C:-21
D:-25
Correct Answer:- Option-C

Question46:-If 'P' is the Ratio of inside to outside diameter of a shaft, the ratio of torque carrying capacity of solid shaft to
that of hollow shaft is given by
(1-874) ೧(-1)`
1-4۰
7೧47
:- (1)॥(774)
Correct Answer:- Option-A
Question47:-Angle of helix in a closed coiled spring is
A:-<100
B:->100
0 00
D:-None
Correct Answer:- Option-A
Question48:-For the same maximum pressure and temperature of Otto, Diesel and dual combustion air standard cycles
A:-The compression ratio will be same
B:-Heat supplied to the cycles will be same
C:-Air standard efficiency will have same value
D:-Heat rejected by the engine will be same
Correct Answer:- Option-D
Question49:-The mass of carbon per kg of flue gas is given by
4:- ` 3760 (2) +(11)/(3)` (0
(7)/(3)0 (2) +3//11 0
321002) + 7/3 CO
ഉ:- (11)/(3)60. (2) + 3/7` 0
Correct Answer:- Option-D
Question50:-Critical thickness of insulation for sphere is given by
[k *->* thermal conductivity, h ‘->* heat transfer coefficient]
‏۰۸ھ‎
‎8:- (69/48)
൩/൮
0:- 2௮/0
Correct Answer:- Option-D
Question51:-In a certain Heat exchanger, both fluids have identical mass flow rate -sp. heat product. The hotfluid enters at
76°C and leaves at 47°C and cold fluid enters at 26°C and leaves at 55°C. The effectiveness of heat exchanger is
A:-0.16
B:-0.58
C:-0.72
D:-1.0
Correct Answer:- Option-B
Question52:-When ammonia is used as Refrigerant, the recommended material used for Refrigerant lines are
A:-Copper
B:-Aluminium
C:-Steel
D:-Brass
Correct Answer:- Option-C
Question53:-A Spark plug gap should be
A:-0.2 to 0.8 mm
B:-0.3 to 0.7 mm
C:-0.4 to 0.9 mm
D:-0.6 to 1.0 mm
Correct Answer:-Question Cancelled
Question54:-Which type of compressor mostly used in supercharger of internal combustion engines ?
A:-Roots blower
B:-Axial flow compressor
C:-Redial flow compressor
D:-Reciprocating compressor
Correct Answer:- Option-C