BGAS Grade 2/3 Model Multiple Choice question & answers - Part 5

 101.     What is the Minimum Number of readings required for a dial micrometer?

a)         Minimum of 101

b)         Minimum of twelve

c)         One only

d)         As many as you wish, but the average reading must be measured

 

102.     Transparent layer in replica tape is ____________

a)         Milar

b)         Mylex

c)         Mylar

d)         Testex

 

103.     When checking surface profiled using X-Course replica tape :

a)         50 microns must be added to the final reading

b)         The average Number of readings must be taken

c)         50 microns must be deducted from the reading

d)         A minimum of ten readings must be taken.

 

104.     ______________ not suitable for profile measurement.

a)         Dial micrometer

b)         Surface profile needle gauge

c)         Surface comparator

d)         Corn plasters method

 

105.     What is the main advantage of using Testex papers for surface profile measurement?

a)         It also measures cleanliness

b)         Most accurate over a large area

c)         Easy to use

d)         Permanent record

 

106.     When using replica tape 50µm deducted because _________

a)         Thickness of paper

b)         Thickness of transparent layer

c)         Thickness of Testex

d)         Dial micrometer Criteria

 

107.     Coarse grade for measuring profile range is

a)         30-50 µm

b)         37-115µm

c)         20-50 µm

d)         30-75 µm

 

108.     Extra Coarse grade for measuring profile range is

a)         30-50 µm

b)         37-115 µm(38-115µm)

c)         20-50 µm

d)         30-75 µm

 

109.     1000 µm =

a)         1cm

b)         1mm

c)         10mm

d)         0.1mm 

110.     1mill (thou) =

a)         24.5 microns

b)         25.4 mm

c)         25.4 microns

d)         24.4 mm

 

111.     Dial position gives the Number of complete full revolutions of needle gauge on the scale

a)         2 µm scale is 100µm

b)         5 µm scale is 500µm

c)         2 µm scale is 200 µm

d)         5 µm scale is 250µm

112.     Assess the roughness

a)         Naked eye

b)         Visual aid

c)         Tactile

d)         All of the above

 

113.     Size of comparators diameter hole in the middle

a)         4 cm square with 2 cm

b)         8 cm square with 2 cm

c)         6 cm square with 2 cm 

d)         10 cm square with 3 cm

 

114.     Any profile below the lower limit for fine grading is referred to
a)         Coarser than fine
b)         Coarser than Coarse
c)         Finer than fine
d)         Finer than Coarse

115.     Any profile above the upper limit for fine grading is referred to
a)         Coarser than fine
b)         Coarser than Coarse
c)         Finer than fine
d)         Finer than Coarse

 

                116.   Preparation of steel substrate before application of paints and related products

a)          BS 7079 Pt C

b)         BS 7079 Pt. A

c)          BS 7079 Pt B

d)         BS 7079 Pt D

 

    117.     Rust Grade A can be described as

a)     Tightly adhering Mill scale, with evident heavy pitting

b)     Clean white metal

c)     Tightly adhering Mill scale, with no apparent corrosion

d)     Mill scale which has begun to flake, or can be scraped away

 

    118.     Rust Grade B can be described as

a)          Tightly adhering Mill scale, with evident heavy pitting

b)         Clean white metal

c)          Tightly adhering Mill scale, with no apparent corrosion

d)         Mill scale which has begun to flake, or can be scraped away

119.     Rust Grade C can be described as

a)           Tightly adhering mill scale, this can be brushed clean

b)          Loosely adhering mill scale, with no evident pitting

c)           Mill scale almost totally removed, visible rust, slight pitting

d)         Heavy pitting visible, heavy corrosion

120.     Rust Grade D can be described as

a)     Tightly adhering Mill scale, with evident heavy pitting

b)     Mill scale rusted away, general pitting, clear visible.

c)     Tightly adhering Mill scale, with no apparent corrosion

d)     Mill scale which has begun to flake, or can be scraped away

121.     Corrosion begins on the metal and mill scale begins of flake away?

a)     Rust Grade A

b)     Rust Grade B

c)     Rust Grade C

d)     Rust Grade D

122.        Thorough Blast Cleaning

a)            poorly adhering mill scale, rust

b)            most of the mill scale, rust and residual contamination shall be firmly adhering

c)            mill scale, rust, slight stains in the form of spots or stripes

d)            free from mill scale, have a uniform metallic colour

 

123.        Very Thorough Blast Cleaning

a)            poorly adhering mill scale, rust

b)            most of the mill scale, rust and residual contamination shall be firmly adhering

c)            mill scale, rust, slight stains in the form of spots or stripes

d)            free from mill scale, have a uniform metallic colour

 

124.        Blast cleaning to visually clean steel

a)            poorly adhering mill scale, rust

b)            most of the mill scale, rust and residual contamination shall be firmly adhering

c)            mill scale, rust, slight stains in the form of spots or stripes

d)            free from mill scale, have a uniform metallic colour

 

125.        Which blasting Grade best describes light blast cleaning?

a)            Sa 2

b)            Sa 21/2

c)            Sa3

d)            Sa1