MHIC NASCLA CONTRACTORS EXAM 2
CONTRACT LAW, CODES & REGULATIONS
REVIEW 2026
◉ Who shall be allowed to operated a powder-actuated tool?
Answer: Only employees who have been trained in the operation of
the particular tool in used
◉ All employees using abrasive wheels shall be protected by?
Answer: Eye protection equipment
◉ Guarding, all portable, power-driven circular saws shall be
equipped with what? Answer: Guards above and below the base
plate or shoe. The upper guard shall cover the saw to the depth of
the teeth, except for the minimum arc required to permit the base to
be tilted for bevel cuts. The lower guard shall cover the saw to the
depth of the teeth, except for the minimum arc required to allow
proper retraction and contract with the work. When the tool is
withdrawn from the work, the lower guard shall automatically and
instantly return to the covering position.
◉ Valve protection caps shall not be used for lifting cylinders from
one vertical position to another. Answer: Bars shall not be used
under valves or valve protection caps to pry cylinders loose when
frozen. Warm, not boiling, water shall be used to thaw cylinder loose
,◉ How should compressed air be secured? Answer: In an upright
position at all times except, if necessary, for short periods of time
while cylinders are actually being hoisted or carried
◉ What distance shall Oxygen cylinders in storage be separated
from fuel-gas cylinders or combustible materials (especially oil or
grease)? Answer: A minimum distance of 20 ft (6.1m) or by non-
combustible barrier at least 5 ft (1.5m) high having fire-resistance
rating of a least one-half hour.
◉ Inside of buildings, how shall Gas cylinders be stored? Answer: In
a well protected, well-ventilated, dry location, at least 2 ft (6.1m)
from highly combustible materials such as oil or excelsior. Cylinders
should be stored in definitely assigned places away from elevators,
stairs, or gangways. Assigned storage places shall be located where
cylinders will not be knocked over or damaged by passing or falling
objects, or subject to tampering by unauthorized persons. Cylinders
shall not be kept in unventilated enclosures such as lockers and
cupboards.
◉ How shall a regulator to a cylinder valve be connected? Answer:
The valve shall be opened slightly and closed immediately. (The
action is generally termed "cracking" and is intended to clear the
valve of dust or dirt that might otherwise enter the regulator.) The
person cracking the valve shall stand to one side of the outlet, not in
front of it. The valve of fuel gas cylinder shall not be cracked where
,the gas would reach welding work, sparks, flame, or other possible
sources of ignition.
◉ All hose in use, carrying acetylene, oxygen, natural or
manufactured fuel gas, or any gas or substance which may ignite or
enter into combustion, or be in any way harmful to employees shall?
Answer: Be inspected at the beginning of each working shift.
Defective hose shall be removed from service.
◉ When the arc welder or cutter has occasion to leave his work or to
stop work for any appreciable length of time, or when the arc
welding or cutting machine is to be moved, what should happen?
Answer: The power supply switch to the equipment shall be opened.
◉ Lifelines. Where a welder must enter a confined space through a
manhole or other small opening, what should occur? Answer: Means
shall be provided for quickly removing him in case of emergency.
When safety belts and lifelines are used for this purpose they shall
be so attached to the welder's body that his body cannot be jammed
in a small exit opening. An attendant with a pre-planned rescue
procedure shall be stationed outside to observe the welder at all
times and be capable of putting rescue operations into effect.
◉ Working Clearances (voltage) Answer: 1. Nominal voltage to
ground, 0-150 = Minimum clear distance for conditions are 3 ft, 3ft,
3ft
, 2. Nominal voltage to ground, 151-600 = Minimum clear distance for
conditions are 3ft, 3.5ft, 4ft
◉ Minimum Depth of Clear Working Space in Front of Electrical
Equipment Answer: 1. Nominal voltage to ground, 601 to 2,500 =
Conditions 3ft, 4ft, 5ft
2. Nominal voltage to ground, 2,501 to 9,000 = Conditions 4ft, 5ft, 6ft
3. Nominal voltage to ground, 9,001 to 25,000 = Conditions 5ft, 6ft,
9ft
4. Nominal voltage to ground, 25,001 to 75kV = Conditions 6ft, 8ft,
10ft
5. Nominal voltage to ground, Above 75kV = Conditions 8ft, 10ft,
12ft
◉ Each scaffold and scaffold component shall be capable of support,
without failure, what? Answer: Its own weight and at least 4 times
the maximum intended load applied or transmitted too it
◉ Each scaffold unit shall be installed so that the space between
adjacent units and the space between the platform and the uprights
is? Answer: No more than 1 inc (2.5cm) wide, except where the
employer can demonstrate that a wider space is necessary (for
example, to fit around uprights when side brackets are used to
extend the width of the platform)
CONTRACT LAW, CODES & REGULATIONS
REVIEW 2026
◉ Who shall be allowed to operated a powder-actuated tool?
Answer: Only employees who have been trained in the operation of
the particular tool in used
◉ All employees using abrasive wheels shall be protected by?
Answer: Eye protection equipment
◉ Guarding, all portable, power-driven circular saws shall be
equipped with what? Answer: Guards above and below the base
plate or shoe. The upper guard shall cover the saw to the depth of
the teeth, except for the minimum arc required to permit the base to
be tilted for bevel cuts. The lower guard shall cover the saw to the
depth of the teeth, except for the minimum arc required to allow
proper retraction and contract with the work. When the tool is
withdrawn from the work, the lower guard shall automatically and
instantly return to the covering position.
◉ Valve protection caps shall not be used for lifting cylinders from
one vertical position to another. Answer: Bars shall not be used
under valves or valve protection caps to pry cylinders loose when
frozen. Warm, not boiling, water shall be used to thaw cylinder loose
,◉ How should compressed air be secured? Answer: In an upright
position at all times except, if necessary, for short periods of time
while cylinders are actually being hoisted or carried
◉ What distance shall Oxygen cylinders in storage be separated
from fuel-gas cylinders or combustible materials (especially oil or
grease)? Answer: A minimum distance of 20 ft (6.1m) or by non-
combustible barrier at least 5 ft (1.5m) high having fire-resistance
rating of a least one-half hour.
◉ Inside of buildings, how shall Gas cylinders be stored? Answer: In
a well protected, well-ventilated, dry location, at least 2 ft (6.1m)
from highly combustible materials such as oil or excelsior. Cylinders
should be stored in definitely assigned places away from elevators,
stairs, or gangways. Assigned storage places shall be located where
cylinders will not be knocked over or damaged by passing or falling
objects, or subject to tampering by unauthorized persons. Cylinders
shall not be kept in unventilated enclosures such as lockers and
cupboards.
◉ How shall a regulator to a cylinder valve be connected? Answer:
The valve shall be opened slightly and closed immediately. (The
action is generally termed "cracking" and is intended to clear the
valve of dust or dirt that might otherwise enter the regulator.) The
person cracking the valve shall stand to one side of the outlet, not in
front of it. The valve of fuel gas cylinder shall not be cracked where
,the gas would reach welding work, sparks, flame, or other possible
sources of ignition.
◉ All hose in use, carrying acetylene, oxygen, natural or
manufactured fuel gas, or any gas or substance which may ignite or
enter into combustion, or be in any way harmful to employees shall?
Answer: Be inspected at the beginning of each working shift.
Defective hose shall be removed from service.
◉ When the arc welder or cutter has occasion to leave his work or to
stop work for any appreciable length of time, or when the arc
welding or cutting machine is to be moved, what should happen?
Answer: The power supply switch to the equipment shall be opened.
◉ Lifelines. Where a welder must enter a confined space through a
manhole or other small opening, what should occur? Answer: Means
shall be provided for quickly removing him in case of emergency.
When safety belts and lifelines are used for this purpose they shall
be so attached to the welder's body that his body cannot be jammed
in a small exit opening. An attendant with a pre-planned rescue
procedure shall be stationed outside to observe the welder at all
times and be capable of putting rescue operations into effect.
◉ Working Clearances (voltage) Answer: 1. Nominal voltage to
ground, 0-150 = Minimum clear distance for conditions are 3 ft, 3ft,
3ft
, 2. Nominal voltage to ground, 151-600 = Minimum clear distance for
conditions are 3ft, 3.5ft, 4ft
◉ Minimum Depth of Clear Working Space in Front of Electrical
Equipment Answer: 1. Nominal voltage to ground, 601 to 2,500 =
Conditions 3ft, 4ft, 5ft
2. Nominal voltage to ground, 2,501 to 9,000 = Conditions 4ft, 5ft, 6ft
3. Nominal voltage to ground, 9,001 to 25,000 = Conditions 5ft, 6ft,
9ft
4. Nominal voltage to ground, 25,001 to 75kV = Conditions 6ft, 8ft,
10ft
5. Nominal voltage to ground, Above 75kV = Conditions 8ft, 10ft,
12ft
◉ Each scaffold and scaffold component shall be capable of support,
without failure, what? Answer: Its own weight and at least 4 times
the maximum intended load applied or transmitted too it
◉ Each scaffold unit shall be installed so that the space between
adjacent units and the space between the platform and the uprights
is? Answer: No more than 1 inc (2.5cm) wide, except where the
employer can demonstrate that a wider space is necessary (for
example, to fit around uprights when side brackets are used to
extend the width of the platform)
