All Test Data Pakistan: KRL

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Wednesday, July 10, 2019

KRL Sample Questions for Mechanical Engineering

Instructions:

• Write your full name and all other information asked at the top of this page and at the Answer sheet
provided.
• Encircle the letters A, B, C or D in the Answer Sheet corresponding to the correct answer from the
given options
• Each correct answer carries THREE marks while ONE mark will be deducted for each incorrect
answer.
• Use of any external paper for rough work is not allowed. Carry out your rough work somewhere in
the question paper. DO NOT use any side of the answer sheet for rough work.
• More than one answers for a single question will be considered as INCORRECT
• Fill the answer sheet carefully. Avoid overwriting and/or cutting in the answer sheet.
• Exchange of anything is not allowed during the examination
• STOP WRITING IMMEDIATELY when you are asked to do so
• KEEP YOUR MOBILE PHONES OFF AND POCKETED. USE OF MOBILE PHONE AS
CALCULATOR IS ALSO NOT ALLOWED.

• Be sure that you have got all the pages of your paper with 80 questions in all.

Sample Paper (MECHANICAL)

1. In a wind tunnel, the flow speeds (of air) on the upper and lower surfaces of the wing of a model airplane are v1and v2 respectively (v1> v2). If the wing area is A and the density of air is ρ, the lift on the wing is

(A) ρ (v12–v22)A

(B) 1⁄2 ρ (v1 –v2)A

(D) 1⁄2 (v12–v22)A/ρ

2. Oil has a kinematic viscosity of 1.25×10-04 m2/s and a specific gravity of 0.8. What is dynamic (absolute) the viscosity of the oil?

(A) 0.08kg/m-

(B) 0.10kg/m-

(D) 1 kg/m-s

3. Inflow through a straight, smooth pipe, the diameter Reynolds number for the transition to turbulence is generally

taken to be

(A) 1500 (B) 2300 (C) 250,000 (D) 4000

4. Consider a liquid with density ρ, viscosity μ and velocity V flowing over a very small dam spillway of length L, such that surface tension coefficient σ is very important. The quantity 2 ρV L σ, in this case, is important and is called

(A) Weber number (B) Froude number

5. Minor losses through pipes, fitting, bend, etc. are commonly modeled as proportional to:

(A) Velocity Head

(B) Static Head

(D) Pressure Drop

6. What is the hydraulic diameter of the rectangular air conditioning duct whose cross-section is 1 m by 25 cm?

(A) 40 cm (B) 50 cm (C) 75 cm (D) 100 cm

7. Stress intensity factor ‘KI’, has the following relationship with the crack length ‘a’ in a material

(A) KI α a

(B) KI α a

(D) KI α a2

8. The figure shows a pin-jointed plane truss loaded at the point M by hanging a mass of 100 kg. The member LN of the truss is subjected to a load of?

(A) 0 Newton

(B) 490 Newton in compression

(D) 981 Newton in tension

9. The automobile exhaust will have a maximum of hydrocarbons when the vehicle is

(A) Idling (B) Cruising (C) Decelerating (D) Accelerating

10. The efficiency of vapor power Rankine cycle can be increased by

i. Increasing the temperature of the working fluid at which heat is supplied

ii. Increasing the pressure of the working fluid at which heat is supplied

iii. Decreasing the temperature of the working fluid at which heat is rejected

Which of the above statements is/are correct?

(A) i alone (B) ii and iii (C) i, ii and iii (D) i and ii

KRL Sample Questions for Civil Engineering

Instructions that will be given on Paper:

• Write your full name and all other information asked at the top of this page and at the Answer sheet provided.

• Encircle the letters A, B, C or D in the Answer Sheet corresponding to the correct answer from the given options

• Each correct answer carries THREE marks while ONE mark will be deducted for each incorrect answer.
• Use of any external paper for rough work is not allowed. Carry out your rough work somewhere in the question paper. DO NOT use any side of the answer sheet for rough work.
• More than one answers for a single question will be considered as INCORRECT
• Fill the answer sheet carefully. Avoid overwriting and/or cutting in the answer sheet.
• Exchange of anything is not allowed during the examination
• STOP WRITING IMMEDIATELY when you are asked to do so
• KEEP YOUR MOBILE PHONES OFF AND POCKETED. USE OF MOBILE PHONE AS CALCULATOR IS ALSO NOT ALLOWED.
• Be sure that you have got all the pages of your paper with 80 questions in all.

Sample Paper (CIVIL)

1. In a two hinged arch, an increase in temperature induces

(A) No bending moment in the arch rib

(B) Uniform bending moment in the arch rib

(D) The minimum bending moment at the crown

2. Poisson’s Ratio for Concrete is approximately

(A) 0.625 (B) 0.534 (C) 1.325 (D) none of

these

3. The field of mechanics concerned with the study of the propagation of cracks in materials is known as

(A) Statics (B) Dynamics

4. Which of the following Test fall in the category of Non-Destructive Testing?

(A) X-ray (B) Laser Ultrasonics

5. From a nozzle exposed to the atmosphere the liquid jet traverses:

(A) Straight path (B) Parabolic path

6. Soils exhibit strain-dependent dynamic properties so that an earthquake strong shaking increases, soil shear modulus

(A) increases (B) decreases

7. The ratio of the tensile stress developed in the walls of a boiler in the circumferential direction to the tensile stress in the axial direction is

(A) 4 (B) 3 (C) 2 (D) 1

8. The point of contra flexure occurs in

(A) cantilever beam only (B) continuous beam only

9. A rectangular beam 20cm wide is subjected to the maximum shearing force of 10,000 kg, the corresponding maximum shearing stress being 30 kg/cm2. The depth of the beam is

(A) 15 cm (B) 20 cm (C) 25 cm (D) 30 cm

10. To a cyclist riding west at 20 kg/hr, the rain appears to meet him at an angle of 45° with the vertical. When he rides at 12 km/hr, the rain meets him at an angle of 19°48’ with the vertical. The actual direction of the rain is

(A) 13° (B) 21° (C) 31° (D) 70°

KRL Sample Questions for Computer Engineering

Sample Paper (Computer Engineering)

1. The CPU structure contains:

a. Cache, ALU, Control Unit and Control Memory

b. System Bus, ALU, Control Unit and Registers

c. Memory, ALU, Control Unit and Cache

d. Registers, ALU, Internal CPU Interconnection and Control Unit

2. Normally, the FPGA resources are used less than 70% because:

a. Routing becomes excessively complicated

b. Power issues

c. Clock frequency

d. Simulation time increases

3. In which layer Telnet and FTP work?

a. Application

b. Session

c. Network

4. If b=2'b10 and c={2'b01,{b,b}}, then:

a. c = 6'b011010;

b. c = 6'b101010;

c. c = 6'b111111;

d. c = 6'b001100;

5. Which of the I/O structure steals memory cycles from CPU and slows down CPU execution during its operation?

a. Synchronous

b. Asynchronous

c. Direct Memory access

d. Symmetric

6. A binary image is encoded using run length code row by row, with “0” represents white, and “1” represents black. What will be code for row 10 in the diagram given below?

a. “0”, 7, 2, 7

b. “1”, 3, 10, 3

c. “0”, 2, 1, 10, 1, 2

d. “0”, 3, 2, 6, 3, 2

7. What is represented by the question mark symbol?

a. –

b. +

c. /

d. ×

8. Which protocol works at the Internet layer and provides a connection service between hosts?

a. IP

b. ARP

c. TCP

d. UDP

9. How long does it take to send a file of 640,000 bits from host A to host B over a circuit‐switched

network?

➤All links are 1.536 Mbps

➤ Each link uses TDM with 24 slots/sec

➤500 msec to establish end‐to‐end circuit

a. 7.5 sec

b. 8.5 sec

c. 9.5 sec

d. 10.5 sec

10. Which of the following function prototype is perfectly acceptable?

a. int Function(int Tmp = Show());

b.float Function(int Tmp = Show(int, float));

c. Both A and B.

d.float = Show(int, float) Function(Tmp);

11. Which of the following are valid calls to Math.max?

1. Math.max(1,4)

2. Math.max(2.3, 5)

3. Math.max(1, 3, 5, 7)

4. Math.max(‐1.5, ‐2.8f)

a. 1, 2 and 4

b.2, 3 and 4

c. 1, 2 and 3

d. 3 and 4

12. What will be the output of the program?

String x = new String("xyz");

String y = "abc";

x = x + y;

How many String objects have been created?

a. 2

b. 3

c.4

d.5

Feel free to comment any query/Answers and the past paper you want for preparation.

KRL Sample Questions For Electrical/Electronics

Sample Paper (General)

1. The Laplace transform of e–2t is

(A) 0.5 s (B) 2/(s+1) (C) 1/(s+2) (D) 2/(s+2)

2. Tanθ in the accompanying diagram is

(A) y/(y+2x)

(B) x/(y+x)

(D) y/x

3. By a chord of the curve y = x3, we mean any line joining two distinct points on it. The number of chords which have slope 1 is

(A) infinite (B) 0 (C) 1 (D) 2

4. The absolute temperature for an ideal gas is

(A) directly proportional to the rotational K.E. of gas molecules

(B) directly proportional to vibrational K.E of gas molecules

(D) directly proportional to the P.E of the gas molecules

5. An engineer claims, with some thermodynamic analysis, that if the proposed construction site of a Nuclear power plant is changed from one city to another, Plant efficiency will increase (cost of construction and everything else is same). Does the change of city have to do anything with a thermodynamic efficiency of the plant?

(A) No

(B) Yes

(D) Yes, but only if population difference is negligible

6. A banana has twice the calories than an apple has. Also, a hamburger has 1.5 times as many calories as a banana.

Therefore,

(A) A hamburger has as many calories as one apple

(B) A hamburger has 2 times as many calories as one apple

(D) A hamburger has 4 times as many calories as one apple

7. Three pipes A, B and C can fill a tank in 10, 12 and 15 minutes respectively. First A was opened. After one minute B was opened and after two minutes from the start of A, C was opened. Find the time in which the tank is just full.

(A) 4 min,52 sec (B) 3 min (C) 3 min,52 sec (D) 4 min, 06 sec

8. Which number in the series should come next?

-1 0 1 8

(A) 15 (B) 20 (C) 25 (D) 27

9. The pressure P units and the volume V m3 of a quantity of gas stored at a constant temperature are related by pv=k. At a certain time, the volume of gas in the cylinder is 30 m3 and pressure is 20 units. If the gas is being compressed at the rate of 6m3 /sec, at what rate is the pressure changing?

(A) 4units/s increasing (B) 6 units/s increasing

10. The manager ---------- everyone go home an hour early on Friday afternoon.

A) allowed

B) let

C) permitted

D) got

Sample Paper (ELECTRICAL)

1. A sinusoidal voltage with equation Vm=sin 314 t is applied across a load and the current lags behind the voltage

by 30 degrees. Which of the following is NOT correct?

(A) The load is inductive in nature

(B) No power will be consumed in the circuit

(D) The power factor of the circuit will have a value of less than 1.0

2. Which of the following is not the function of transformer oil?

(A) Cooling the primary coil (B) Cooling the secondary coil

3. Overvoltage transient may occur in a transmission line due to

(A) Lightning (B) Switching

4. Which of the following statements is not correct for a purely inductive circuit?

(A) The power factor of the circuit is zero

(B) The power consumed in the circuit is zero

(D) All of the above statements are true for a purely inductive circuit

5. A transmitting aerial is radiating un-modulated carrier, the radiated power is 1200 W. If the carrier is now modulated simultaneously by two pure notes to a depth of 20% and 40% respectively, the total power radiated will now be

(A) 1320 W (B) 1200 W (C) 1180 W (D) 920 W

6. If the e.m.f. in the rotor of a three pole induction motor has a frequency of 1.5 Hz and that in the stator is 50 Hz. What is the speed at which the motor is running?

(A) 750 rpm

(B) 744 rpm

(D) 713.5 rpm

7. Which method of starting an induction motor is expected to take the largest starting current.

(A) Direct on-line starting

(B) Stator rotor starting

(D) Auto-transformer starting

8. The back e.m.f. set up in the stator of a synchronous motor will depend upon

(A) Rotor speed only

(B) Rotor excitation only

(D) Coupling angle, rotor speed, and excitation

9. An alternator is generating power at 210 V per phase while running at 1500 rpm. If the speed of an alternator

drops to 1000 rpm the generated voltage per phase will be

(A) 180 V

(B) 150 V

(D) 105 V

10. The driving power from the prime mover driving the alternator is lost but the alternator remains connected to the supply network and the field supply also remains on. The alternator will

(A) Get itself burnt

(B) Behave as an induction motor but will rotate in the opposite direction

(D) Behave as a synchronous motor but will rotate in a reverse direction to that

corresponding to generator action

Sample Paper (ELECTRONICS)

1. A diode that has a negative resistance characteristic is the

(A) Schottky diode (B) PIN diode

2. A given BJT has a beta (β) rating of 400, the value of alpha (α) for this device is;

(A) 1.0025 (B) 0.0025

3. For positive logic following is an ⇨⇨⇨⇨

(A) NAND Gate (B) AND Gate

4. In a Darlington pair configuration, each transistor has an ac beta of 125. If RE is 560Ω, the input resistance is;

(A) 560 Ω (B) 70 kΩ

5. The number of poles in a filter affects the

(A) voltage gain (B) bandwidth

6. The unit of magnetic charge is

(A) Amperes (B) Ampere-meter

7. A Wein bridge oscillator has R1=R2=220 KΩ, and C1=C2=250pF, The frequency of oscillation will be

nearly;

(A) 0.89 kHz (B) 1.89 kHz

8. To calibrate a pressure transmitter, with a range of 0 psi to 600 psi, to 0.02% of reading accuracy, which of the following test equipment would be best suited for the calibration?

(A) Precision dial gage. (B) Precision dead weight tester.

9. A certain fiber-optic cable has the following characteristics: n1 = 1.82 and n2 = 1.73. What is the value of

θc?

(A) 1.0o

(B) 0.95o

(D) 18.1o

10. 8086 is a 16-bit microprocessor having;

(A) 4-bit data bus (B) 8-bit data bus