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বাংলাদেশ কেমিক্যাল ইন্ডাস্ট্রি এর পরীক্ষার প্রশ্নের সম্পূর্ণ সমাধান

বাংলাদেশ কেমিক্যাল ইন্ডাস্ট্রি এর পরীক্ষার প্রশ্নের সম্পূর্ণ সমাধান

পদ: উপ-সহকারী প্রকৌশলী 

পরীক্ষাঃ ১০ ডিসেম্বর ২০২১ 



বাংলা অংশের সমাধানঃ 

১. জীবনান্দ দাশ রচিত নয়? উত্তরঃ অপশনের সবগুলোই জীবনান্দ দাশ রচিত তাই সঠিক উত্তর নাই। 

ব্যাখ্যাঃ জীবনান্দ দাশ রচিত নয় -অদ্ভুত এক আঁধার। জীবনান্দ দাশের কবিতার নাম অদ্ভুত আঁধার এক। 

২. পাদচ্ছেদ বলা হয় কোন যতিচিহ্নকে? উত্তরঃ কমা 

৩. “আলালের ঘরের দুলাল” উপন্যাস প্র্রথমে কোন পত্রিকায় ধারাবাহিকভাবে প্রকাশিত হয়? উত্তরঃ মাসিক পত্রিকা 

৪. শামসুর রাহমানের প্রথম কবিতা কোন পত্রিকায় প্রকাশিত হয়? উত্তরঃ সোনার বাংলা 

৫. ‘নলি’ অর্থ কী?  উত্তর: নল 

৬. “বড় চণ্ডীদাসের কাব্য” গ্রন্থের সম্পাদক – উত্তর: মুহাম্মদ আব্দুল হাই ও আনোয়ার পাশা 

৭. দীনেশচন্দ্র সেন সম্পাদিত ‘পূর্ববঙ্গ-গীতিকা’র কোন খণ্ড ‘মৈমনসিংহ গীতিকা’ নামে প্রকাশিত? উত্তর: প্রথম খণ্ডে   

৮. কোন বাক্য অশুদ্ধ? উত্তর: লোকটি নিরপরাধী  

৯. ‘প্রথম>পরথম’ কী ধরনের ধ্বনি পরিবর্তন?  উত্তর:  বিপ্রকর্ষ  

১০. ‘বাংলাদেশের আঞ্চলিক অভিধানে’র প্রধান সম্পাদক? উত্তর: ড. মুহম্মাদ শহীদুল্লাহ



ইংরেজি অংশের সমাধানঃ  

১১. My boss wants the work — before long. উত্তর: finished 

১২. The lion rushed — the rabbit. উত্তর: at

১৩. They selected me for the job only — merit. উত্তর: on

১৪. The affection of his wife bore him up in the midst of all his problems. উত্তর: To sustain 

১৫. Antonym of ADHERE is?  উত্তর: Detach 

১৬. The passive voice of ‘You can help us.’ উত্তর: We can be helped by you. 

১৭.  MULTIPLICATION: DIVISION:: উত্তর: Increase: Decrease

১৮. HEART: CARDIOLOGY:: উত্তর: Fossil: Paleontology

১৯. SHIELD: SOLDIER::  উত্তর: Helmet: Rider

২০. Find out the correctly spelt word: ত্তর:  Gregarious


গণিত অংশের সমাধানঃ  

২১. How many prime numbers are in between 45 to 72? উত্তর: 6

২২. What is the difference between the 6 digit largest and smallest numbers? উত্তর: 899999

২৩. An amount of Tk. 735 less, their shares would have been in the ratio of 1:3:2. The money received by C was:  উত্তর: 245

২৪. Sam ranked ninth from the top and thirty-eight from the bottom in a class. How many students are there in the class? উত্তর: 46 

২৫. The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students? উত্তর: 12 

২৬. The sum of the ages of the son and father is 120 years. The father’s age is 3 times than that of the son. What is the age of the father? উত্তর: 90

২৭. In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is: উত্তর: 39

২৮. A man’s regular pay is Taka 30 per hour up to 40 hours. Overtime is twice the payment for regular time. If he was paid Taka 1680, how many hours overtime did he work? উত্তর:  8

২৯. Idrak buys 80 kg sugar at Taka 40 per kg and 40 kg rice at Taka 50 per kg. At what price approximately in Taka per kg should he sell to make a profit of 10% on cost? উত্তর: 47.7

৩০. A rectangular field will be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 square feet, how many feet of fencing will be required? উত্তর: 88 


সাধারণ জ্ঞান ও কম্পিউটার অংশের সমাধানঃ    

৩১. Capital of Malawi is- উত্তর: Lilongwe

৩২. Who was the leading scorer in the T-20 World Cup 2021? উত্তর: Baber Azam 

৩৩. Which Asian country is home to the most nuclear power plants? উত্তর: China 

৩৪. The currency of Ecuador is- উত্তর: US Dollar 

৩৫. Most World Wide Web pages contain commands in the language of- উত্তর: HTML


বিষয়ভিত্তিক অংশের সমাধানঃ   

৩৬. The self-ignition temperature of Diesel as compared to petrol is- উত্তর: Lower

৩৭. What type of bearing is used for main bearings and connecting rod bearings? উত্তর: Plain bearings

৩৮. A four-cylinder engine has a capacity of 2.4 liters. The swept volume of one cylinder is? উত্তর: 600 cm³

৩৯. When the piston is at T.D.C, the volume above the piston in the combustion chamber is the? উত্তর: Clearance volume 

৪০. The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is? উত্তর: Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads

৪১. The basic function of the suspension is to? উত্তর: Absorbs vibration and impact forces from the road surface

৪২. In a four-stroke engine for each crankshaft revolution, the camshaft revolves? উত্তর: One half turn

৪৩. The discharge through a reaction turbine ____ with the increase in unit speed. উত্তর: Decreases

৪৪. The ignition in a spark ignition engine takes place when the piston is? উত্তর: Approaching the T.D.C. position on its compression stroke 

৪৫. The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will- উত্তর: First increase, reach maximum and then decrease

৪৬. Which of the following property is desirable for materials used in tools and machines? উত্তর: Elasticity

৪৭. An engineer’s hammer is made of? উত্তর: High carbon steel

৪৮. The forces, which meet at one point, but their lines of action do not lie in a plane, are called? উত্তর: Non-coplanar concurrent forces 

৪৯. In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is? উত্তর: 100 

৫০. Which of the following statement is correct? উত্তর: The kinetic energy of a body before impact is more than the kinetic energy of a body after impact

৫১. D’ Alembert’s principle is used for? উত্তর: Reducing the problem of kinetics to equivalent statics problem

৫২. In the shown figure, if the angle of inclination of the plane is increased, then acceleration of the system will–? উত্তর: Decrease

৫৩. In convection heat transfer from hot flue gases to water tube, even though flow may be turbulent, a laminar flow region (boundary layer of film) exists close to the tube. The heat transfer through this film takes place by? উত্তর: Conduction

৫৪. Two balls of the same material and finish have their diameters in the ratio of 2 : 1 and both are heated so same temperature and allowed to cool by radiation. The rate of Cooling by big ball as compared to smaller one will be in the ratio of? উত্তর: 1: 2

৫৫. The ratio of quantity of liquid discharged per second from the pump of the quantity of liquid passing per second through the impeller is known as?  উত্তর: Volumetric efficiency

৫৬. A two-stroke cycle engine gives ___ the number of power strokes as compared to the four-stroke cycle engine at the same engine speed. উত্তর: Double

৫৭. A gas has a swept volume of 300 cm³ and clearance volume of 25 cm³. Its volumetric efficiency is 0.88 and mechanical efficiency is 0.90. The volume of the mixture taken in per stroke is? উত্তর: 264 cm3

৫৮. Which of the following screw thread is used for power transmission in one direction only? উত্তর: Buttress threads

৫৯. Which of the following statement is correct? উত্তর: The cold rolled shafting is stronger than hot rolled shafting

৬০. The deflection of a cantilever beam under load W is 8. If its width is halved, then the direction under load W will be? উত্তর: 4/8

৬১. Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be? উত্তর: 16

৬২. Crack in grinding wheel is developed at the contact of the wheel face and work. উত্তর:  High speed of wheel

৬৩. In a metal arc welding process, metal transfer across the are may take place by a method of material transfer where the metal transfers across the are is in larger drops. This is at the rate of 100 drops/sec or less, what is this known as? উত্তর: Dip transfer

৬৪. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles on and 2 cycles off Power supply is at 50 Hz, Calculate R.P. M. and energy requirement of the above circular electrodes assuming effective resistances between electrodes as 100 ohm? উত্তর: 2.17 rpm, 600 joules

৬৫. In a psychrometric process, the sensible heat added is 30 kj/s and the latent heat added is 20kj/s. The sensible heat factor for the process will be? উত্তর: 0.6

৬৬.A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be? উত্তর: 450 m/s 

৬৭. The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called?

উত্তর: Induced draught

৬৮. In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be? উত্তর: Increase key width

৬৯. The buckling load for a given material depends on? উত্তর: Slenderness ratio, area of cross-section and modulus of elasticity

৭০. A ber of copper and steel form a composite system, which is heated to a temperature of 400 C. The stress induced in the copper bar will be? উত্তর: Compressive