Which of the following power plant has least efficiency_________?
(A) Nuclear power plant
(B) Hydro power plant
(C) Steam power plant
(D) Diesel power plant
A steam power stations basically work on the______________?
(A) thermodynamic cycle
(B) Rankin cycle
(C) Vapor pressure cycle
(D) Carton cycle
Which of the following Power Plant causes least environmental pollution____________?
(A) Thermal Power Plant
(B) Hydro Power Plant
(C) Nuclear Power Plant
(D) Diesel Power Plant
Which of the following power plant usually offer highest maintenance cost___________?
(A) Nuclear power plants
(B) Hydro-electric power plants
(C) Thermal power plants
(D) Diesel engine power plant
The overall efficiency of a steam power station is ________ its thermal efficiency.
(A) less than
(B) equal to
(C) greater than
(D) none of the above
Which of the following is usually not the generating voltage__________?
(A) 6.6 kV
(B) 9.9 kV
(C) 11kV
(D) 13.2kV
For starting a D.C. motor a starter is required because___________?
(A) it limits the speed of the motor
(B) it limits the starting current to a safe value
(C) it starts the motor
(D) none of the above
A D.C. series motor is that which______________?
(A) has its field winding consisting of thick wire and less turns
(B) has a poor torque
(C) can be started easily without load
(D) has almost constant speed
In D.C. shunt motors as load is reduced__________________?
(A) the speed will increase abruptly
(B) the speed will increase in proportion to reduction in load
(C) the speed will remain almost/constant
(D) the speed will reduce
Starters are used with D.C. motors because______________?
(A) these motors have high starting torque
(B) these motors are not self-starting
(C) back e.m.f. of these motors is zero initially
(D) to restrict armature current as there is no back
(D) m.f. while starting