Q.1
What is the value of working fluid in dual cycle?
  • a) 1.0
  • b) 1.2
  • c) 1.4
  • d) 1.8
Q.2
The compression ratio (r) of dual cycle is equal to ________
  • a) r = volume of the cylinder at the beginning of the compression/volume of the cylinder at the end of the compression
  • b) r = volume of the cylinder at the end of the compression/ volume of the cylinder at the beginning of the compression
  • c) r = clearance volume/ volume of the cylinder at the beginning of the compression
  • d) r = volume of the cylinder at the end of the compression/clearance volume
Q.3
The cut-off ratio (ρ) of dual cycle is equal to ________
  • a) Volume at which fuel supply cutoff to volume at which fuel supply start
  • b) Volume at which fuel supply throughout the process to volume at which fuel supply cutoff
  • c) Volume at which fuel supply cutoff to volume of fuel supply throughout the process
  • d) Volume at which fuel supply start to volume at which fuel supply cutoff
Q.4
What is the efficiency of dual cycle if compression ratio and cut-off ratio is equal toand 1.4 respectively?
  • a) 68%
  • b) 63%
  • c) 60%
  • d) 65%
Q.5
What is the relation between compression ratio, cutoff ratio and expansion ratio?
  • a) re = ρ×r
  • b) re = ρ/r
  • c) re = 1/ρr
  • d) re = r/ρ
Q.6
What is the other name of dual cycle?
  • a) Mixed cycle
  • b) Otto cycle
  • c) Diesel cycle
  • d) Joule Cycle
Q.7
Dual cycle is combination of__________
  • a) Stirling and diesel cycle
  • b) Otto and diesel cycle
  • c) Stirling and otto cycle
  • d) Otto and Brayton cycle
Q.8
Dual cycle consist of __________
  • a) Two constant pressure and two adiabatic process
  • b) Two constant volume and two adiabatic process
  • c) One constant pressure process, two constant volume process and two adiabatic process
  • d) One constant pressure process, one constant volume process and two adiabatic process
Q.9
In a dual cycle heat rejection takes place ______
  • a) At constant volume process
  • b) At constant pressure process
  • c) First at constant volume then at constant pressure process
  • d) First at constant pressure then at constant volume process
Q.10
In a dual cycle heat addition takes place ________
  • a) At constant volume process
  • b) At constant pressure process
  • c) First at constant volume then at constant pressure process
  • d) First at constant pressure then at constant volume process
Q.11
Most high speed compression ignition operates on ________
  • a) Diesel cycle
  • b) Otto cycle
  • c) Brayton cycle
  • d) Dual cycle
Q.12
What is the efficiency of dual cycle if compression ratio and cut-off ratio is equal toand 1.4 respectively?
  • a) 91%
  • b) 90.8%
  • c) 90.6%
  • d) 90%
Q.13
Determine the value of expansion ratio if compression ratio and cutoff ratio is equal toand 1.4 respectively.
  • a) 10.5
  • b) 21
  • c) 11
  • d) 10.7
Q.14
Determine the value of cutoff ratio if compression ratio and expansion ratio is equal toandrespectively.
  • a) 1.4
  • b) 1.36
  • c) 1.5
  • d) 1.3
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