him you are not sure it will hold him, but unfortunately, you don't see any other way to do the task. c.Tell him to check with the foreman to make sure the structure has been determined to be able to support a person of his weight. d.Tell him to be sure not to drop anything while he is up there.
c
Adequate bracing of masonry walls is especially important because they may be subject to __________. a.OSHA inspections b.Load bearing c.Wind loads d. Jacking operations
c
The minimum personal protective equipment is steel toed-shoes and __________. a.Rain gear b.Fall protection c. Hard hat d.Respirator
c
What must formwork for cast-in-place concrete be capable of supporting? Select the correct answer and then click DONE. a.All vertical loads that might be applied to it b. All lateral loads that might be applied to it c.All vertical and lateral loads that might be applied to it d. Specifically-requested vertical loads
c
You have successfully erected some cast-in-place concrete and remove the forms. You had the shoring equipment inspected before you began, but the latest inspection shows there is some damage to the equipment. What should you do? Select the correct answer and then click DONE. a.Put it aside until you can get the right parts to repair it. b.See if you can find some different equipment. c.Immediately reinforce the equipment so that it is in good working order. d. Use it for one more day, and then have it inspected again.
c
You notice there is some protruding reinforcing steel on the job site that workers could fall into. What should you do to protect workers from injury? Select the correct answer and then click DONE. a.Make sure all workers are wearing fall protection equipment. b.Tell workers not to come within 100 feet of the steel. c.Take steps to ensure the protruding steel is properly guarded. d.Inform the supervisor or project manager.
c
A construction load may not be placed on a concrete structure unless a person qualified in structural design has determined that the structure is: a. Temporary b.Able to pass inspection c.Accessible d.Able to support the load
d
What is the limited access zone? Select the correct answer and then click the DONE button. a.An area that is difficult for employees to access b.A part of the building that has been determined needs to be rebuilt c.A clearly defined area where only certain machinery is allowed d.A clearly defined area alongside a masonry wall that is under construction
d
What is the minimum personal protective equipment required when applying a cement, sand, and water mixture through a pneumatic hose? Select the correct answer and then click DONE. a.Protective head equipment b. Protective face equipment c.Steel-toed boots d.Protective head and face equipment
d
When is it a safe practice to work under concrete buckets while they are being raised or lowered into position? Select the correct answer then click DONE. a.When you are wearing a hard hat and steel-toed boots b. After you have informed your teammates c.After you have received proper training d. It is never a safe practice
d
You are using jacking equipment to raise a concrete slab that weighs 5 tons. The jacking equipment can support 10 tons. What is wrong with this scenario? Select the correct answer and then click the DONE button. a.The jacking equipment needs to be able to support 20 tons - four times the weight of the load. b.The jacking equipment needs to be able to support 15 tons - three times the weight of the load. c.The jacking equipment needs to be able to support the amount of the load. d.The jacking equipment needs to be able to support at least 12 ½ tons - two and a half times the weight of the load.
d
Your team is about to build a masonry wall that is 12 feet high, and you have created a limited access zone that is 14 feet around the length of the wall. Your supervisor pulls you aside. What did you do wrong? Select the correct answer and then click the DONE button. a.The limited access zone is not supposed to run the entire length of the wall, only a partial length. b. The limited access zone should be the same amount of feet as the wall, so 12 feet. c.You were not supposed to create the limited access zone until after construction began. d.The limited access zone is supposed to be the height of the wall plus four feet, so 16 feet.
d