Fire Assay 1 Flashcards
Fire assay is considered as
a) volumetric method
b) gravimetric
c) gasometric
d) wet method
b
Gold is soluble in
a) Hcl
b) H2SO4
c) Hydroflouric acid
d) Aqua regia
d
Flour is used in assaying as
a) flux
b) oxidizing agent
c) reducing agent
d) combines with Pb
c
The step in assaying that forms the dore is
a) cuppellation
b) inquartation
c) partin
d) annealing
a
Soda ash is a powerful
a) acid flux
b) neutral reagent
c) basic flux
d) combines with SiO2 to form slag
c
This formula of iron oxide and silica FeO SiO2 is
a) monosilicate
b) bisilicate
c) subsilicate
d) sesquisilicate
b
In fision, process is assaying the reagent that enhance fluidity is
a) soda ash
b) litharge
c) SiO2
d) borax
a
The chiddy method is applicable in analyzing
a) cyanide
b) protective alkalinity
c) Au in cyanide solution
d) cyanicides
c
The artificial sulfide formed in the dry way in assaying is
a) speiss
b) matte
c) slag
d) button
b
An alloy sufficient in precious metals bearing economic significance is
a) bullion
b) dore
c) amalgam
d) button
a
The method of assaying carried out in a shallow clay dish by oxidizing fusion is called
a) wet analysis
b) scorification
c) qualitative analysis
d) solid solvent extraction
b
The assay of a gold bullion is expressed as
a) ppm
b) gm/MT
c) fineness
d) percent
c
Slag factor is
a) ratio of the weight of the mineral to SiO2
b) Quantified wt. of slag to be produced
c) ratio of the oxygen in the acid component
d) borax to silicon ratio in the charge
c
The element that causes frequent trouble in Ag assay is
a) Bi
b) Sb
c) Cu
d) Zn
a
The element that causes frequent trouble in Ag assay is
a) Bi
b) Sb
c) Cu
d) Zn
a
Slag in the process fusion becomes very viscous due to
a) insufficient finishing
b) insufficient fusion time
c) lacks acid fluxes
d) excess of SiO2
b
One purpose of charge calculation is to
a) control size of bottom
b) reduce the PbO
c) Produce a glassy slag
d) increase life of crucible
a
In assaying loaded carbon the oxidizing agent used in
a) Niter
b) Fe3O4
c) MnO
d) CaCO3
a
The reducing power of pyrite when soda ash is added is
a) increased
b) remained constant
c) lowered
d) reduced to neutral
a
An assay ton is
a) 20 gm
b) 29.199 gm
c) 26.93 gm
d) 30 gm
b
An inquart is added to
a) control the size of the button
b) establish as ideal silver to gold ratio to enhance parting
c) makes the reduced Pb malleable
d) makes the dore ductile
b
Silica is
a) basic flux
b) acid flux
c) neutral flux
d) borax to control size of button
b
For sulfide ores, we use
a) niter
b) flour
c) pyrite
d) borax to control size of button
a
The step where the Pb is oxidized is called
a) cuppellation
b) inquartation
c) parting
d) annealing
a
