Description : The temperature of oxy-acetylene flame is around (1) 2800°C (2) 3200°C (3) 4000°C (4) 1500°C
Last Answer : 3200°C
Description : Stainless steel is welded using (A) Oxy-acetylene flame (B) Oxy-hydrogen flame (C) Arc welding (D) Inert gas arc welding
Last Answer : (D) Inert gas arc welding
Description : Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal. (A) Burning (B) Intensive oxidation (C) Evaporation (D) None of these
Last Answer : Option B
Description : While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C. (A) 2000 (B) 3000 (C) 4500 (D) 6000
Last Answer : (C) 4500
Description : 99.5% purity oxygen is used in (A) Cutting and welding by oxy-acetylene flame (B) Hospitals for medicinal purposes (C) Gas masks and artificial breathing apparatus (D) All (A), (B), and (C)
Last Answer : (D) All (A), (B), and (C)
Description : The temperature of oxyacetylene flame is around – (1) 2800°C (2) 3200°C (3) 4000°C (4) 1500°C
Last Answer : (2) 3200°C Explanation: Flames are formed when a fuel gas, like acetylene, reacts with a support has such as oxygen. This reaction creates a lot of heat and light, which we see as a flame. ... flame temperature to allow localized melting of the work piece material (e.g. steel) in a room environment.
Description : Two equal sums are lent at the same time at 6% and 5 % simple interest respectively. The former is recovered 24 months earlier than the latter. And the amount in each case is Rs. 2400. Find the sum of money lent initially. a) 1500 b) 2000 c) 2400 d) 3000 e) 3600
Last Answer : Let the sum be S, time be ‘n’ years for 6%. n+2 years for 5% 2400 = S + S ×n × 6/100 2400 = S + S × (n+2) × 5/100 So, 6n = 5(n+2) or n = 10 years. 2400 = S + S × 10 × 6/100 = 1.6S S = 2400/1.6 = 1500 Answer: a)
Description : Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is __________ Nm3. (A) 0.5 (B) 1 (C) 1/3 (D) 2.5
Last Answer : Option D
Description : Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these
Description : Which of the following has the highest theoretical flame temperature? (A) Blast furnace gas (B) Hydrogen (C) Acetylene (D) Coke oven gas
Last Answer : (C) Acetylene
Description : A and B entered into a partnership investing Rs. 16000 and Rs. 12000 respectively. After 3 months, A withdrew Rs. 5000 while B invested Rs. 5000 more. After 3 more months C joins the business with a capital of Rs. 21000 ... of Rs. 26400 after one year by A.Rs. 2400 B.Rs. 3600 C.Rs. 3000 D.Rs. 4800
Last Answer : Answer: B (Rs. 3600) Explanation: A:B: C = 16000 x3 + 11000×9:12000 x 3 + 17000 x 9:21000 x 6 = 147:189:126 = 7:9:6 Difference of B and C’s shares = Rs. [26400 x (9/22) — 26400 x (6/22)) = Rs. 3600.
Description : Describe in brief the equipments required for oxy-acetylene welding.
Last Answer : The following equipments are required for oxy-acetylene welding. 1. Welding torch or Blowpipe: It is the tool for mixing two gases in the desired volumes and burning the mixture at the end of a ... particularly when the oxides of the base metal have a higher melting point than the metal itself.
Description : List types of welding flames used in Oxy-acetylene welding. Write their characteristics and applications.
Last Answer : Types of Flames: Characteristics Applications. 1)Neutral Flame: When oxygen and acetylene are supplied to the torch in nearly equal volumes, a neutral flame is produced. It has two ... cone of whitish colour. 3) Bluish outer cone High Carbon Steel, non - ferrous alloys,
Description : Alpha iron is stable __________ °C. (A) Above 1403 (B) Upto 910 (C) Above 1800 (D) Between 910 & 1403
Last Answer : (B) Upto 910
Description : Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are ... __________ °C. (A) 400-500 (B) 900-1000 (C) 1400-1500 (D) 1700-1800
Last Answer : (B) 900-1000
Description : High temperature carbonisation of coal takes place at __________ °C. (A) 2000 (B) 600 (C) 1100 (D) 1600
Last Answer : (C) 1100
Description : The temperature in the calcium carbide furnace is __________ °C. (A) 200-300 (B) 700-850 (C) 2000-2200 (D) 4000-4500
Last Answer : (C) 2000-2200
Description : High temperature carbonisation of coal takes place at __________ °C. (A) 2000 (B) 700 (C) 1100 (D) < 500
Description : A motor pumps water from a well into a tank at the rate of 3000 c.c./sec while another outlet pumps water out of the tank at the rate of 1800 c.c./sec
Last Answer : A motor pumps water from a well into a tank at the rate of 3000 c.c./sec while another outlet ... the motor and outlet are in operation (in minutes).
Description : One year ago the ratio between rahul salary and rohit salary is 4:5. The ratio between their individual salary of the last year and current year is 2:3 and 3:5 respectively. If the total current salary of rahul ... find the current salary of rahul. a) 1200 b) 1800 c) 2400 d) 3600 e) None of these
Last Answer : Answer: B 4x and 5x is the last year salry of rahul and rohit respectively Rahul last year to rahul current year = 2/3 Rohit last year to rohit current year = 3/5 Current of rahul + current of rohit = 4300 (3/2)*4x + (5/3)*5x = 4300. X = 300. So rahul current DDsalary = 3/2 * 4* 300 = 1800
Description : Two Pelton turbines A and B have the same specific speed and are working under the same head. Turbine A produces 400 kW at 1000 rpm. If turbine B produces 100kW, then its rpm is (a) 4000 (b) 2000 (c) 1500 (d) 3000
Last Answer : (b) 2000
Description : Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. (A) 25 (B) 60-70 (C) 150-200 (D) 250-300
Last Answer : (B) 60-70
Description : Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C. (A) 15-30 (B) 90-100 (C) 250-300 (D) < 0
Last Answer : (A) 15-30
Description : Pick out the wrong statement. (A) Strongly caking coal should not be used in the Lurgi gasifier (B) Acetylene gas cannot be used for illumination purpose (C) Water gas is called blue gas ... is burnt (D) Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels
Last Answer : (B) Acetylene gas cannot be used for illumination purpose
Description : Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C. (A) 80 (B) 130 (C) 180 (D) 250
Last Answer : (B) 130
Description : The maximum delivery pressure of a reciprocating compressor may be about __________ kg/cm2 . (A) 1000 (B) 2000 (C) 3000 (D) 4000
Last Answer : (D) 4000
Description : BOD of raw municipal sewage may be in the range of about __________ mg/litre. (A) 1-2 (B) 5-10 (C) 150-300 (D) 2000-3000
Last Answer : (C) 150-300
Description : A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm. (A) 1000 to 2000 (B) 3000 to 6000 (C) 6000 to 9000 (D) 10000 to 100000
Last Answer : (D) 10000 to 100000
Description : __________ has the widest inflammability limit (explosion limit) of all the gases. (A) Hydrogen (B) Carbon monoxide (C) Acetylene (D) Methane
Description : The widest explosive limit is of __________, thereby making it the most explosive gas. (A) Acetylene (B) Petrol vapor (C) Hydrogen (D) Carbon monoxide
Last Answer : (A) Acetylene
Description : Typical human voice is centered around ________Hz. (A) 200-400 (B) 280-3000 (C) 400-600 (D) 1400-1800
Last Answer : (B) 280-3000
Description : Maximum vertical clearance (VC) for a slab/ girder bridges with discharge above 3000 cumecs is a) 300 mm b) 1500 mm c) 1800 mm* d) 600 mm
Last Answer : c) 1800 mm*
Description : If the effective plan area of a warehouse is 54 sq. m, and maximum height of piles permitted is 270 cm, the number of cement bags to be stored, is (A) 2000 bags (B) 2200 bags (C) 2400 bags (D) 2700 bags
Last Answer : Answer: Option D
Description : The cutter bar of a tractor operated mower ordinarily makes: A. 800-1200 strokes/min B. 1600-2000 strokes/min C. 2400-2800 strokes/min D. 3200-3600 strokes/min
Last Answer : A. 800-1200 strokes/min
Description : Some amount out of Rs.8500 was lent at 5% per annum and the remaining was lent at 3% per annum. If the total simple interest from both the fractions in4 years was Rs.1500, the sum lent at 5% per annum was a) Rs. 2400 b) Rs. 2200 c) Rs. 2000 d) Rs. 6000
Last Answer : D Total simple interest received , I = Rs.1500 Principal , p = 8500 period, n = 4 years Rate of interest, r = ? Simple Interest, I=PNR/100 1500 = ( 8500 4 r )/ 100 = ... total amount is Rs.8500. Therefore, the amount lent at 5% per annum (part1 amount) = 8500x12/17 = 6000
Description : Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis. (A) 500 (B) 750 (C) 950 (D) 1100
Last Answer : (B) 750
Description : In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C. (A) 20 (B) 60 (C) 120 (D) ∞
Last Answer : (D) ∞
Description : Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gas-air mixture), rendering it the property of the most explosive gas? (A) Hydrogen (B) Acetylene (C) Carbon monoxide (D) Ammonia
Last Answer : (B) Acetylene
Description : In the blast furnace, incorporation of water vapour in the blast gives the following effect. (A) Increases the reducing potential of the gas (B) Increases the flame temperature (C) No significant change occurs (D) Increases the hydrogen content in the metal
Last Answer : (A) Increases the reducing potential of the gas
Description : If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace. (A) Sidefired (B) Underfired (C) Covered (D) Recirculating
Last Answer : (B) Underfired
Description : Early Harappan phase, Mature (urban) phase, Savalda culture, 2000-1800 B.C.E.
Last Answer : Find the incorrect pair from set B' and write the correct ones: Set A' Set B' (a) Early Harappan ... . (d) Post-Harappan phase 1900-900 B.C.E.
Description : On 1st April, 2013, Y Ltd. Issued 1000, 12% debentures of Rs. 100 each at a discount of 6%. These debentures are redeemable in five equal annual instalments at the end of each year. What is the amount of discount to be written off ... & L A/c ? (A) Rs. 2000 (B) Rs. 1800 (C) Rs. 1200 (D) Rs. 600
Last Answer : Answer: Rs. 1200
Description : The weight of 1 m3 of brick earth, is about (A) 1200 kg (B) 1500 kg (C) 1800 kg (D) 2000 kg
Last Answer : Answer: Option C
Description : Ashok being the sleeping partner receives 1/10th of profit and the remaining is divided between pramod and prakash in the ratio of 1:2..If the difference between the profit shares of Ashok and Prakash is Rs.2000.What is pramod’s share in Rs.? A.Rs.1800 B.Rs.2200 C.Rs.1200 D.Rs.1500
Last Answer : Answer:- C (1200) Explanation:- let total profit =x ashok's share in profit is (1/10)x remaining profit = x= (1/10)x= (9/10)x pramod's share= 1/3 x (9/10)x = (3/10 )x Prakash's share= 2/3 ... /10)x = (5/10)x 5/10 x = 2,000 so, x= 4000 pramod's share= (3/10) x 4000=1200
Description : If 10% of a number is subtracted from it, the result is 1800. The number is (1) 1900 (2) 2000 (3) 2100 (4) 2140
Last Answer : (2) 2000
Description : Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV. (A) 20 (B) 200 (C) 500 (D) 2000
Last Answer : (B) 200
Description : Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of (A) Rubber lined mild steel (B) Lead lined mild steel (C) Aluminium (D) Cast iron
Last Answer : (A) Rubber lined mild steel
Description : Should I purchase a psp 2000 or wait for a possible psp 3000?
Last Answer : answer:Hmmm I honestly hope it's not in the near future. I'm not ready! I just don't feel like I've gotten enough use out of our PSP to be trading it in for a new one yet. Besides, I haven't gotten ... out as long as it has. It still feels new to me. Time is moving too fast. Jeez I'm getting old!
Description : A 3.2 m diameter balloon is filled with Helium. The total weight of balloon, gas and pay load is 10 kg kg. In an isothermal atmosphere having conditions identical to N.T.P. the balloon will rise to a height of about a.6000 m b.1500 m c.3000 m d.2000 m e.1000 m
Last Answer : a. 6000 m
Description : What is the weight of a Psp 1000 model console versus a 2000 and 3000 model?
Last Answer : The PSP 1000 and PSP 2000 are both .62 lbs/280 grams including battery.The PSP 3000 is approximately 189g / 6.7oz (including battery pack)