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Subject Category > General Knowledge

Q. Which one of the following types of laser is used in laser printers?

A) Dye laser

B) Semiconductor laser

C) Excimer laser

D) Gas laser

✔ Semiconductor laser

Additional Information > Exam point of View

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Asked Question

Q 1.The LCM of two numbers is 2310 and HCF is 30. If one of the numbers is 210, then what is the other number?

Right Answer : 330

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Q 2.In a 30 litre mixture of milk and water, the ratio of milk and water is 7:3. How much water should be added in the mixture so that the ratio of milk and water becomes 3:7?

Right Answer : 40

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Q 3.A and B can together do a work in 6 days. A can do it alone in 9 days. In how many days can B do it alone?

Right Answer : 18 days

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Q 4.The average marks obtained by 120 students in an exam is 35. If the average marks obtained by successful students is 39 and the average marks obtained by unsuccessful students is 15 then what is the number of successful students?

Right Answer : 100

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Q 5.A train travels from A to B at the speed of 20 km./hr. and from B to A at the speed of 30 km./hr. Then what is the average speed of train in km./hr.?

Right Answer : 24 km./hr

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Q 6.There is a loss of 12 percent on an article being sold for Rs. 352.88, then the cost price of the article is

Right Answer : Rs. 401

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Q 7.National Income estimates in India are prepared by

Right Answer : Central statistical organisation

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Q 8.MS-Word is an example of _____

Right Answer : Application software

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Q 9.The staple food of the Vedic Aryan was

Right Answer : Milk and its products

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Q 10.Ctrl, Shift and Alt are called .......... keys.

Right Answer : modifier

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