Question:

Critical pressure ratio is ratios of pressures at discharge.

A.

minimum

B.

none of the mentioned

C.

optimum

D.

maximum

Answer» d. maximum

Question:

When the pressure chamber is big, the flow velocities are                    

A.

large

B.

negligible

C.

constant

D.

increasing

Answer» b. negligible

Question:

Which is the correct advantage of solid fuels out of the given option?

A.

they have low ignition temperature

B.

they produce small amount of smoke

C.

they have higher calorific value

D.

they do not form any clinker

Answer» a. they have low ignition temperature

Question:

Which of the following condenses first?

A.

ammonia vapour

B.

water vapour

C.

both condense at same temperature

D.

none of the mentioned

Answer» b. water vapour

Question:

Astern turbines are used in                    

A.

power generation

B.

marine purposes

C.

aircraft

D.

none of the mentioned

Answer» b. marine purposes

Question:

Choose the proper disadvantage of solid fuels out of the given option?

A.

they produce lot of smoke

B.

they have low ignition temperature

C.

they are high in production cost

D.

they cannot be easily transported

Answer» a. they produce lot of smoke

Question:

Which of the following is recommended in a refrigeration cycle?

A.

superheating of vapour

B.

subcooling of liquid

C.

both of the mentioned

D.

none of the mentioned

Answer» c. both of the mentioned

Question:

Aeroderivative engines have pressure ratios

A.

greater than 30

B.

lesser than 30 and greater than 20

C.

greater than 50

D.

none of the mentioned

Answer» a. greater than 30

Question:

If mach number is less than one then its flow is                              

A.

subsonic flow

B.

turbulent flow

C.

laminar flow

D.

none of the mentioned

Answer» a. subsonic flow

Question:

A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.

A.

60kg f

B.

48kg f

C.

25kg f

D.

32kg f

Answer» b. 48kg f