1. What is the suitable material for small plain plug gauges?
a) Any type of steel
b) Light metal alloys
c) Non-metallic handles may be used
d) Aluminum
Explanation: Suitable wear resisting steel is used to make gauging members of plain plug gauges. For heavy plain plug gauges, handle made of light metal alloys are used. For small plain plug gauges, suitable non-metallic handles may be used.
2. What is the colour of the band at ‘no go’ side of plain gauges?
a) Red
b) Blue
c) Green
d) Yellow
Explanation: To identify which end of the gauge is ‘No Go’ or ‘Go’ end, sometimes ‘No Go’ side is painted with red colour. Otherwise, the work ‘Go’ and ‘No Go’ are written on the handle of ‘Go’ and ‘No Go’ side respectively.
3. What is the range of size that can be checked by double-ended Rib type snap gauges?
a) 1 mm to 10 mm
b) 10 mm to 20 mm
c) 20 mm to 50 mm
d) 3 mm to 100 mm
Explanation: It is convenient to use double ended type rib snap gauges to check sizes of 3 mm to 100 mm. For size, 100 to 250 mm single ended progressive type snap gauges are used. Gauging surface are hardened up to 720 HV. Other surfaces are of smooth finish.
4. Which of the following option is correct regarding anvils of ‘adjustable type gap gauges’?
a) Gauging anvil has only sliding movement
b) Gauging anvil has only rotating movement
c) Gauging anvil has both sliding and rotating movement
d) Anvils are of non-adjustable type
Explanation: In adjustable type gap gauges, gauging anvils are adjustable endwise in the horse shoe frame. The gauging anvils of adjustable type snap gauges have only sliding movement that is no rotating movement for adjustment. A sufficient distance should be present between ‘Go’ and ‘No Go’ anvil.
5. Which principle is related to Gauge design?
a) Rankin principle
b) Position principle
c) Taylor’s principle
d) Carnot Principle
Explanation: According to Taylor’s principle, “‘No Go’ and ‘Go’ gauges are designed to check the minimum and maximum material limits”. In gauge design, simplicity is the main aim as simple gauge can take measurements accurately and continuously.
6. ‘Go limit’ applied to which limit condition?
a) Maximum material limit
b) Minimum material limit
c) Lower limit of shaft and upper limit of hole
d) Moderate material limit
Explanation: ‘Go’ limit is applied to the limit corresponds to maximum material limit condition that is lower limit of hole and upper limit of shaft while ‘No Go’ limit is applied to minimum material condition that is upper limit of a hole and lower limit of a shaft.
7. Which of the following is incorrect for the gauging faces of snap gauges?
a) Parallel to each other
b) Square to each other
c) Gauging point and work are in same plane
d) Work and gauging faces are at 60 degree
Explanation: Gauging faces of a gap and snap gauges are square and parallel to each other. If gauging diameter of component is larger than gap setting then it will produce welding action may lead to distortion in gauge are incorrect interpretation of reading.
8. What is the effect of wear on the size of ‘Go’ snap gauges?
a) Decrease
b) Increase
c) May increase or decrease
d) No effect
Explanation: Due to wear, size of ‘Go’ plug gauge decreased while size of ‘Go’ snap gauge is increased. Absolute accurate gauge can’t be made by gauge makers. So, it is important to assign some deviation to gauges.
9. What is the use of ‘No Go’ gauges?
a) Check a single element of a feature
b) Check several dimensions simultaneously
c) Check roundness and size at the same time
d) Check location and size at the same time
Explanation: ‘No Go’ gauge should check only one feature at a time. A separate ‘No Go’ gauge is needed for each different individual dimension. ‘Go gauges’ are complex gauges can check several related dimensions simultaneously.
10. Which deviations are provided to a new ‘Go’ plug gauge from the nominal size?
a) One positive deviation
b) One negative deviation
c) Two positive deviations
d) Two negative deviations
Explanation: A new ‘Go’ snap gauge is made with two negative deviations while a new ‘Go’ plug gauge is made with two positive deviations from the nominal size.