A. 0.02%
B. 0.3%
C. 0.63%
D. 0.8%
E. 1.2%.
Mechanical Engineering Mcqs
In nuclear fission___________________?
A. the original elements change into completely different elements
B. the electrons of the element change
C. the molecules rearrange themselves to form other molecules
D. none of the above
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of____________?
A. 0.25
B. 0.45
C. 0.55
D. 0.65
E. 0.75
Corrundum contains more than 95% _____________________?
A. steel
B. A1203
C. Si02
D. MgO
E. german silver
One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is__________________?
A. 0.2
B. 0.8
C. 1.0
D. 0.6
E. 0.5
In vapor compression cycle the condition off refrigerant is dry saturated vapor________________?
A. after passing through the condenser
B. before passing through the condenser
C. after passing through the expansion or throttle valve
D. before entering the expansion valve
E. before entering the compressor
The overall isothermal eiffciency of compressor is defined as the ratio of_______________?
A. isothermal h.p. to the BHP of motor
B. isothermal h.p. to adiabatic h.p.
C. power to drive compressor to isothermal h.p.
D. work to compress air isothermally to work for actual compression
E. isothermal work to ideal work
Where does the lowest temperature occur in a vapour compression cycle ?
A. condenser
B. evaporator
C. compressor
D. expansion valve
E. receiver
Principle of similitude forms the basis of_________________?
A. comparing two identical equipments
B. designing models so that the result can be converted to prototypes
C. comparing similarity between design and actual equipment
D. hydraulic designs
E. performing acceptance tests
Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?
A. specific heat at constant pressure
B. specific heat at constant volume
C. ratio of two specific heats
D. gas constant
E. unity.
