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Home » Engineering » Aptitude Test - 120
Hassan
1.The purpose of testing an internal combustion engine is
A. to determine the information, which can not be obtained by calculations
B. to conform the data used in design, the validity of which may be doubtful
C. to satisfy the customer regarding the performance of the engine
D. to determine the information, which can not be obtained by calculations
2.The thermal efficiency of diesel engines is about
A. 15%
B. 30%
C. 50%
D. 15%
3.A diesel engine has
A. one valve
B. two valves
C. three valves
D. one valve
4.The self ignition temperature of petrol is _____ as compared to diesel oil.
A. same
B. lower
C. higher
D. same
5.The pressure inside the cylinder is ______ the atmospheric pressure during the exhaust stroke.
A. equal to
B. below
C. above
D. equal to
6.The increase of cooling water temperature in petrol engine will ____the knocking tendency.
A. not effect
B. decrease
C. increase
D. not effect
7.A carburettor is used to supply
A. petrol, air and lubricating oil
B. air and diesel
C. petrol and lubricating oil
D. petrol, air and lubricating oil
8.U233 is produced
A. artificially
B. as basic raw material
C. when thorium is irradiated by neutrons
D. artificially
9.The pressure at the end of compression, in diesel engines, is approximately
A. 10 bar
B. 20 bar
C. 25 bar
D. 10 bar
10.The energy released during the fission of one atom of Uranium - 235 in million electron volts is about
A. 100
B. 200
C. 300
D. 100
11.Morse test can be conducted for
A. petrol engines
B. diesel engines
C. multi-cylinder engines
D. petrol engines
12.The basic requirement of a good combustion chamber is
A. minimum turbulence
B. low compression ratio
C. high thermal efficiency and power output
D. minimum turbulence
13.The thermal efficiency of diesel engines on weak mixtures is
A. unaffected
B. lower
C. higher
D. unaffected
14.The injection pressure in a diesel engine is about
A. 10 bar
B. 100 bar
C. 150 bar
D. 10 bar
15.High speed compression engines operate on
A. Otto cycle
B. Diesel cycle
C. Dual-combustion cycle
D. Otto cycle
16.The nuclear power station at Tarapur has the reactor of the _____type.
A. pressurized water
B. boiling water
C. gas cooled
D. pressurized water
17.The secondary fuel used in nuclear power plants is
A. U233 and Pu239
B. U235 and Th232
C. U235 and Pu238
D. U233 and Pu239
18.Theoretically, a four stroke cycle engine should develop __ power as that of a two stroke cycle engine.
A. half
B. same
C. double
D. half
19.The higher combustion chamber wall temperature in compression ignition engines will __ knocking tendency.
A. increase
B. reduce
C. not effect
D. increase
20.The nuclear radiators produced in a reactor which must be sheilded are
A. electrons
B. ?, ? and ? rays
C. neutron and gamma rays
D. electrons
21.The delay period in compression ignition engines depends upon
A. temperature and pressure in the cylinder at the time of injection
B. nature of the fuel mixture strength
C. relative velocity between the fuel injection and air turbulence pressure of residual gases
D. temperature and pressure in the cylinder at the time of injection
22.The theoretically correct mixture of air and petrol is
A. 10:01
B. 15:01
C. 20:01
D. 10:01
23.The function of a distributor in a coil ignition system of I.C. engines is
A. to distribute spark
B. to distribute power
C. to distribute current
D. to distribute spark
24.A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
A. stable under nuclear radiation
B. corrossion resistant
C. good thermal conductor
D. stable under nuclear radiation
25.The frictional power (F.P.) is given by
A. F.P. = B.P. - I.P.
B. F.P. = I.P. - B.P.
C. F.P. = B.P./I.P.
D. F.P. = B.P. - I.P.
26.A diesel engine has compression ratio from
A. 6 to 10
B. 10 to 15
C. 15 to 25
D. 6 to 10
27.A petrol engine, during suction stroke draws
A. air only
B. petrol only
C. a mixture of petrol and air
D. air only
28.A supercharged engine as compared to an ordinary engine
A. requires smaller foundation
B. is lighter
C. consumes less lubricating oil
D. requires smaller foundation
29.Which of the following does not relate to a compression ignition engine?
A. Fuel pump
B. Fuel injector
C. Governor
D. Fuel pump
30.Supercharging __________ the power developed by the engine.
A. has no effect on
B. increases
C. decreases
D. has no effect on
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