686: Which one of the following types of glass can cut off ultraviolet rays ?
(a) pyrex glass
(b) Soda glass
(c) Crookes glass
(d) Jena glass
687: Who was the second President of the Indian Republic?
(a) Dr. Zakir Hussain
(b) Dr. S. Radhakrishnan
(c) Dr. Rajendra Prasad
(d) V. V Giri
688: At which place Gautama Buddha delivered his first sermon?
(a) Sarnath
(b) Lumbini
(c) Bodh Gaya
(d) Vaishali
689: Assertion (A):
Emperor Akbar marched towards Afghanistan in 1581 with a huge army.
Reason (R):
He was on his way to reclaim his ancestral country of Ferghana in Central Asia.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
690: A conveyer belt delivers baggage at the rate of 3 tons in 5 minutes, and a second conveyer belt delivers baggage at the rate of 1 ton in 2 minutes. How much time will it take to get 33 tons of baggage delivered using both the conveyer belts ?
(a) 25 minutes and 30 seconds
(b) 30 minutes
(c) 35 minutes
(d) 40 minutes and 45 seconds