313D Safety and Regulations Questions and Answers

Question 1

A technician servicing a residential split system needs to replace a leaking Schrader core on the suction line.
They briefly vent a small amount of R-410A refrigerant to the atmosphere before replacing the core.
According to Canadian federal and provincial regulations, what is the status of this action?

Accepted Answer

It is a violation of regulations, as any intentional venting of HFC refrigerants is prohibited.

Answer

It is permissible as a 'de minimis' release necessary for service.

Answer

It is allowed only for certified technicians during emergency repairs.

Answer

It is acceptable as long as it is documented in the service log and is under 50 grams.

Question 2

Before replacing a faulty blower motor in a residential air handler, which of the following represents the most critical and complete safety procedure?

Accepted Answer

Isolate, lock out, and tag the circuit breaker controlling the air handler.

Answer

Turn off the thermostat and pull the outdoor disconnect.

Answer

Wear insulated gloves and use non-conductive tools.

Answer

Turn off the circuit breaker for the air handler at the main electrical panel.

Question 3

While preparing to use a new coil cleaning chemical, a technician observes a WHMIS 2015 pictogram on the label that features a skull and crossbones. What specific hazard does this symbol represent?

Accepted Answer

Acute toxicity (fatal or toxic with short exposure)

Answer

Biohazardous infectious material

Answer

Corrosive damage to skin or metals

Answer

Flammable or combustible material

Question 4

A technician is transporting a 30 lb cylinder of R-410A and a recovery cylinder in their work van. According to Canada's Transportation of Dangerous Goods (TDG) Regulations, which of the following is a mandatory requirement?

Accepted Answer

The cylinders must be secured in an upright position.

Answer

The vehicle must display a Class 2.2 placard for any amount.

Answer

A full shipping document is required for a single cylinder.

Answer

The cylinders must be kept in a climate-controlled compartment.

Question 5

When connecting refrigerant gauges to a pressurized residential air conditioning system, what is the minimum Personal Protective Equipment (PPE) a technician must wear to protect against the most immediate hazards?

Accepted Answer

Safety glasses with side shields and gloves

Answer

A hard hat and steel-toed boots

Answer

A respirator with organic vapor cartridges

Answer

A long-sleeved cotton shirt and hearing protection

Question 6

In which of the following installation locations is a secondary drain pan with a float switch or separate drain line required by the Ontario Building Code?

Accepted Answer

In an attic or above a finished ceiling where overflow could cause damage.

Answer

In a basement, if the floor is unfinished concrete.

Answer

For all horizontal air handler installations.

Answer

When the condensing unit is installed on a flat roof.