Unit 4 Review Question/ General Safety Practice
A Class A fire extinguisher is to be used on which type of fire?
Paper
Which of the following refrigerant safety groups has the highest flammability and the highest toxicity?
B3
Which of the following statements is true regarding working on electrical circuits?
Be sure to use proper lock-out and tag-out procedures on all equipment.
Which of the following represents three pieces of personal protection equipment (PPE)?
Hard hats, ear plugs, work boots
Which organ is most likely to be affected by electric shock?
Heart
Which of the following statements is true regarding the use of nitrogen?
The nitrogen tank must be outfitted with a pressure regulator.
Which of the following can happen to a full nitrogen cylinder if the top is broken off?
The tank can become airborne
What can be done to prevent damaging the surroundings while soldering or brazing?
Use a heat shield
Which of the following is the safest acceptable method for moving a piece of heavy equipment across a smooth, flat roof?
Using pipe rollers
To prevent injury from leaking refrigerants, chemical vapors, or torch fumes, it is good field practice to
ensure adequate ventilation.
All of the following are true regarding first aid except
first aid is intended to be administered only by trained professionals.
The ground wire on most systems is commonly color-coded
green.
A confined space can be defined as an area or place that
is not intended for human occupancy.
When lifting a heavy object by yourself, make certain that you
lift with your legs.
If an extension ladder is used to access the roof of a 10-foot high building, the base of the ladder should be approximately how many feet from the building?
2.5 feet
How far above the landing surface should an extension ladder extend?
3 feet
If a compressor motor experiences a burnout, which of the following can be produced?
Acid
When working around rotating machinery, which of the following is true?
Allow all rotating equipment to come to a complete stop before servicing.
What can happen when oil is mixed with oxygen under pressure?
An explosion can occur
Which of the following tasks could potentially subject a service technician to frostbite?
Connecting or removing a service hose from a liquid-line service port
Which of the following factors will most directly deter-mine the severity of an electric shock?
Current flow through the victim
With respect to fire extinguishers, the acronym PASS stands for
Pull, Aim, Squeeze, Sweep
What should be done before using chemicals to clean a dirty evaporator coil?
Read the label on the chemical container
When electric current flows through the body, which of the following injuries will commonly result?
Shocks and burns
To help remain safe on the job, it is always recommended that field personnel
be aware of all potential hazards around them.