A.center drill
B.finish drill
C.broach
D.reamer
您可能感興趣的試卷
你可能感興趣的試題
A.Mill
B.Round
C.Square
D.Triangular
A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning
A.safe for becoming rounded
B.safe for hot work
C.not safe for personnel
D.not safe for hot work
A.checking the area for items that may catch fire
B.that a fire watch be posted
C.checking for the explosive gases
D.all of the above
A.Flash point improvers
B.Pour point improvers
C.Inhibitors
D.Foam suppressors
最新試題
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
The shipboard oil pollution emergency plan will be invalid after （）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
Diesel engine air start system check valves are opened by （）
（） is not installed on the main switchboar.
The treatment of the fuel oils involves storage, heating, filtering and（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）