Exhaust gas pyrometers are useful for（）

相似题目

• Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.

  A . scavenging B . starting C . cooling D . blowing

  查看最佳答案

• The exhaust boilers are used to recover some of （） carried in the exhaust gas from the main engine.

  A . water B . oil C . heat D . steam

  查看最佳答案

• An exhaust gas bypass is installed on a waste heat boiler in order to （）.

  A . bypass exhaust gas at high loads to prevent excessive back pressure B . bypass a portion of the exhaust gas at peak loads for better efficiency C . recycle exhaust gas to the turbocharger D . minimize moisture condensation in the boiler gas passages at low load

  查看最佳答案

• Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passages

  A . (1)+(2) B . (1)+(3) C . (2)+(3) D . (1)+(2)+(3)

  查看最佳答案

• The normal color of the exhaust gas of the diesel will be （）

  A . achromatism or thin gray B . thin white C . sky-blue D . black

  查看最佳答案

• Exhaust pyrometer readings provide an indication of the （）

  A . effectiveness of water-cooled exhaust elbows B . distribution of the load between engine cylinders C . amount of fuel penetration into the engine cylinders D . indicated horsepower of the engine cylinder

  查看最佳答案

• The forced draught fan should be started and air passed through the furnace for several minutes to “（）” it of any exhaust gas or oil vapors.

  A . blow B . clean C . scavenge D . purge

  查看最佳答案

• Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）

  A . natural aspiration B . masked intake valves C . air cells D . scavenging air

  查看最佳答案

• The high air velocity leaving the compressor of an exhaust gas turbocharger is converted to pressure in the （）

  A . inlet nozzle ring B . turbine wheel blade C . diffuser passages D . inlet vol

  查看最佳答案

• After passing through the turbine the exhaust gas is conducted out into the（）.

  A . intercooler B . compressor C . cylinder D . open air

  查看最佳答案

• The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to （）

  A . prevent engine back pressure at heavy loads B . increase total engine efficiency at low loads C . prevent boiler corrosion at low engine loads D . improve engine fuel consumption at any load

  查看最佳答案

• The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by （）

  A . pumping action of the piston B . pressure of the fuel charge C . vacuum developed in the manifold D . pressure of the fresh air charge

  查看最佳答案

• For a diesel engine, individual cylinder performance is commonly determined by exhaust gas（）

  A . chemical analysis B . back pressure readings C . pyrometer readings D . infrared analysi

  查看最佳答案

• The hot expanding gas rotates the blades of the exhaust turbine, thus giving out large part of its power, which drives （）.

  A . the oil separator B . the fresh water generator C . the compressor D . fire pum

  查看最佳答案

• Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.

  A . DEFE B . DE C . DS D . DES

  查看最佳答案

• In comparing engines of equal horsepower, higher exhaust gas temperatures occur in a/an（）

  A . opposed-piston engine B . double-acting engine C . two-stroke/cycle engine D . four-stroke/cycle engine

  查看最佳答案

• Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）

  A . increase back pressure during the exhaust process B . facilitate periodic replacement of the valves C . reduce the pumping loss associated with scavenging D . reduce tension on valve spring

  查看最佳答案

• The hot expanding gas rotates the blades of the exhaust turbine, thus （） a large of its power, （） drives the compressor.

  A . to give off；which B . giving off；which C . to give off；that D . giving off；that

  查看最佳答案

• The boiler is fired （） the demand for steam exceeds that available from exhaust gas heating.

  A . whenever B . however C . wherever D . whether

  查看最佳答案

• Pyrometers commonly found on diesel engine exhaust systems, consist of（）

  A . pyrostats and a voltmeter B . a gas-filled bellows, a tube and a pressure gauge C . thermocouples and a voltmeter D . ammeters and thermocouple

  查看最佳答案

• The exhaust pipe must be gas tight throughout its entire length otherwise（）.

  A . bilge water may enter the exhaust pipe B . entry of air may cause vapor lock C . carbon monoxide may enter the interior of the vessel D . the joint gaskets may be blow

  查看最佳答案

• For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

  A . the temperature and flow quantity of the exhaust gas from M/E B . the quantity of steam demanded C . the rotary speed and the cooling water temperature of main engine D . efficiency of M/ turbocharger

  查看最佳答案

• Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）

  A . cooling water leaving each cylinder B . fuel oil entering the injector C . exhaust gases at various locations D . lube oil at the bearing supplie

  查看最佳答案

• For a diesel engine, individual cylinder performance is commonly determined by exhaust gas_____________.

  A.chemical analysis B.back pressure readings C.pyrometer readings D.infrared analysis

  查看最佳答案