Engineering Questions with Answers - Multiple Choice Questions

# Aircraft Performance MCQ – Cruise Method 1 – 1

1 - Question

In cruise method 1 the air pressure is decreased whereas the aircraft weight is increased.
a) True
b) False

Explanation: In cruise method 1 the air pressure is decreased as well as the aircraft weight is decreased. In cruise method 1 the W/p ratio is maintained constant and also L/D ratio is also kept constant.

2 - Question

What is the condition of cruise method 1?
a) Air pressure is increased
b) Aircraft weight is increased
c) W/D ratio is kept constant
d) L/D ratio is varying

Explanation: In cruise method 1 the air pressure is decreased as well as the aircraft weight is decreased. In cruise method 1 the W/p ratio is maintained constant and also L/D ratio is also kept constant.

3 - Question

Cruise climb technique is involved in ___________
a) cruise method 1
b) cruise method 2
c) cruise method 3
d) cruise method 4

Explanation: Cruise climb technique is involved in cruise method 1. In cruise method 1 the air pressure is decreased as well as the aircraft weight is decreased. In cruise method 1 the W/p ratio is maintained constant and also L/D ratio is also kept constant.

4 - Question

Which of the following is incorrect statement regarding cruise method 1?
a) W/D ratio is kept constant
b) L/D ratio is varying
c) Air pressure is decreased
d) Aircraft weight is decreased

Explanation: In cruise method 1 the air pressure is decreased as well as the aircraft weight is decreased. In cruise method 1 the W/p ratio is maintained constant and also L/D ratio is also kept constant.

5 - Question

What is Brequet Range expression?
a) R1 = DCLV ln ω
b) R1 = 1C[2WρS]12C12LCD ln ω
c) R1 = 1V[2WρS]12C12LCD ln ω
d) R1 = VCLD ln ω

nswer: d
Explanation: Brequet Range expression is given by R1 = VCLD ln ω where V is true airspeed, C is specific fuel consumption, L is lift, D is drag, and ω is fuel ratio. This Brequet Range expression comes in the cruise method 1.

6 - Question

Brequet Range expression value is maximum at __________
a) 1.316 Vmd
b) 1.216 Vmd
c) 1.3 Vmd
d) 1.2 Vmd

Explanation: Brequet Range expression is given by R1 = VCLD ln ω where V is true airspeed, C is specific fuel consumption, L is lift, D is drag, and ω is fuel ratio. This Brequet Range expression comes in the cruise method 1. Brequet Range expression value is maximum at 1.316 Vmd.

7 - Question

What is range factor in cruise method 1?
a) [VmdiCEmax]
b) [VmaxCEmax]
c) {2u3u4+1}
d) {2u4u4+1}

Explanation: Range factor in cruise method 1 is given by [VmdiCEmax]. The range equation in cruise method 1 is given by R1 = [VmdiCEmax]{2u3u4+1} ln ω where V is true airspeed, C is specific fuel consumption, L is lift, D is drag, Emax is endurance and ω is fuel ratio.

8 - Question

Which of the following does range factor consists?
a) Air density
b) Cruise weight
c) Temperature
d) Cruise weight and air density