CSS General Science & Ability Past Paper 2020
PART-2(Subjective) 80 Marks
SECTION-I
Q.2
(a) On 7th April 2012, an Avalanche hit a Pakistan military base in the Gayari sector, trapping 140 soldiers and civilians under deep snow. What is an avalanche? Describe its four types, focusing on the most dangerous type. (5)
(b) What do you understand by global wind and pressure patterns? Also, explain wind and pressure features at higher altitudes. (5)
(c) The world’s largest earthquake was assigned a magnitude of 9.5 by the United States Geological Survey on 22 May 1960 in southern Chile, Valdivia. What do you know about earthquakes? Also, explain shallow-focus and deep-focus earthquakes. (5)
(d) Differentiate between renewable and non-renewable energy sources. Briefly explain geothermal energy and hydroelectricity. (5)
Q.3
(a) What are pesticides? Explain their different types. Why are persistent pesticides more lethal for mankind? (5)
(b) What are carbohydrates? Classify them and give details of each class along with examples. (5)
(c) Discuss different methods of food preservation. (5)
(d) Where and how are fiber optics used? Also, write down their advantages and disadvantages. (5)
Q.4
(a) Briefly describe the various segments of the atmosphere. How do these segments maintain the Earth’s radiation balance? (5)
(b) How does organic particulate matter enter the atmosphere? Also, describe the sources. (5)
(c) What is natural radioactivity? How is it different from artificial radioactivity? (5)
(d) What are fossils? Discuss the importance of paleontology. (5)
Q.5
(a) What do you know about hepatitis? Describe its types and write down preventive measures. (5)
(b) Differentiate between middle-latitude cyclones and tornadoes. (5)
(c) What is Open System Interconnection (OSI) and describe its layers? (5)
(d) What is GPS? How does it work? (5)
SECTION-II
Q.6
(a) Tariq can do a tailoring job in 6 hours. Sajid does the same job in 4 hours. Irfan does it in 8 hours. Tariq and Sajid start doing the work. Sajid leaves after two hours, and Irfan replaces him. How long would it take to complete the work? (5)
(b) Find the missing number to complete each sum:
- (a) 9 + 8 – 5 = 2 × (————-)
- (b) 3 × 9 – 14 = 24 – (————-)
- (c) 15 ÷ 3 × 12 = 41 + (————-)
- (d) 24 ÷ 4 + 5 = 66 ÷ (————-)
- (e) 8 × 6 – 13 + 3 = 7 × 6 – (————-) (5)
(c) There are seven students in a group having ages 17, 17, 18, 18, 18, 19, 19. Calculate the mean, median, mode, and range of their ages. Also, define these terms. (5)
(d) How do mental ability scales differ from IQ tests? (5)
Q.7
(a) Mushtaq, Pervaiz, Ehsan, Umair, and Saleem are friends having different heights and weights. Mushtaq weighs four times as much as Pervaiz, and Pervaiz weighs double what Ehsan weighs. Ehsan weighs half as much as Umair, and Umair weighs half as much as Saleem.
- (i) Who is the heaviest among the five friends?
- (ii) Who is the second heaviest?
- (iii) Who has the lowest weight?
- (iv) Who are equal in weight?
- (v) Mention the descending order. (5)
(b) A farmer needs to build a boundary wall around his farm. If the area of the farm is 484 m², what will be the total area of the wall if it is two meters high on three sides and three meters high on one side? (5)
(c) Five girls A, B, C, D, E and four boys W, X, Y, Z have to go on a trip in three cars: car-1, car-2, and car-3. The following restrictions must be observed:
- (i) Only three persons can sit in one car.
- (ii) At least one boy and one girl must be in each car.
- (iii) A and D should remain together.
- (iv) Z cannot sit with B or C in the same car.
Distribute the boys and girls in the three cars. (5)
(d) What are social skills? Describe four causes of weak social skills. (5)
Q.8
(a) What do you understand by systematic sampling? Discuss its types. (5)
(b) Blood groups of inhabitants of a village were checked. It was found that 600 people possessed blood group A, 650 possessed blood group B, 550 had blood group AB, and 200 had blood group O. Calculate the probability of having blood group B. (ii) Calculate the probability of having blood group O. (5)
(c) A group of 50 men can construct a 20-kilometer road in 40 days. How long will 70 men take to complete the same length of road? (5)
(d) Zahid left a property worth Rs. 1,750,000. His family had to pay off a debt of Rs. 150,000. The rest of the money was distributed between his son and daughter. How much did each child receive if the share of the son was double that of the daughter? (5)