Machinist – 1st YEAR – Module 2 : Basic Fitting – 2. Drilling and Taper
Questions: Level 1
1 What is the least count of vernier height gauge?
A 0.001 mm
B 0.002 mm
C 0.005 mm
D 0.02 mm
2 What is the name of the part marked as ‘x’ in the height gauge shown?
A Main scale
B Main slide
C Jan clamp
D Vernier scale
3 What is the part shown as ‘x’ in the figure?
A Main scale
B Vernier scale
C Beam
D Main slide
4 How we specify a vernier height gauge?
A Width of beam
B Height of beam
C Thickness of beam
D Size of base
5 What is the term in BIS limits fits to mention the size with dimensional durations?
A Size
B Basic size
C Actual size
D Maximum size
6 What is the formula for finding maximum limit size in BIS system?
A Maximum limit = Basic size + Upper deviation
B Maximum limit = Basic size + Lower deviation
C Maximum limit = Upper deviation – Basic size
D Maximum limit = Lower deviation – Basic size
7 What is the definition of ‘tolerance’ in BIS system?
A Difference between basic size & actual size
B Algebraic difference between maximum limit & basic size
C Difference between maximum limit & minimum limit
D Algebraic difference between minimum limit & basic size
8 Which fundamental deviation symbol indicate shaft basis system?
A H
B h
C P
D j
9 What is mean by ‘upper deviation’ in BIS system of limits & fits?
A Maximum size of a component
B Minimum size of a component
C Algebraic difference between maximum limit & minimum limit
D Algebraic difference between maximum limit & basic size
10 Which size will represent the zero line in limit terminology?
A Basic size
B Actual size
C Minimum size
D Maximum size
11 What is the meaning of ‘H’ in the drawing?
A Basic size
B Tolerance
C Fundamental tolerance
D Fundamental deviation of hole
12 What is the fundamental deviation of dimension φ 25H7?
A 7
B H
C H7
D 25
13 What is the definition of fits?
A Maximum size of a dimension
B Minimum size of a dimension
C Permissible deviation of a dimension
D Relationship that exist between two mating parts
14 Which type of fit is obtain of the hole is bigger than the shaft?
A Tight fit
B Transition fit
C Clearance fit
D Interference fit
15 Which type of fit is indicated in figure?
A Tight fit
B Transition fit
C Clearance fit
D Interference fit
16 What type of fit is shown in figure?
A Tight fit
B Transition fit
C Clearance fit
D Interference fit
17 What is the maximum size of the hole can be drilled by sensitive drilling machine?
A 1.25 mm
B 12.5 mm
C 25 mm
D 12.5 cm
18 What is the point angle of drill for drilling mild steel?
A 80°
B 90°
C 1180
D 1200
19 What is the name of the angle marked ’X’?
A Helix angle
B Point angle
C Chisel angle
D Lip clearance angle
20. What is the formula to find out RPM of drill ?
21 How many numbers are in metric tap set?
A 1
B 2
C 3
D 4
22 What is the name of the part marked as ’X’?
A Lip
B Tang
C Heel
D Flute
23 What is the name of the part marked as ’X’?
A Lip
B Tang
C Heel
D Flute
24 What the is name of the cone shaped end of a drill?
A Tang
B Flute
C Point
D Margin
25 What is the name of the driving end which is fitted on the machine?
A Lip
B Heel
C Flute
D Shank
26 What is the name of the portion of a drill between the point and the shank?
A Tang
B Body
C Land
D Flute
27 Which portion of drill the flutes are cut?
A Body
B Tang
C Point
D Shank
28 Which part of drill forms the cutting edge?
A Body
B Land
C Point
D Flutes
29 What is the name of the part marked ‘X’?
A Web
B Land
C Flute
D Dead centre
30 What is the formula to find tap drill size in general purpose?
A Major dia meter minus pitch
B Major dia meter minus 3 x pitch
C Major dia meter minus 2 x pitch
D Major dia meter minus 1/2 x pitch
31 What is mass production ?
A Producing work in pairs
B Producing a work in single piece
C Producing an work in large numbers
D Producing an work in limited numbers
32 Which system of limits and fits are followed in our country?
A BIS system
B DIN system
C BSS system
D FPS system
33 Which term used to indicate external dimension of a componend in BIS system of limits & fits?
A Hole
B Shaft
C Deviation
D Tolerance
34 What is meant by ‘Lower deviation’ in BIS system?
A Algebraic difference between maximum limit and basic size
B Algebraic difference between minimum limit and basic size
C Algebraic difference between maximum limit and minimum limit
D Algebraic difference between basic size and upper deviation
35 How many fundamental deviation are in BIS system.
A 12
B 18
C 20
D 25
36 How many grades of tolerances are represented in BIS system?
A 12
B 15
C 18
D 25
37 Which fundamental deviation symbol indicate ‘Hole basis’ system?
A h
B H
C P
D j