Thermal efficiency of an internal combustion engine is around ______________ percent?
Thermal efficiency of an internal combustion engine is around ______________ percent?
A. 8
B. 35
C. 65
D. 80
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In continuous casting of liquid steel, the mould is made of
Question: In continuous casting of liquid steel, the mould is made of
[A].water cooled steel [B].
water cooled copper. [C].
refractory oxide. [D].
silicon carbide. Answer: Option B
Explanation:
No answer description available for this question.
Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
Question: Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than
[A].5 [B].
10 [C].
20 [D].
35 Answer: Option C
Explanation:
No answer description available for this question.
Compressed dry air is used as the cutting fluid, while machining____________________?
Compressed dry air is used as the cutting fluid, while machining____________________?A. Steel
B. Cast iron
C. Aluminium
D. None of theseThe ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?A. T
B. 1/T
C. T2
D. 1/T2A gas having a negative Joule-Thompson co-efficient, when throttled, will
Question: A gas having a negative Joule-Thompson co-efficient, when throttled, will
[A].become hotter. [B].
become cooler. [C].
remain unchanged. [D].
liquefy. Answer: Option A
Explanation:
No answer description available for this question.
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1