PAEC (Pakistan Atomic Energy Commission) TEST SAMPLE A
PAKISTAN ATOMIC ENERGY COMMISSION
ENTRANCE TEST FOR POSTGRADUATE TRAINING SAMPLE
TEST A
1. Which number should come next? 1 5 17 37 ______
A) 63
B) 64
C) 65
D) 66
E) 67
2. Stationary point at curve y = x 2 is x = __________________
A) 0
B) 1
C) 2
D) 2 x
E) Can’t be determined with the given data
3. Choose the lettered word or phrase that is the most nearly Opposite in meaning to the word in capital letters:
ENDORSE:
A) provoke criticism
B) receive payment
C) submit unwillingly
D) oppose publicly
E) perform quickly
4. An elliptical field has its major axis equal to 10 km and minor axis equal to 8 km.
If some one is interested to place a rope around the field at a distance of 100 m
from the periphery of the ellipse, how long rope will he approximately need?
A) 28.78 km
B) 38.44 km
C) 35.25 km
D) 57.56 km
E) Not enough data to approximate
5. If y = 1 / ( x + 2 ), then Inverse Function f -1(y):
A) 1 / (x – 2)
B) (2 / x) -1
C) (1 / y) - 2
D) (2 / y) -1
E) None of above
6. Hydrogen gas is contained at 20 degrees Celsius in a rigid cylinder having a
volume of 10 litres. Which of the following figures is an approximation of the
pressure in Mega Pascal which is being exerted on the walls of the cylinder?
A) 0.101
B) 0.24
C) 101
D) 24
E) Not enough data to have an idea
7. The nucleus of an atom with atomic number 92 and atomic mass number
238 emits an α- rays. What will be the atomic number and the atomic mass
number of the new nucleus formed?
A) 92 and 238
B) 94 and 240
C) 90 and 236
D) 90 and 234
E) No new nucleus is formed in this process
8. 6C11 and 5B11 are two
A) isotopes
B) isobars
C) isotones
D) isomers
E) None of the above
9. Log 9 100 is
A) greater than 0 and less than 1
B) greater than 1 and less than 2
C) greater than 2 and less than 3
D) greater than 3 and less than 4
E) greater than 4 and less than 5
10. In the diagram, lengths are shown in centimeters. What is area in square centimeters of the unshaded part of this rectangle
A) 84
B) 168
C) 49
D) 35
E) 126
11. A palindromic number is a whole number that reads the same both ways
(for examples 28482). How many palindromic numbers are there between 150 and 250
A) 9
B) 10
C) 99
D) 90
E) 100
12. If f(x) = 5 + 2x then f(f(x)) is
A) (5 + 2x )2
B) 15 + 4x
C) 5
D) 5x
E) 2
13. For what value of x is it true that (x – 3)^-1 < 1/3 ?
A) All values of x ¼
B) All values of x except 3 ≤ x ≤ 6
C) All values of x greater than 3
D) All values of x less than 6
E) All values of x greater than 6
14. Given that Sin(𝚹) = –3.2, to which of the following statements do you agree
A) The given mathematical sentence is wrong because Sin(𝚹) can never have a negative value
B) The mathematical sentence is wrong because Sin(𝚹) can never have a value less than –1 or greater than +1
C) The mathematical sentence is wrong because Sin(𝚹) has always a value greater than +1
D) The mathematical sentence is wrong because Sin(𝚹) has always an integer value
E) The mathematical sentence is correct
15. Twenty people at a gathering shook hands with each other (once). The number of hand shakes which took place was
A) 190
B) 19
C) 400
D) 380
E) 40
16. A sixteen players’ squad was announced by cricket council in which a captain,
four batsmen and three bowlers were permanent members of the team.
How many possibilities are there to select a team of eleven players in such a condition?
A) 8
B) 16
C) 24
D) 40
E) 56
17. If X = A t + B t2 where X is in meters and t is in hours, the unit of A will be
A) m2/hr
B) m/hr2
C) m/hr
D) m
E) hr
18. A constant force of 100N is being tangentially applied on a flywheel of a
machine which rotates at constant angular speed of 9420 radians per second.
The radius of the flywheel is 0.5 meter. What is the torque acting on the flywheel?
A) 100 Nm
B) 0.5 Nm
C) 50 Nm
D) 5 Nm
E) Torque is not defined for rotating objects.
19. Which of the following country is not a member of SAARC
A) Maldives
B) Bhutan
C) Myanmar
D) Nepal
E) Srilanka
20. Oil is leaking from an oil tanker at a rate of 300 cm3/s. The oil forms an
expanding circular pool, 5mm deep around the tanker. How fast is the radius
of the circle changing when the radius is 100 cm?
A) 3 cm/s
B) /3 cm/s
C) 3/ cm/s
D) 3 cm/s
E) cm/s
21. A meltdown has occurred at a nuclear reactor. The intensity of the radiation, I,
is related to S, the distance in kilometers from the reactor according to the equation
I = 100/S2 If a person upon hearing about the disaster gets in his car and drives at
80 km/hr away from the reactor, how far is I changing when S=20 km?
A) – 2 units/hr
B) – 4 units/hr
C) – 6 units/hr
D) – 8 units/hr
E) – 9.34 units/hr
22. Estimate mean head in meters of a hydroelectric generation station in which
surface of a reservoir 4000 m2 in extent falls by 30 cm when 75 kWh is developed
in the turbine. The efficiency of the turbine is 70%. Neglect fractional losses of
water flow and assume density of water to be 1000 kg/m3.
A) 48.3 m
B) 39.4 m
C) 32.8 m
D) 27.6 m
E) 22.1 m
23. Nasima had a number of cookies. After eating one, she gave half the number to
her sister. After eating another cookie, she gave half of what was left to her brother.
Nasima has now only five cookies left. How many cookies did she start with?
A) 11
B) 22
C) 23
D) 45
E) 46
24.A spaceship received three messages in a strange language from a distant
planet. The astronauts studied these messages and found that “Elros Aldarion
Elendil” means “Danger Rocket Explosion” and “Edain Mnyatur Elros” means
“Danger Spaceship Fire” and “Aldarion Gimilzor Gondor” means
“Bad Gas Explosion”.What does “Elendil” mean?
A) Danger
B) Explosion
C) Nothing
D) Rocket
E) Gas
25. pH value of a solution was measured as 5, pOH of the solution will be
A) 11
B) 7
C) 9
D) 3
E) None of the above
26. Falling drops of rain acquire spherical shape on account of
A) Temperature
B) Viscosity
C) Compressibility
D) Surface tension
E) None of the above
27. The bulk modulus of elasticity for a liquid
A) Is independent of temperature
B) Increases with the pressure
C) Has the dimensions of the volume
D) Is independent of pressure
E) None of the above
28. According to Newton’s Law of cooling (provided the difference of
temperature is small), the rate of heat transfer is proportional to
A) The excess temperature
B) The square of the excess temperature
C) The cube of the excess temperature
D) The forth power of the excess temperature
E) None of the above
29. The Prandtl number (Npr) is defined as
A) Cр μ/ρ
B) k Cр/μ
C) Cр μ/k
D) Cр ρ/k
E) None of the above
30. Formaldehyde is manufactured by
A) Catalytic oxidation of ethylene
B) Catalytic oxidation-dehydrogenation of methanol
C) Catalytic dehydrogenation of propylene oxide
D) Catalytic dehydrogenation of formaldehyde
E) None of the above
31. Which of the following varieties of coal has the highest carbon content?
A) Peat
B) Lignite
C) Bituminous
D) Anthracite
E) None of the above
32. Sodium carbonate is manufactured by ammonia-soda process. The process is called
A) Bosch process
B) Langmuir process
C) Solvay process
D) Haber’s process
E) None of the above
33. The dew point of an unsaturated mixture of water vapour and air at constant temperature and pressure
A) Does not change with change in absolute humidity
B) Increases with increase in absolute humidity
C) Decreases with increase in absolute humidity
D) Decrease linearly with increase in absolute humidity
E) None of the above
34. For all useful liquid-liquid extraction operations the selectivity of solvent must be
A) More than zero
B) More than one
C) Less than one
D) Less than or equal to one
E) None of the above
35. When can the relative humidity of air decrease in spite of an increase in the absolute humidity?
A) When the pressure rises
B) When the pressure falls
C) When the temperature rises
D) When the temperature falls
E) None of the above
36. Select the correct statement. Under the same conditions
A) 1 m3 of dry air is lighter than 1 m3 of humid air
B) 1 m3 of humid air is lighter than 1 m3 of dry air
C) Both 1 m3 of dry air and 1 m3 humid air have the same weight.
D) Cannot be determined
E) None of the above
37. An azeotropic mixture of two liquids has boiling point lower than either of them when it
A) Shows no deviation from Raoult’s law
B) Shows positive deviation from Raolt’s law
C) Shows negative deviation from Raolt’s law
D) Is saturated
E) None of the above
38. The reaction 2NO+ O2 2NO2 is
A) First order reaction
B) Second order reaction
C) Third order reaction
D) Fractional order reaction
E) None of the above
39. Which of the following is an example of a closed system?
A) Scooter engine
B) Liquid cooling system of an automobile
C) Boiler in steam power plant
D) Air compressor
E) None of the above
40. Kinetic viscosity has the dimensions.
A) M-1 L-1 T-1
B) L2 T-1
C) L-2 T
D) MLT-2
E) None of the above
41. Which of the following is an intensive property?
A) Internal energy
B) Enthalpy
C) Density
D) Volume
E) None of the above
42. How many cubic foot of oxygen is required for the complete and perfect combustion
of one cubic foot of methane?
A) One cubic foot
B) Two cubic foot
C) One and half cubic foot
D) Three cubic foot
E) None of the above
43. Fuel combustion is never 100% efficient due to
A) Incomplete combustion loss
B) Dry gas loss, or stack loss
C) Moisture loss, unaccountable loss
D) All these answers
E) None of the above
44. Austenitic stainless steel is characterized by
A) A body-centred cubic crystal structure
B) A face-centred cubic crystal structure
C) A simple hexagonal crystal structure
D) All of the above
E) None of the above
45. The presence of impurities in Iron
A) Lowers the melting point
B) Raises the melting point
C) Has no effect on melting point
D) Make Iron malleable
E) None of the above
46. The rate constant for a first-order reaction
A) Depends on the unit of time
B) Has units of reciprocal of time
C) Does not change on changing the concentration units
D) All of the above
E) None of the above
47. The laplace transform of cos kt is
A) k/(s2-k2)
B) s/(s2+k2)
C) k(s2+k2)
D) δ(s2-k2)
E) None of the above
48. For a reversible isobaric process the exponent ” n” in the relation PVn = constant,
has the value
A) n = 1
B) n = 0
C) n =
D) n = γ
E) None of the above
49. In the Haber’s process for the manufacture of ammonia
A) Finely divided iron is used as a catalyst
B) Finely divided molybdenum is used as a catalyst
C) Finely divided nickel is used as a catalyst
D) No catalyst is required
E) None of the above
50. In all real (irreversible) processes the available energy of an isolated system
A) Increases
B) Decreases
C) Remains constant
D) May increase or decrease
E) None of the above
ANSWER SHEET OF TEST A
Q. 1 C Q. 26 D
Q. 2 A Q. 27 B
Q. 3 D Q. 28 A
Q. 4 A Q. 29 C
Q. 5 C Q. 30 B
Q. 6 E Q. 31 D
Q. 7 D Q. 32 C
Q. 8 B Q. 33 B
Q. 9 C Q. 34 B
Q. 10 E Q. 35 C
Q. 11 B Q. 36 B
Q. 12 B Q. 37 B
Q. 13 E Q. 38 C
Q. 14 B Q. 39 B
Q. 15 A Q. 40 B
Q. 16 E Q. 41 C
Q. 17 C Q. 42 C
Q. 18 C Q. 43 A
Q. 19 C Q. 44 B
Q. 20 C Q. 45 B
Q. 21 A Q. 46 D
Q. 22 B Q. 47 B
Q. 23 C Q. 48 B
Q. 24 D Q. 49 A
Q. 25 C Q. 50 B
Comments
Post a Comment