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41.

A closed vessel contains air at 1.2 ata and 57?C. The pressure of air in the vessel if the contents of the vessel are cooled to 37?C would be

A.	2.327 ata	B.	1.2 ata
C.	1.127 ata	D.	0.563 ata
E.	0.073 ata

42.

The size of a steam engine is 200 x 250 - 300 r.p.m. In this 200 indicates

A.	Horse power	B.	Shaft diameter
C.	Steam pressure in 1bs/sq. in.	D.	Cylinder bore
E.	Piston stroke

43.

In a condensing steam engine

A.	Condensed steam is supplied	B.	Steam condenses inside cylinder
C.	Steam condenses as soon as it leaves the cylinder	D.	Exhaust steam is condensed in condenser
E.	Exhaust steam is not recirculated

44.

The total length of 40 mid-ordinates on a simple steam engine indicator diagram is 17 cm. The pressure scale is 0.6 kg/sq-cm. The mean effective pressure would be

A.	1.0 kg/sq-cm	B.	1.7 kg/sq-cm
C.	1.0 kg/sq-cm	D.	10.2 kg/sq-cm
E.	None of the above

45.

For steam engine having a throttle governor, a straight line is obtained when the total weight of steam used per hour is plotted against the indicated horse power. This line is known as

A.	Clapeyron's line	B.	Calender's line
C.	Willian's line	D.	Hopson's line
E.	Bunsen line

46.

A vacuum of 712 mm was obtained with the barometer reading 753 mm of mercury. The corrected vacuum to a standard barometer of 760 would be

A.	719 mm Hg	B.	712 mm Hg
C.	706 mm Hg	D.	753 mm Hg
E.	760 mm Hg

47.

Intercooling in multistage compressors is done

A.	To cool the air at delivery	B.	To enable use of small cylinders and eliminate problems of unbalanced forces
C.	To minimise the work of compression	D.	To supply-air at two different pressures for use
E.	To cool air during compression

48.

Volume of air at 27?C is 2 cu-m. What will be the volume at 327?C

A.	2 cu-m	B.	3 cm-m
C.	4 cu-m	D.	8 cu-m
E.	12 cm-m

49.

Free air is air at

A.	Atmospheric conditions at any specific location	B.	1 kg/cm2 and atmospheric temperature
C.	1 kg/cm2 and 0?C	D.	1 kg/cm2 and 20?C
E.	1 kg/cm2 and 27?C

50.

Standard air is air at

A.	Atmospheric conditions at any specific location	B.	1 kg/cm2 and atmospheric temperature (Relative humidity of 64%)
C.	1 kg/cm2 and 20?C (Relative humidity of 36%)	D.	1 kg/cm2 and 0?C (Relative humidity of 36%)
E.	None of the above