CHST Exam Practice Questions
The Construction Health and Safety Technician exam, commonly known as the CHST exam, is a comprehensive and challenging assessment for men and women looking to enter this challenging field of practice. The content of this assessment can be broken down into the following categories: project management, worksite auditing, training, and professional responsibility.
1. What load can a 2-inch hydraulic cylinder used as part of a shoring system safely support?
A. 10,000 pounds
B. 18,000 pounds
C. 23,000 pounds
D. 30,000 pounds
2. For a scaffolding system to safely hold two 200-pound workers and 50 pounds of equipment, how much weight must the scaffolding planks and suspension ropes be capable of holding?
A. The planks must hold 1,800 pounds, and the suspension ropes must hold 2,700 pounds
B. Both the planks and suspension ropes must hold 1,800 pounds
C. Both the planks and suspension ropes must hold 2,700 pounds
D. The planks must hold 2,700 pounds, and the suspension ropes must hold 1,800 pounds
3. If a crane is used to hoist workers, the angle between the base of the crane and the ground must not exceed
A. 5 percent
B. 2 percent
C. 1 percent
D. 0.5 percent
4. In order to identify the general characteristics of a chemical hazard, a CHST should have a working knowledge of a chemical’s
C. CAS number
D. All of the above
5. If a substance has a TLV-STEL rating, the exposure limit for workers is
A. The amount a worker can be exposed to the substance during an eight-hour day and 40-hour workweek
B. 15 minutes twice a day
C. 15 minutes four times a day
D. No exposure is allowed
1. B: According to OSHA regulations in 1926 Subpart B, 2-inch hydraulic cylinders can support 18,000 pounds, while 3-inch cylinders can support 30,000 pounds.
2. A: Scaffolding and planking must support at least four times the expected maximum load, while suspension ropes must support at least six times the expected maximum load.
3. C: If a crane is used to hoist workers, the angle between the base of the crane and the ground must not exceed 1 percent. In addition, the total weight of the personnel and personnel platform must be less than 50 percent of the crane’s capacity, and all brakes and locking devices on the crane must be engaged when the personnel platform stops. A crane should be used to hoist workers only when more conventional means, such as ladders and scaffolding, are not feasible.
4. D: All of this information will help a CHST identify and evaluate a chemical hazard. CFR, or Code of Federal Regulations, lists all the rules and regulations developed by the federal government, including those dealing with chemical hazards. The CAS number is a unique number assigned to each organic and inorganic chemical substance.
5. C: TLV stands for Threshold Limit Value and STEL stands for Short-Term Exposure Limit. Workers can be exposed to these substances for only 15 minutes at a time four times a day. In addition, there must be a 60-minute interval between exposures.