Ram-jet engine__________________?
(A) is self-operating at zero flight speed
(B) is not self-operating at zero^flight speed
(C) requires no air for its operation
(D) produces a jet consisting of plasma
(D) none of the above
A simple turbo-jet engine is basically_________________?
(A) a propeller system
(B) gas-turbine engine equipped with a propulsive nozzle and diffuse*
(C) chemical rocket regine
(D) ram-jet enigne
(D) none of the above
In turbo fan engine, the jet velocity as compared to turbo-jet engine is_________________?
(A) less
(B) more
(C) same
(D) may be less or more depening upon speed
(D) none of the above
Pressure ratio in gas turbines is the ratio of ____________________?
(A) compressor pressure ratio
(B) highest pressure to exhaust pressure
(C) inlet pressure to exhaust pressure
(D) pressures across the turbine
(D) none of the above
Which of the following plants is smallest and lightest for genrating a given amount of power__________________?
(A) steam power plant
(B) petrol engine
(C) diesel engine’
(D) solar plant
(D) gas turbine plant
Centrifugal pump is started with its delivery valve __________________?
(A) kept fully closed
(B) kept fully open
(C) irrespective of any position
(D) kept 50% open
(D) none of the above
For starting an axial flow pump, its delivery valve should be____________________?
(A) closed
(B) open
(C) depends on starting condition and flow desired
(D) could be either open or closed
(D) partly open and partly closed
The operation of straightening a curved sheet metal, is known as____________________?
(A) squeezing
(B) coining
(C) planishing
(D) drawing
Tandem drawing of wires and tubes is necessary because_________________?
(A) accuracy in dimensions is not possible otherwise
(B) surface finish improves after every drawing stage
(C) it is not possible to reduce at one stage
(D) annealing is needed between stages
The shrinkage allowance for cast iron pattern is________________?
(A) 15 mm/m
(B) 20 mm/m
(C) 26 mm/m
(D) 10 mm/m