PCS Safety Procedures 3

Question 1

Which control is required on an abrasive blast nozzle so flow stops when the operator lets go?

Accepted Answer

Deadman control

Answer

A deadman control shuts off abrasive flow automatically if the operator releases the handle.

Question 2

What grade of breathing air is the minimum for supplied-air respirators under OSHA?

Accepted Answer

Grade D

Answer

OSHA 1910.134 requires compressed breathing air to meet at least CGA Grade D.

Question 3

An oil-lubricated compressor supplying blast helmets must have what safeguard?

Accepted Answer

A high-temperature alarm, CO alarm, or both

Answer

Oil-lubricated compressors can generate carbon monoxide, so high-temperature and/or CO alarms are required.

Question 4

What is the maximum carbon monoxide level allowed in Grade D breathing air?

Accepted Answer

10 ppm

Answer

Grade D breathing air may contain no more than 10 ppm carbon monoxide.

Question 5

What device prevents blast hose couplings from separating and whipping violently?

Accepted Answer

Whip checks and coupling safety pins

Answer

Whip checks and safety pins keep pressurized hoses secured if a coupling fails.

PCS - Protective Coatings Specialist Certification Practice Test