1. Which of the following is another name of radius gauge?
a) Ring gauge
b) Planer gauge
c) Fillet gauge
d) Plug gauge
Explanation: Fillet gauge is another name of radius gauge. Fillet gauges are used to check the radius of an object. Radius gauges can also be used for inspection work
2. Why a radius is provided at the meeting point of two surfaces?
a) To reduce material
b) To avoid collision
c) To increase stability
d) To avoid stress concentration
Explanation: Sharp corners are subjected to more stress. So, to avoid stress concentration, radius is provided
3. Which of the following option is incorrect with respect to radius gauges?
a) Concave radius is an internal radius
b) Radius gauges are used for final inspection
c) If the curved surface is external then this radius is known as female radius
d) Radius gauges are suitable for both fillet and radius measurement
Explanation: If the curved surface is external then it is called male radius or simply radius. Term Female radius is used for internal curved surface.
4. Which of the following option is true for given statement?
Statement 1: For gauging the radius, a light source is used with radius gauge.
Statement 2: Pitch of the threads can be measured by radius gauge.
a) T, F
b) T, T
c) F, T
d) F, F
Explanation: A light source is used with radius gauges. Work is placed between light source and eye. It is the light passage due to which work can be gauged properly. To determine thread pitch, pitch screw gauge are used.
5. What is another name of blades of radius gauge?
a) Leaf
b) Petal
c) Cutter
d) Scale
Explanation: Each radius gauge has a number of blades. These blades are also known as leaves. Leaves can be used in any position to measure radius
6. Which of the following is not a type of radius gauge?
a) Acrylic
b) Guitar
c) Digital
d) Planer
Explanation: Planer gauge is a measuring instrument which is used to measure slot width and setting tool height. It has two triangular blocks whose sides can be clamped.
7. What is the measuring range for radius gauge?
a) 0.00075-0.025 m
b) 0.0075-0.5m
c) 0.075-5m
d) 0.75-5m
Explanation: Measuring range of radius gauge is generally 0.00075 to 0.025 meter. The blades are specially shaped and can be used to measure fillets and radius against shoulders or corners.
8. What is the use of feeler gauge?
a) To find the thickness of work piece
b) To measure the gap width
c) To check straightness
d) To check flatness
Explanation: Feeler gauges are used to measure gap width between two parallel faces e.g. finding clearance between two parallel surfaces
9. What is the tensile strength of blade of feeler gauge with thickness up to 0.5 mm?
a) 170 kgf/mm2
b) 270 kgf/mm2
c) 50 kgf/mm2
d) 70 kgf/mm2
Explanation: The blades of feeler gauges are made of heat treated tool steel. For thickness up to 0.5 mm, the tensile strength of blades is 170 kgf/mm2 and for 0.5 mm or above thickness it is 70 kgf/mm2.
10. Which of the following is incorrect about feeler gauge?
a) Feeler gauge can be used to check spark plug gaps
b) A Feeler gauge has number of blades of equal thickness
c) Blades are hinged in a sheath
d) Each thin blade is inter-leaved between two thick blades
Explanation: A feeler gauge is used to check gaps and clearance between two surfaces like spark plugs and tappet clearance. A feeler gauge has a number of blades of different grades and thicknesses. For maximum protection, blades are assembled in a protective sheath.