18 questions

Safety

What must every employer have under the Construction Safety Orders?

  • a.A Cal/OSHA inspector on site
  • b.An injury and illness program✓
  • c.A union safety committee
  • d.A full-time safety engineer

Every employer must establish, implement and maintain an effective Injury and Illness Prevention Program.Cal. Code Regs. tit. 8, 1509

Safety

Who may operate equipment and machinery on a construction site?

  • a.Anyone the owner approves
  • b.Any licensed driver
  • c.Only qualified persons✓
  • d.Any employee over 18

The employer may permit only qualified persons to operate equipment and machinery.Cal. Code Regs. tit. 8, 1510

Safety

On a site with several employers, who must ensure first-aid availability for each employer's workers?

  • a.The local fire department
  • b.Each employer✓
  • c.Only the property owner
  • d.Only the general contractor

Each employer is responsible for emergency medical services for its employees, though employers may agree to share a program.Cal. Code Regs. tit. 8, 1512

Safety

A personal fall arrest system must limit the worker's deceleration distance to what?

  • a.10 feet
  • b.1 foot
  • c.3.5 feet✓
  • d.6 feet

The system must stop the worker within a maximum deceleration distance of 3.5 feet; free fall is limited to 6 feet.Cal. Code Regs. tit. 8, 1670

Safety

Where is a guardrail's midrail placed?

  • a.Halfway down to the floor✓
  • b.One foot below the top rail
  • c.At the floor level
  • d.At the top rail's height

A midrail is halfway between the top rail and the floor, platform, runway or ramp.Cal. Code Regs. tit. 8, 1620

Safety

Which overhead line clearance table governs boom-type equipment?

  • a.The local utility's handbook only
  • b.Neither; booms have no limit
  • c.Table 2✓
  • d.Table 1

Boom-type lifting or hoisting equipment and material storage use the Table 2 clearances; Table 1 gives general clearances.Cal. Code Regs. tit. 8, 2946

Safety

What minimum clearance does Table 2 of section 2946 require for a boom near a 69 kV line?

  • a.10 feet
  • b.6 feet
  • c.13 feet
  • d.11 feet✓

Table 2 requires 11 feet for over 50,000 to 75,000 volts; 10 feet is the 600 to 50,000-volt row and 13 feet the next row up.Cal. Code Regs. tit. 8, 2946

Safety

A haulage vehicle's backup alarm must be audible from how far?

  • a.500 feet
  • b.50 feet
  • c.200 feet✓
  • d.100 feet

The warning sound must normally be audible from 200 feet and sound immediately on backing.Cal. Code Regs. tit. 8, 1592

Safety

An operator must step off a moving dozer to talk to a laborer. What does Cal/OSHA say?

  • a.Allowed at walking speed
  • b.Not while it is moving✓
  • c.Allowed with a spotter
  • d.Allowed on level ground only

The operator of any vehicle may not leave the controls while it is moving under its own engine power.Cal. Code Regs. tit. 8, 1592

Safety

What is the merging taper for a 10-foot lane closure at 30 mph?

  • a.150 feet✓
  • b.50 feet
  • c.90 feet
  • d.300 feet

At 40 mph or less, L = W × S² ÷ 60 = 10 × 900 ÷ 60 = 150 feet.CA MUTCD 2026, Ch. 6B

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Safety

What is the merging taper for an 11-foot lane closure at 55 mph?

  • a.505 feet
  • b.275 feet
  • c.605 feet✓
  • d.555 feet

At 45 mph or more, L = W × S = 11 × 55 = 605 feet.CA MUTCD 2026, Ch. 6B

Safety

On a rural highway, how far ahead should the first warning sign typically be, in feet?

  • a.Exactly 100 feet
  • b.8 to 12 times the speed limit✓
  • c.2 to 4 times the speed limit
  • d.Half a mile in every case

Rural highways call for the first warning sign at 8 to 12 times the speed limit in feet; urban streets use 4 to 8 times.CA MUTCD 2026, Ch. 6B

Safety

At night, what must be true of a STOP/SLOW paddle?

  • a.It is held below waist level
  • b.It is replaced by a red flag
  • c.It is used without a staff
  • d.It is retroreflectorized✓

When used at night the STOP/SLOW paddle is retroreflectorized, and flagger stations are illuminated.CA MUTCD 2026, Ch. 6D

Safety

A worker takes a preventative cool-down rest in the shade. What must the employer do?

  • a.Order the worker back within 5 minutes
  • b.Send the worker home
  • c.Monitor the worker for heat symptoms✓
  • d.Dock the rest from pay

A worker on a cool-down rest is monitored and asked about symptoms, encouraged to stay in the shade, and not ordered back until symptoms abate.Cal. Code Regs. tit. 8, 3395

Safety

When is protective footwear required?

  • a.Where objects can fall or crush✓
  • b.Only when it rains
  • c.Only for equipment operators
  • d.Only on sites over 5 acres

Foot protection is required where employees are exposed to falling objects, crushing or penetrating actions, electrical hazards or hot, corrosive or poisonous substances.Cal. Code Regs. tit. 8, 3385

Safety

Below what exposure level does the construction silica standard not apply, if exposure will stay there under any foreseeable conditions?

  • a.10 micrograms per cubic meter
  • b.100 micrograms per cubic meter
  • c.50 micrograms per cubic meter
  • d.25 micrograms per cubic meter✓

The standard applies unless exposure will remain below 25 µg/m³ as an 8-hour average under any foreseeable conditions; the PEL is 50.Cal. Code Regs. tit. 8, 1532.3

Safety

Which atmosphere is hazardous under the construction confined-space definitions?

  • a.Oxygen at 21 percent
  • b.Oxygen at 20 percent
  • c.Oxygen at 20.9 percent
  • d.Oxygen at 24 percent✓

Oxygen below 19.5 percent or above 23.5 percent is a hazardous atmosphere; 24 percent is oxygen-enriched.Cal. Code Regs. tit. 8, 1951

Safety

A new employee asks where the product information for a curing compound is. What must be readily accessible on each shift?

  • a.The purchase order
  • b.The safety data sheet✓
  • c.The concrete mix design
  • d.The supplier's catalog

Safety data sheets must be readily accessible during each work shift to employees in their work areas.Cal. Code Regs. tit. 8, 5194

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