1
OSHA 510 EXAM 2025/2026 115 QUESTIONS
WITH ANSWERS LATEST UPDATED
ALREADY GRADED A
OSHA defines an excavation as any __ cut, cavity, trench, or depression in the
earth's surface formed by earth removal - CORRECT ANSWER>>man-made
At trench is defined as a narrow underground excavation that is __ than it is wide
- CORRECT ANSWER>>deeper
A trench cannot be wider than - CORRECT ANSWER>>15 feet
Cave-in protection is required for all excavations greater than - CORRECT
ANSWER>>5 feet in depth unless they are entirely in sold stable rock
A ladder must be provided every - CORRECT ANSWER>>25 feet for excavations
greater than 4 feet in depth
Spoil piles, material and equipment must be kept - CORRECT ANSWER>>2 feet
from the excavation
Excavation inspections must be conducted - CORRECT ANSWER>>DAILY and
before start of work
Excavation inspections must be conducted to determine - CORRECT
ANSWER>>soil classification
For all trenches deeper than 5 feet, OSHA requires what to protect workers
from cave-in? - CORRECT ANSWER>>a. sloping b. shoring
c. benching
d. shielding
, 2
Stable rock - CORRECT ANSWER>>natural solid mineral material than can be
excavated with vertical sides
Type A: cohesive soils with an unconfined compressive strength of __ tons per
square foot - CORRECT ANSWER>>1.5 tons
Type B: cohesive soils with an unconfined compressive strength greater than __
tsf but less than __ tsf - CORRECT ANSWER>>0.5; 1.5
Type C: cohesive soils with an unconfined compressive strength of __ tsf or less -
CORRECT ANSWER>>0.5 tsf
Type A can be sloped at a ratio of __ if the excavation will be open for less than 24
hours and is less than 12 feet in depth - CORRECT ANSWER>>1/2 : 1
Any excavation more than __ feet in depth requires a qualified person to design
the protection - CORRECT ANSWER>>20 feet
The classification of soil shall be made based on the results of at least one visual
and one __ analysis conducted by a competent person - CORRECT
ANSWER>>manual
The best method to prevent injuries is to _____. - CORRECT ANSWER>>prevent
the hazard
The second best way to prevent injuries is to _____. - CORRECT
ANSWER>>eliminate the hazard
The third best way to prevent an injury is to _____. - CORRECT ANSWER>>control
exposure
The preferred method to control exposure is _____. - CORRECT
ANSWER>>engineering
OSHA 510 EXAM 2025/2026 115 QUESTIONS
WITH ANSWERS LATEST UPDATED
ALREADY GRADED A
OSHA defines an excavation as any __ cut, cavity, trench, or depression in the
earth's surface formed by earth removal - CORRECT ANSWER>>man-made
At trench is defined as a narrow underground excavation that is __ than it is wide
- CORRECT ANSWER>>deeper
A trench cannot be wider than - CORRECT ANSWER>>15 feet
Cave-in protection is required for all excavations greater than - CORRECT
ANSWER>>5 feet in depth unless they are entirely in sold stable rock
A ladder must be provided every - CORRECT ANSWER>>25 feet for excavations
greater than 4 feet in depth
Spoil piles, material and equipment must be kept - CORRECT ANSWER>>2 feet
from the excavation
Excavation inspections must be conducted - CORRECT ANSWER>>DAILY and
before start of work
Excavation inspections must be conducted to determine - CORRECT
ANSWER>>soil classification
For all trenches deeper than 5 feet, OSHA requires what to protect workers
from cave-in? - CORRECT ANSWER>>a. sloping b. shoring
c. benching
d. shielding
, 2
Stable rock - CORRECT ANSWER>>natural solid mineral material than can be
excavated with vertical sides
Type A: cohesive soils with an unconfined compressive strength of __ tons per
square foot - CORRECT ANSWER>>1.5 tons
Type B: cohesive soils with an unconfined compressive strength greater than __
tsf but less than __ tsf - CORRECT ANSWER>>0.5; 1.5
Type C: cohesive soils with an unconfined compressive strength of __ tsf or less -
CORRECT ANSWER>>0.5 tsf
Type A can be sloped at a ratio of __ if the excavation will be open for less than 24
hours and is less than 12 feet in depth - CORRECT ANSWER>>1/2 : 1
Any excavation more than __ feet in depth requires a qualified person to design
the protection - CORRECT ANSWER>>20 feet
The classification of soil shall be made based on the results of at least one visual
and one __ analysis conducted by a competent person - CORRECT
ANSWER>>manual
The best method to prevent injuries is to _____. - CORRECT ANSWER>>prevent
the hazard
The second best way to prevent injuries is to _____. - CORRECT
ANSWER>>eliminate the hazard
The third best way to prevent an injury is to _____. - CORRECT ANSWER>>control
exposure
The preferred method to control exposure is _____. - CORRECT
ANSWER>>engineering
