Electrical Engineering Mcqs Practice Test

Question 1

The value of reheat factor normally varies from___________?

Accepted Answer

C. 1.02 to 1.06

Question 2

Reheat factor in steam turbines depends on______________?

Accepted Answer

C. initial pressures and temperature only

Question 3

For Parson’s reaction steam turbine, degree of reaction is____________?

Accepted Answer

C. 50%

Question 4

Parson’s turbine is___________?

Accepted Answer

D. multi wheel reaction steam turbine

Question 5

Rateau steam turbine is______________?

Accepted Answer

C. pressure compounded impulse steam turbine

Question 6

Curtis turbine is_____________?

Accepted Answer

B. pressure velocity compounded steam turbine

Question 7

Incase of reaction steam turbine___________?

Accepted Answer

A. there is enthalpy drop both in fixed and moving blades

Question 8

In De Laval steam turbine___________?

Accepted Answer

A. the pressure in the turbine rotor is approximately same as in con¬denser

Question 9

The pressure on the two sides of the impulse wheel of a steam turbine_____?

Accepted Answer

A. is same

Question 10

In case of impulse steam turbine_____________?

Accepted Answer

C. there is enthalpy drop in nozzles

Question 11

The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?

Accepted Answer

A. increase in dryness fraction of exit steam

Question 12

The effect of considering friction losses in steam nozzle for the same pressure ratio leads to________?

Accepted Answer

B. decrease in exit velocity from the nozzle

Question 13

The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation?

Accepted Answer

D. pv

Question 14

The critical pressure ratio of a convergent nozzle is defined as_____________?

Accepted Answer

D. the ratio of outlet pressure to inlet pressure only when mass flow rate = c

Question 15

The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is__________?

Accepted Answer

C. 0.5457

Question 16

The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?

Accepted Answer

B. 0.578

Question 17

The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?

Accepted Answer

A. pvls=C

Question 18

The efficiency of chimney is approximately______________?

Accepted Answer

D. 0.25%

Question 19

The pressure at the furnace is minimum in case of___________?

Accepted Answer

C. balanced draught system

Question 20

For the induced draught the fan is located_______________?

Accepted Answer

A. near bottom of chimney