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This quiz contains multiple-choice problems on screw threads, bolt and nut locking arrangements, nuts and washers.
As per standards, the chamfer angle for hexagonal and square nuts is __ degrees.
30
45
60
15
The angle through which the spanner will have to be turned to get the next hold is __ degrees in case of hexagonal shape.
90
60
30
45
The width across the flats in case of hexagonal nut is __, where D is the diameter of the shank.
2D
1.5D +3mm
1.4D
1.5D
The distance across diagonally opposite corners in the case of hexagonal nut is __, where D is the nominal diameter.
2D
1.5D +3mm
1.4D
1.5D
What is the nut's name, a cap nut with a spherical dome on top?
Dome nut
Wing nut
Flanged nut
Cap nut
What is the nut's name, a hexagonal nut provided with a cylindrical cap?
Dome nut
Wing nut
Flanged nut
Cap nut
What is the nut's name, a hexagonal nut with a washer?
Dome nut
Wing nut
Flanged nut
Cap nut
What is the nut's name that the thumb and a finger can easily operate?
Ring nut
Wing nut
Cap nut
Flanged nut
What is the nut's name, which is in the form of a ring provided with slots in the curved surface for c-spanner?
Ring nut
Wing nut
Capstan nut
Flanged nut
What is the thickness of washer when the nominal diameter of bolt is D?
0.12D
0.1D
D
0.09D
What is the outer diameter of washer when the nominal diameter of a bolt is 5 mm?
13 mm
15 mm
10 mm
12 mm
Which of the following is not a reason for arranging locking nuts?
To get rid of slack while vibrations in machines
To get rid from the loosing of connected parts
For more protection and security
To get rid of screwing off the bolts
Lock-nut or check-nut is chamfered at
Upper side
Lower side
Both sides
No sides
The diameter of the hole in which the split pin is to be put is __ when D is the diameter of bolt.
0.12D
0.2D
0.3D
0.4D
A hexagonal nut with a slot cut halfway across it, and a cap screw is passed through the clear hole in the upper to lower part. The name of the nut is
Simmond’s locknut
Penn nut
Castle nut
Sawn nut or Wiles nut
