Description : Which of the following vacuum pumps operates by using a very cold surface to trap the gases on the cold surface? Is it a: w) sublimation pump x) turbo pump y) cryopump z) diffusion pump.
Last Answer : ANSWER: Y -- CRYOPUMP
Description : If overloading a DC machine becomes necessary in an emergency, you should ____________. A. cool the machine with portable blowers and fans B. hold thermal overload relays open with blocks of ... the windings for cooling D. increase the residual magnetism value of windings to reduce eddy currents
Last Answer : Answer: A
Description : How is air produced in mechanical draught cooling tower? a) Air Tuyeres b) Propeller fans c) Air blowers d) Louvre
Last Answer : Propeller fans
Description : How is air produced in mechanical cooling tower 1 air fan 2 propeller fans 3 air blowers 4 propeller blowers
Last Answer : 2 propeller fans
Description : How is air produced in mechanical draught cooling tower? A] Air Tuyeres. B] Propeller fans C] Air blowers. D] Louvre
Last Answer : B] Propeller fans
Description : High noise levels produced during operation of fans and compressors can be reduced by using (A) Mufflers (silencers) (B) Acoustic absorbent (C) Lagging of noisy duct (D) None of these
Last Answer : (A) Mufflers (silencers)
Description : Pick out the wrong statement: (A) Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer (B) Blowers develop a maximum pressure of 2 atmospheres ( ... factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number
Last Answer : (C) Friction losses in pipe fittings are generally expressed in terms of velocity heads
Description : Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg. (A) 1 (B) 0.1 (C) 0.01 (D) 0.001
Last Answer : (C) 0.01
Description : Which company produces the best quality leaf blowers?
Last Answer : There are many great companies that make leaf blowers. The top 4 are Echo, Ryobi, Toro and Black & Decker. Echo is a great brand with an awesome warranty!
Description : Inside an aeroplane flying at a high altitude, (a) the pressure is the same as that outside (b) normal atmospheric pressure is maintained by the use of air pumps (c) the pressure inside is less than the pressure outside (d) normal humidity and partial vacuum are maintained
Last Answer : Ans:(b)
Description : The maximum delivery pressure of compressors can be upto __________ atmospheres. (A) 10 (B) 100 (C) 250 (D) 1000
Last Answer : (D) 1000
Description : __________ pumps are a group of vacuum pumps. (A) Hyster (B) Sump (C) Mono (D) Submerged
Last Answer : (A) Hyster
Description : For concreting tunnel linings, transportation of concrete is done by (A) Pans (B) Wheel borrows (C) Containers (D) Pumps
Last Answer : (D) Pumps
Description : How much do brake vacuum pumps cost for a Saturn Vue?
Last Answer : You would have to go to Auto Zone, Pep Boys and speak to a mechanic to find out how much a brake pump would cost for a Saturn Vue. You can also go to the Saturn Dealership to find out how much they cost.
Description : Means for giving direction to the circulation of gases in furnaces are (A) Fans (B) Arrangement of heating stock in the furnaces (C) Location of outlet ports and heating & combustion devices (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Rotary compressors are used for delivering A. Small quantities of air at high pressure B. Large quantities of air at high pressure C. Small quantities of air at low pressure D. Large quantities of air at low pressure
Last Answer : ANSWER : D
Description : Which one of the following statements is correct? A. Reciprocating compressors are used to supply large quantities of air at a lower pressure ratio B. Centrifugal compressors are used to supply ... . Centrifugal compressors cannot be run at high speed because of impeller, diffuser and casing.
Last Answer : ANSWER : B
Description : List the advantages of keeping the discharge pressure for reciprocating compressors at minimum.
Last Answer : Lower power consumption Less load on the piston rods and hence reduced maintenance costs Lower leakage losses
Description : Which of the statement is True for centrifugal compressors? a) The compressor should not be operated at full load b) The compressor should be operated at shut off pressure c) The ... operated with inlet-guide vane control d) The compressor should not be operated close to the surge point
Last Answer : d) The compressor should not be operated close to the surge point
Description : What are the con sides of leaf blowers?
Last Answer : You have to buy gas for it.
Description : Is there a way to stop the gas guzzling leaf blowers? Any way to convince those who use them there must be another way?
Last Answer : I rake.
Description : How do leaf blowers work?
Last Answer : Leaf blowers use centrifugal force. The centrifugal force acts on the air surrounding the blower and forces it to be sucked into the fan. The fan then pushes the air out of the nozzle. (Some of the online tool stores are Toolnut.com and Amazon.com)
Description : How do snow blowers work?
Last Answer : Snow blowers work by producing throwing the snow from one location to another. This can be powered by either electricity, gasoline, or diesel.
Description : Are there any diesel snow blowers on the market?
Last Answer : Yes, there are many diesel snow blowers currently available for purchase. Diesel snow blowers have increased torque, which keeps them from bogging down.
Description : What companies make leaf blowers for the yard?
Last Answer : You can find leaf blowers for your yard that are made by Stihl, Black&Decker, Troy Bilt, Toro and Echo. Toro and Echo make the most highly rated leaf blowers as reported by consumer research.
Description : Are gas powered leaf blowers more powerful than electric ones?
Last Answer : Gas powered leaf blowers are normally more powerful than those that are run by electricity. Saying that, a gas powered blower is more cumbersome and can get heavy after a while.
Description : What should I know about John Deere snow blowers before buying one?
Last Answer : JOHN DEERe makes some of the best lawn, garden, and farm equipment in the country. As long as you use the equipment inline with the manufactures recommendation it will last for many many years.
Description : The amateur or newbie in the field of hacking who don’t have many skills about coding and in-depth working of security and hacking tools are called ________ a) Sponsored Hackers b) Hactivists c) Script Kiddies d) Whistle Blowers
Last Answer : d) Whistle Blowers
Last Answer : c) Script Kiddies
Description : Conversion of dynamic velocity head into static pressure head in a centrifugal pump is the result of : (a) Increasing area of flow between adjacent vanes from inlet to outlet (b) Difference in pressure between suction and delivery ends (c) Radial thrust in pumps (d) Stuffing Box
Last Answer : (b) Difference in pressure between suction and delivery ends
Description : The purpose of providing bleed points in the evaporator is to (A) Admit the feed (B) Remove the product (C) Facilitate removal of non-condensable gases (D) Create vacuum
Last Answer : (C) Facilitate removal of non-condensable gases
Description : The purpose of providing a 'catchall' in the vapor line of an evaporator is to (A) Create vacuum (B) Regulate the vapor flow (C) Vent the non-condensable gases (D) Arrest the entrained liquid
Last Answer : (D) Arrest the entrained liquid
Description : What Is The Difference Between A Rotary Screw Compressor And A Reciprocating Compressors?
Last Answer : A rotary screw compressor is one that utilizes two intermeshing helical rotors to trap a volume of air, then compress it to a higher pressure. Rotary screw compressors can be run at lower ... piston compressor (aka reciprocating) uses pistons driven by a crankshaft to deliver air at high pressure.
Description : . In a backward feed multiple effect evaporator (A) Feed is introduced in the first effect (B) Feed flows from low pressure to high pressure (C) No pumps are required between successive effects (D) None of these
Last Answer : (B) Feed flows from low pressure to high pressure
Description : Reciprocating pumps compared to centrifugal pumps (A) Deliver liquid at uniform pressure (B) Can handle slurries more efficiently (C) Are not subject to air binding (D) Can be operated with delivery valve closed
Last Answer : (C) Are not subject to air binding
Description : Foot valves provided in pumps are __________ valves. (A) Relief (B) Three/four way (C) Pressure reducing (D) Directional contro
Last Answer : (D) Directional control
Description : Plunger pumps are used for (A) Higher pressure (B) Slurries (C) Viscous mass (D) None of these
Last Answer : (A) Higher pressure
Description : In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes (A) Less than atmospheric pressure (B) More than liquid vapor pressure (C) Less than liquid vapor pressure (D) More than atmospheric pressure
Last Answer : (C) Less than liquid vapor pressure
Description : Centrifugal compressors compared to reciprocating compressors (A) Require less space (B) Have quieter operation (C) Have lower operating costs (D) All (A), (B) and (C)
Description : Multistage compressors are used in industry, because they (A) Reduce the cost of compressor (B) Reduce the size requirement (C) Resemble closely to isothermal compression (D) Are easy to control
Last Answer : (C) Resemble closely to isothermal compression
Description : Name the mode of transportation that reduces trains-shipment losses and delays in the supply of petroleum and gases? -SST 10th
Last Answer : Pipelinesis the mode of transportation that reduces trains-shipment losses and delays in the supply of petroleum and gases.
Description : The Department of Transportation regulations 49 CFR require which parameter to be recorded on the shipping paper for hazard class 2.2 nonflammable compressed gases?
Last Answer : no
Description : Maximum Differential pressure: a. Is the maximum authorized pressure difference between the inside of the fuselage and the atmospheric ambient pressure b. Is the absolute pressure provided by the vacuum ... time limit d. Is the absolute pressure the cabin pressure ducting is designed to carry
Last Answer : a. Is the maximum authorized pressure difference between the inside of the fuselage and the atmospheric ambient pressure
Description : Maximum Differential pressure: a. Is the maximum authorized pressure difference between the inside of the fuselage and the atmospheric ambient pressure b. Is the absolute pressure provided by the ... time limit d. Is the absolute pressure the cabin pressure ducting is designed to carry
Description : Polymerisation (A) Produces i-octane from cracked gases containing i-butane and butene (B) Causes olefins to combine with each other (C) Causes aromatics to combine with each other (D) Is aimed at producing lubricating oil
Last Answer : (B) Causes olefins to combine with each other
Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Large quantity of tar compared to low temperature carbonisation (D) None of these
Last Answer : (D) None of these
Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Larger quantity of tar compared to low temperature carbonisation (D) None of these
Description : Sound waves do not travel through _______. a) solids b)gases c)liquid d)vacuum
Last Answer : d)vacuum
Description : Pick out the wrong statement. (A) In solvent extraction, the distribution co-efficient should be as large as possible for solvent economy (B) With increase in pressure, the solubility of ... in distillation column (D) The capacity of a distillation column is maximum at total reflux
Last Answer : (D) The capacity of a distillation column is maximum at total reflux
Description : Determine the charge that produces an electric field strength of 40 V/cm at a distance of 30cm in vacuum(in 10 -8 C) a) 4 b) 2 c) 8 d) 6
Last Answer : a) 4