ECAT - University of Engineering and Technology (UET) Lahore 2015 Past Paper with Answers

Practice the ECAT - University of Engineering and Technology (UET) Lahore 2015 past paper with 61 solved MCQs, answers and topic coverage.

61 solved MCQs across 1 approved paper

Eccentricity is less than 1 for:Answer: Ellipse A themistor with negative temperature co-efficient is placed in a furnace. When temperature of furnace increases the resistance?Answer: Decreases Reception of particular radio station selected by tuning the tuning knob of radio tuning the tuning knob changes the?Answer: Capacitance AC voltage is passed through single diode rectifier, the output of the bridge rectifier is?Answer: Double frequency AC voltage In amplitude modulation, the amplitude of carrier wave changes proportion to:Answer: The amplitude of the modulating signal As the water falls from the tap, the cross sectional area should decrease according to?Answer: Equation of continuity Density of oxygen is about 16 times that of hydrogen. Therefore if speed of hydrogen is “x” then speed of oxygen:Answer: Greater than x A police motor cycle running at 140 km/hr. the apparent frequency heard by the car driver is?Answer: Greater than 10 kHz You have 20 inductors available each of 15H. You need an inductor of 1H in a circuit. You achieve it by combination?Answer: 15 inductors in parallel A transformer has 100 turns on the input side 500 turns on the output side. If rms value of input voltage are 220V and 5A respectively. The output power is:Answer: 1100 watt When you drop a ball it accelerate at 9.8m/sec² . If you instead throw it downward then it accelerates immediately after leaving your hand assuming no air resistance:Answer: 9.8 A truck of mass 5000 Kg are both travelling at a speed at a speed of 36 Km/hr. Assume the time required to stop the truck in 10 sec is X Newton and the force required to stop the car in 10 sec us Y Newton. The difference X and Y is equal to?Answer: 4 Kilo Newton A tight wire is clamped at two points 2m apart. It is plucked near one end, what are the three longest wavelengths produced on the vibrating wire?Answer: 4m, 2m, 1.33m When using optical fiber in data transmission, the angle of incidence Oi of the light siyrce ib the glass fiber should be?Answer: Greater than critical angle A particle is moving in a straight line with velocity v = (4 - t₂ ) where t us the time from fixed point then acceleration of the particle after 4 sec is:Answer: -4m/sec₂ The maximum value if drag forcer on an object is 9.8 N. What will be the value if its mass?Answer: 1 kg Which of the following should remain constant if no torque acts upon a bofdy:Answer: Angular momentum Rocket propulsion is according to law of conservation of:Answer: Momentum The time period of pendulum at centre of earth:Answer: Infinite The wavelength of wave is 5000 Å. This wave will be in region:Answer: Visible Which of the following friction is self-adjusting force:Answer: Static A body absorbs heat at constant temperature, then this phenomenon will be:Answer: Both A and B Speed of sound in vacuum is:Answer: 0m sec₋₁ Most ideal gas at room temperature is:Answer: H₂ When spectrum of hydrogen atom is taken in magnetic field¸ some new lines are created. This is called:Answer: Zeeman’s effect Ball pen functions on the principle of:Answer: Surface tension There are 50 students in the class put of these 38 used desktop computers, 16 out of these used laptop. It is noited that five students neither used laptop or computer. The student having both laptop and computer is A. based on the information find out the greatest value of A :Answer: 4 There are 50 students in the class put of these 38 used desktop computers, 16 out of these used laptop. It is noited that five students neither used laptop or computer. The student having both laptop and computer is A. based on the information find out the greatest value of A :Answer: 4 A line segment whose end points lie on a circle is called the:Answer: Chord of circle The trigonometric equation contains__________ trigonometric functions:Answer: At least one