ECAT - University of Engineering and Technology (UET) Lahore 2014 Past Paper with Answers

Practice the ECAT - University of Engineering and Technology (UET) Lahore 2014 past paper with 62 solved MCQs, answers and topic coverage.

62 solved MCQs across 1 approved paper

A 500kg rocket travels in deep space of a constant speed of 300m/s. The power being produced by the rocket engine at this time:Answer: None of these A shell is fired at an angle of 45 degree above ground with an initial velocity of 100 m/sec. It will hit the ground assuming “g” 10 m/sec₂ after about:Answer: 14 seconds Find the average speed of a car whose velocity – time graph is shown in the figure:Answer: 15 m/sec A girl stands on a weighing scale placed in a stationary lift (elevator). The scale reads 30kg. The lift is then activated to move from ground floor to 10th floor. As the lift moves from its stationary position on the ground floor until it comes to rest on the 10th floor, the scale reading will:Answer: First increase, become constant for some time and then decrease A 1000 kg truck pulls a 500 kg car by means of a tope with a speed of 10 m/sec. The rope suddenly breaks causing the truck to move forward with a speed of 13 m/sec. Find the speed of the car after the rope breaks:Answer: 4 m/sec in the same direction as that of the truck In an elastic collision between two bodies, the following is conserved:Answer: Kinetic energy and momentum As the water falls from a top, its cross sectional are should decrease according to:Answer: Continuity equation The phenomenon if interference occurs in:Answer: All types of waves The density of oxygen is about 16 times that of the hydrogen. Therefore if speed of sound in oxygen is x, its speed in hydrogen will be:Answer: Greater than x A police motor cycle running at 130 km/h sounds a siren of 2 KHz frequency while a car running at 150 km/h. th apparent frequency of the siren heard by the car driver will be:Answer: Less than 2 KHz Young’s double slit experiment is used to study interference of:Answer: Visible light You have 15 capacitors available with you, each of 15nF. You need a capacitance of around 150nF in a circuit. You can achieve this value by connecting.Answer: 10 capacitors in parallel Current through a 2mH inductor is i(L) -2sin 100 Amps. The voltage across the inductor will be:Answer: 400 mv The following device does not use electromagnetic waves for its operation:Answer: Ultra-sound machine A transistor cannot be used as a:Answer: Power source A 1000 kg truck carrying a load of 500 kg travels on a mountain road for minute at constant speed. If power output is 2500 watts. Assuming g = 10m/sec₂ , it will achieve a vertical height of:Answer: 100m A thermistor with positive temperature coefficient is used to measure temperature in an oven. When temperature of the oven increases, the resistance value of thermistor:Answer: Increases When a metal surface is escaped to light it may emit electrons. The maximum energy of these electrons depends on:Answer: Wavelength of light Reception of a particular radio station is selected by tuning the tuning knob of a radio. Tuning the tuning knob changes the:Answer: Capacitance of the tuning circuit AC voltage is fed into a single diode rectifier. The output of the rectifier is:Answer: Half wave rectified DC voltage In frequency modulation, the amplitude of the carrier waves remains the same butits frequency changes in proportion to:Answer: The amplitude of the modulating signal An transformer has 100 turns on the input side and 500 turns on the output side. If the rms values of the input voltage and current are 200 v and 2A respectively, then the output power is about:Answer: 1440 watts According to Heisenberg’s uncertainly principle, for any given particle it is not possible to accurately measure :Answer: Both position and momentum One of the environment friendly means of generating circuit power is from Bio-gas. Bio-gas is?Answer: Produce from cattle gas Two blocks of iron are heated to 200 degree C and 400 degree C respectively. Compared to the 200 degree C blocks, the 400 degree C block will emit radiation of:Answer: Smaller wavelength When you drop a ball it accelerates downwards at 9.8 m/sec₂ . If you instead throw it downward,then its accelerating immediately after leaving your hand, assuming no air resistance is:Answer: 9.8 m/sec₂ An arithmetic progression has a first term of 12 and a fifth term of 1/. The sum of the first 25 terms is:Answer: 150 The first three terms in a geometric progression are 144,x and 64 respectively. Where x is positive. The sum to infinity of the progression is:Answer: 96 More than one crystalline form of an element:Answer: Allotropy In an alkaline battery the anode the cathode and electrolyte are respectively.Answer: Zinc, manganese dioxide, potassium hydroxide