Kinematics links - Every part of machine which have relative motion to another part. → The link should be resistance body. What is resistant body? →Under the action of force it can transfer motion and power. Kinematics links →1. Rigid links 2. Flexible links 3. Fluid links Rigid links - There is no deformation. Ex - piston,connecting rod Flexible links - Deformation is allowed under permissible limits. Ex - Belt drive Fluid links - A fluid link is one that is deformed by having fluid in a closed vessel and the motion is transmitted through the fluid by pressure. Ex - Hydraulic press Types of links - 1. Singular 2. Binary 3. Ternary 4. Quaternary links
I.C engine 200 MCQ-ssc-upsc- mechanical
engineering :-
Part - 1
1.Indicated power of four stroke engine is equal to -
A. pLAN B. 2pLAN
C. pLAN/2. D. 4pLAN
ANS - C
2.Compression ratio of I.C. engine is-
A. the ratio of volumes of air in cylinder before compression & after compression stroke.
B.volume displaced by piston per stroke & clearence volume in cylinder.
C.swept volume/cylinder volume
D.cylinder volume/swept volume
ANS- A
3.Scavenging air of diesel cycle means-
A.air used for combustion.
B.forced air for cooling cylinder.
C.air used for forcing burnt gases out of engine's during the exhaust period.
D.air fuel mixture.
ANS- C
4.The working cycle un case of four stroke engine is completed in following number of revolutions of crankshaft-
A. 1/2 B. 1
C. 2 D. 8
ANS - C
5.An engine indicator is used to determine the following-
A. Speed B.temperature
C. BHP D.m.e.p & I.H.P
ANS- D
6.Supercharging is the process of-
A.supplying the intake of an engine with air at a density greater than the density of the surrounding atmospher.
B.providing forced cooling air.
C.injecting excess fuel for raising more load.
D.raising exhaust pressure.
ANS - A
7.The air standard efficiency of an otto cycle compared to diesel cycle for the given compression ratio is-
A. Same B. Less
C. More D.unpredictable
ANS - C
8.In a diesel engine,the fuel is ignited by-
A. Spark B.Injected fuel
C. heat resulting from compressing air that is supplied for combustion.
D. Combustion chamber.
ANS - C
9.In case of gas turbines,the gasious fuel consumption guarantees are based on-
A.high heat value B.low heat value C.net calorific value D.middle heat value
ANS- B
10.The specified fuel consumption per BHP hours for diesel engine is approximately-
A. 0.15 kg B. 0.2 kg
C. 0.25 kg D. 0.3 kg
ANS - B
11.The maximum temperature of I.C engine cylinder of the order of-
A. 500-1000°C B. 1000-1500°C
C. 2000-2500°C D. 2500-3000°C
ANS - C
12.The fuel in diesel engine is normally injected at pressure of-
A. 5-10 kg/cm^2. B. 20-25 kg/cm^2
C. 60-80 kg/cm^2 D. 90-130 kg/cm^2
ANS - D
13.The ratio of indicated tharmal efficiency to corresponding air standard cycle efficiency is called-
A. Net efficiency B. Efficiency ratio
C. Relative efficiency D. Overall efficiency
ANS - C
14.Combustion in compression ignition engines is-
A. Homogeneous B. Heterogeneous
C both A&B D. Turbulent
15. The specific fuel consumption per BHP hour for a petrol engine is approximately-
A. 0.15 kg B. 0.2 kg
C. 0.25 kg D. 0.3 kg
ANS - C
16.Compression loss I.C engine occurs due to-
A. Leaking piston rings
B. Use of thick head gasket
C. Clogged air-inlet slots
D. All this above
ANS -D
17.The inet valve of 4 stroke cycle I.C engine remains open for nearly-
A. 180° B.125 °
C. 200° D. 235°
ANS - D
18.The precesses of braking up or a liquid into fine droplets by spraying is called-
A. Vaporisation B. Carburetion
C. Injection D.atomisation
ANS -D
19.Which of following is not internal combustion engine?
A. 2 stroke engine B. 4 stroke engine
C. Gas turbine D. Steam engine
ANS - D
20.Most high speed compression engines operates on-
A. Diesel cycle B. Dual cycle
C. Otto cycle D. Carnnot cycle
ANS - D
21.Gaseous-fuel garantees are based on-
A. Calorific value of oil.
B. Low heat value of oil.
C. High heat value of oil.
D. All of the above.
ANS- B
22.When crude oil is heated,then which of the following hydrocarbon is given off first-
A. Natural gas B. Kerosene
C. Diesel D. Paraffin
ANS - A
23.A 75 cc engine has following parameters as 75 cc -
A. Fuel tank capacity. B. Lub oil capacity
C. Swept volume D. Cylinder volume
ANS- C
24.In diesel engine diesel fuel injected into the cylinder would burn instantly at about compressed air temperature of-
A. 250° B. 500°
C. 1000° D. 1500°
ANS - C
25.The air fuel ratio of the petrol engine is controlled by-
A. Fuel pump B. Carburettor
C. Injector D. Governor
ANS - B
engineering :-
Part - 1
1.Indicated power of four stroke engine is equal to -
A. pLAN B. 2pLAN
C. pLAN/2. D. 4pLAN
ANS - C
2.Compression ratio of I.C. engine is-
A. the ratio of volumes of air in cylinder before compression & after compression stroke.
B.volume displaced by piston per stroke & clearence volume in cylinder.
C.swept volume/cylinder volume
D.cylinder volume/swept volume
ANS- A
3.Scavenging air of diesel cycle means-
A.air used for combustion.
B.forced air for cooling cylinder.
C.air used for forcing burnt gases out of engine's during the exhaust period.
D.air fuel mixture.
ANS- C
4.The working cycle un case of four stroke engine is completed in following number of revolutions of crankshaft-
A. 1/2 B. 1
C. 2 D. 8
ANS - C
5.An engine indicator is used to determine the following-
A. Speed B.temperature
C. BHP D.m.e.p & I.H.P
ANS- D
6.Supercharging is the process of-
A.supplying the intake of an engine with air at a density greater than the density of the surrounding atmospher.
B.providing forced cooling air.
C.injecting excess fuel for raising more load.
D.raising exhaust pressure.
ANS - A
7.The air standard efficiency of an otto cycle compared to diesel cycle for the given compression ratio is-
A. Same B. Less
C. More D.unpredictable
ANS - C
8.In a diesel engine,the fuel is ignited by-
A. Spark B.Injected fuel
C. heat resulting from compressing air that is supplied for combustion.
D. Combustion chamber.
ANS - C
9.In case of gas turbines,the gasious fuel consumption guarantees are based on-
A.high heat value B.low heat value C.net calorific value D.middle heat value
ANS- B
10.The specified fuel consumption per BHP hours for diesel engine is approximately-
A. 0.15 kg B. 0.2 kg
C. 0.25 kg D. 0.3 kg
ANS - B
11.The maximum temperature of I.C engine cylinder of the order of-
A. 500-1000°C B. 1000-1500°C
C. 2000-2500°C D. 2500-3000°C
ANS - C
12.The fuel in diesel engine is normally injected at pressure of-
A. 5-10 kg/cm^2. B. 20-25 kg/cm^2
C. 60-80 kg/cm^2 D. 90-130 kg/cm^2
ANS - D
13.The ratio of indicated tharmal efficiency to corresponding air standard cycle efficiency is called-
A. Net efficiency B. Efficiency ratio
C. Relative efficiency D. Overall efficiency
ANS - C
14.Combustion in compression ignition engines is-
A. Homogeneous B. Heterogeneous
C both A&B D. Turbulent
15. The specific fuel consumption per BHP hour for a petrol engine is approximately-
A. 0.15 kg B. 0.2 kg
C. 0.25 kg D. 0.3 kg
ANS - C
16.Compression loss I.C engine occurs due to-
A. Leaking piston rings
B. Use of thick head gasket
C. Clogged air-inlet slots
D. All this above
ANS -D
17.The inet valve of 4 stroke cycle I.C engine remains open for nearly-
A. 180° B.125 °
C. 200° D. 235°
ANS - D
18.The precesses of braking up or a liquid into fine droplets by spraying is called-
A. Vaporisation B. Carburetion
C. Injection D.atomisation
ANS -D
19.Which of following is not internal combustion engine?
A. 2 stroke engine B. 4 stroke engine
C. Gas turbine D. Steam engine
ANS - D
20.Most high speed compression engines operates on-
A. Diesel cycle B. Dual cycle
C. Otto cycle D. Carnnot cycle
ANS - D
21.Gaseous-fuel garantees are based on-
A. Calorific value of oil.
B. Low heat value of oil.
C. High heat value of oil.
D. All of the above.
ANS- B
22.When crude oil is heated,then which of the following hydrocarbon is given off first-
A. Natural gas B. Kerosene
C. Diesel D. Paraffin
ANS - A
23.A 75 cc engine has following parameters as 75 cc -
A. Fuel tank capacity. B. Lub oil capacity
C. Swept volume D. Cylinder volume
ANS- C
24.In diesel engine diesel fuel injected into the cylinder would burn instantly at about compressed air temperature of-
A. 250° B. 500°
C. 1000° D. 1500°
ANS - C
25.The air fuel ratio of the petrol engine is controlled by-
A. Fuel pump B. Carburettor
C. Injector D. Governor
ANS - B
Comments
Post a Comment