1. A universal measuring instrument can withstand up to which temperature for correct reading?
a) 100oC
b) 75oC
c) 65oC
d) 50oC
Explanation: Display unit can withstand temperature up to 50oC and 95% relative humidity.
2. Which of the following option is correct for given statements about universal measuring instrument?
Statement 1: There is a rack and pinion movement in measuring slide.
Statement 2: An independent power supply unit is screwed to the base.
a) Only statement 1 is true
b) Only statement 2 is true
c) Both the statements are true
d) Both the statements are not true
Explanation: There is no rack and pinion movement or backlash in EDU. It is completely independent and interchangeable. A power supply unit is screwed with 4 screws to the base
3. What is the range of voltage fluctuations which can be taken care by an electronic unit in universal measuring instrument?
a) 18% to 20%
b) -10% to +50%
c) -18% to +20%
d) 10% to 50%
Explanation: An interrupted power supply is provided to the electronic unit by power supply unit. It takes cares from – 18 to +20% fluctuations of voltage.
4. Which of the following is incorrect about bench micrometer?
a) Anvil retractor device
b) High precision micrometer head
c) Non-adjustable work table
d) Interchangeable dial indicator
Explanation: Work table is adjustable and an accurate alignment of work is provided by adjusting the table. For repeated measurements, anvil retractor device is present.
5.Up to which comparator measurements, dial indicator of bench micrometer can be used?
a) 1 micron
b) 2 micron
c) 3 micron
d) 4 micron
Explanation: A super precision dial indicator is used for comparator measurement. Micrometer head is also highly précised with direct readings in 25 mm units.
6. What is the range of comparator in bench micrometer with dial comparator?
a) ±50 µm
b) ±100 µm
c) ±150 µm
d) ±200 µm
Explanation: Range of bench micrometer and comparator in bench micrometer with dial comparator is 0-25 mm and ±50 µm respectively.
7. What is the accuracy deviation of dial comparator bench micrometer when setting with gauge block?
a) ≤2 µm
b) ≥2 µm
c) ≤1 µm
d) ≥1 µm
Explanation: Use of gauge block increase accuracy of bench micrometer and its accuracy deviation is less than or equal to 1 µm
8. Which of the following option is correct for given statements about dial comparator bench micrometer?
Statement 1: Moving parts are of satin chrome finish.
Statement 2: Extra large thimble is present.
a) T, F
b) F, T
c) T, T
d) F, F
Explanation: For easy and fast measurement, moving parts and scale are satin chromed finished. Thimble is large so that graduations are widely spaced
9. What is the thimble diameter in dial comparator bench micrometer?
a) 5 mm
b) 10 mm
c) 20 mm
d) 30 mm
Explanation: Thimble diameter is large so that graduations can be read easily. Its diameter is about 30 mm.
10. Which of the following is correct about dial comparator bench micrometer?
a) Not ideal for small precision parts
b) Immovable anvil
c) Small thimble
d) Non rotating spindle
Explanation: Anvil can be movable. It is mounted on a long guide way. Micrometer screw contains a non- rotating spindle which is precisely grounded