Ball valves are commonly used to_________?

A. Throttle flow
B. Check flow
C. Change flow direction
D. Start/stop flow

The part of the coupling that actually transmits power and rotation from one shaft to the other shaft is_________?

A. Gap
B. Hub
C. Key
D. Driver

Which tool is used to measure gap size in a rough alignment?

A. Inside caliper
B. Dial indicator
C. Feeler gage
D. Measuring tape

The stress developed in a material at breaking point in extension is called__________?

A. Breaking stress
B. Fracture stress
C. Yield point stress
D. Proof stress

The radius of a dished head is taken approximately as______________________?

A. One-fourth
B. Half
C. One
D. Two

Thermal efficiency of a thermal power plant is of the order of___________________?

A. 15%
B. 20%
C. 30%
D. 45%

In forced circulation type boiler__________________?

A. Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B. Water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
C. Feed pump is employed to supplement natural circulation in water wall type furnace
D. Water is converted into steam in one pass without any recirculation

The overall efficiency of thermal power plant is________________?

A. Boiler efficiency, turhine efficiecny, generator efficiency
B. All the three above plus gas cycle efficiency
C. Carnot cycle efficiency
D. Regenerative cycle efficiency

In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine__________________?

A. Lancashire boiler
B. Locomotive boiler
C. Babcock and wilcox boiler
D. Cochran boiler

The heat loss in a boiler takes place in the form of________________?

A. heat carried away by flue gases
B. heat carried away by ash
C. mositure present in fuel and steam formed by combustion of hydrogen in fuel
D. radiation